17. 3D Vector Graphics
Module GL
- Description
Not implemented OpenGL methods:
glAreTexturesResident glBitmap glBlendColorEXT glCallLists glColorPointer glDeleteTextures glDrawElements glEdgeFlagPointer glEdgeFlagv glEvalMesh glFeedbackBuffer glGenTextures glGetBooleanv glGetClipPlane glGetDoublev glGetFloatv glGetIntegerv glGetLight glGetMap glGetMaterial glGetPixelMap glGetPointerv glGetPolygonStipple glGetTexEnv glGetTexGen glGetTexImage glGetTexLevelParameter glGetTexParameter glIndexPointer glInterleavedArrays glMap1 glMap2 glMapGrid glNormalPointer glPixelMap glPixelStore glPixelTransfer glPolygonStipple glPrioritizeTextures glReadPixels glRect glSelectBuffer glTexCoordPointer glTexImage1D glTexSubImage1D glVertexPointer
- ConstantGL_ACCUM
constantintGL.GL_ACCUM- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glAccum,glGetDoublevandglClear
- ConstantGL_ACCUM_ALPHA_BITS
constantintGL.GL_ACCUM_ALPHA_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glAccumandglGetDoublev
- ConstantGL_ACCUM_BLUE_BITS
constantintGL.GL_ACCUM_BLUE_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glAccumandglGetDoublev
- ConstantGL_ACCUM_BUFFER_BIT
constantintGL.GL_ACCUM_BUFFER_BIT- Description
Used in
glPopAttrib,glPushAttribandglClear
- ConstantGL_ACCUM_CLEAR_VALUE
constantintGL.GL_ACCUM_CLEAR_VALUE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_ACCUM_GREEN_BITS
constantintGL.GL_ACCUM_GREEN_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glAccumandglGetDoublev
- ConstantGL_ACCUM_RED_BITS
constantintGL.GL_ACCUM_RED_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glAccumandglGetDoublev
- ConstantGL_ALL_ATTRIB_BITS
constantintGL.GL_ALL_ATTRIB_BITS- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_ALPHA
constantintGL.GL_ALPHA- Description
Used in
glIsEnabled,glTexEnv,glGetIntegerv,glDrawPixels,glDisable,glCopyTexImage1D,glTexSubImage2D,glPopAttrib,glEnable,glPixelTransfer,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glAlphaFunc,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_ALPHA12
constantintGL.GL_ALPHA12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_ALPHA16
constantintGL.GL_ALPHA16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_ALPHA4
constantintGL.GL_ALPHA4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_ALPHA8
constantintGL.GL_ALPHA8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_ALPHA_BIAS
constantintGL.GL_ALPHA_BIAS- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_ALPHA_BITS
constantintGL.GL_ALPHA_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_ALPHA_SCALE
constantintGL.GL_ALPHA_SCALE- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_ALPHA_TEST
constantintGL.GL_ALPHA_TEST- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglAlphaFunc
- ConstantGL_ALPHA_TEST_FUNC
constantintGL.GL_ALPHA_TEST_FUNC- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_ALPHA_TEST_REF
constantintGL.GL_ALPHA_TEST_REF- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_ALWAYS
constantintGL.GL_ALWAYS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublev,glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_AMBIENT
constantintGL.GL_AMBIENT- Description
Used in
glGetIntegerv,glColorMaterial,glGetLight,glGetBooleanv,glGetFloatv,glMaterial,glGetDoublev,glLightandglGetMaterial
- ConstantGL_AMBIENT_AND_DIFFUSE
constantintGL.GL_AMBIENT_AND_DIFFUSE- Description
Used in
glGetIntegerv,glColorMaterial,glGetBooleanv,glGetFloatv,glMaterialandglGetDoublev
- ConstantGL_ATTRIB_STACK_DEPTH
constantintGL.GL_ATTRIB_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_AUTO_NORMAL
constantintGL.GL_AUTO_NORMAL- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglEvalCoord
- ConstantGL_AUX_BUFFERS
constantintGL.GL_AUX_BUFFERS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glReadBuffer,glGetDoublevandglDrawBuffer
- ConstantGL_BACK
constantintGL.GL_BACK- Description
Used in
glGetIntegerv,glColorMaterial,glCullFace,glPolygonMode,glGetBooleanv,glGetFloatv,glReadBuffer,glMaterial,glGetDoublev,glDrawBufferandglGetMaterial
- ConstantGL_BITMAP
constantintGL.GL_BITMAP- Description
Used in
glDrawPixels,glTexSubImage2D,glGetTexImage,glReadPixels,glTexImage2D,glFeedbackBuffer,glGetPolygonStipple,glBitmap,glTexSubImage1D,glTexImage1DandglPolygonStipple
- ConstantGL_BLEND
constantintGL.GL_BLEND- Description
Used in
glIsEnabled,glTexEnv,glGetIntegerv,glBlendColorEXT,glBlendFunc,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_BLEND_COLOR_EXT
constantintGL.GL_BLEND_COLOR_EXT- Description
Used in
glGetIntegerv,glBlendColorEXT,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_BLEND_DST
constantintGL.GL_BLEND_DST- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_BLEND_EQUATION_EXT
constantintGL.GL_BLEND_EQUATION_EXT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_BLEND_SRC
constantintGL.GL_BLEND_SRC- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_BLUE
constantintGL.GL_BLUE- Description
Used in
glGetIntegerv,glDrawPixels,glTexSubImage2D,glPopAttrib,glPixelTransfer,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_BLUE_BIAS
constantintGL.GL_BLUE_BIAS- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_BLUE_BITS
constantintGL.GL_BLUE_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_BLUE_SCALE
constantintGL.GL_BLUE_SCALE- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_BYTE
constantintGL.GL_BYTE- Description
Used in
glDrawPixels,glColorPointer,glTexSubImage2D,glNormalPointer,glGetTexImage,glCallLists,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_CCW
constantintGL.GL_CCW- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglFrontFace
- ConstantGL_CLIENT_ALL_ATTRIB_BITS
constantintGL.GL_CLIENT_ALL_ATTRIB_BITS- Description
Used in
glPopClientAttribandglPushClientAttrib
- ConstantGL_CLIENT_ATTRIB_STACK_DEPTH
constantintGL.GL_CLIENT_ATTRIB_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_CLIENT_PIXEL_STORE_BIT
constantintGL.GL_CLIENT_PIXEL_STORE_BIT- Description
Used in
glPopClientAttribandglPushClientAttrib
- ConstantGL_CLIENT_VERTEX_ARRAY_BIT
constantintGL.GL_CLIENT_VERTEX_ARRAY_BIT- Description
Used in
glPopClientAttribandglPushClientAttrib
- ConstantGL_COLOR
constantintGL.GL_COLOR- Description
Used in
glIsEnabled,glGetIntegerv,glDrawElements,glDrawArrays,glColorMaterial,glDrawPixels,glDisable,glColorPointer,glTexSubImage2D,glPopAttrib,glEnable,glEnableClientState,glGetPointerv,glPixelTransfer,glLogicOp,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glMaterial,glGetDoublev,glReadPixels,glTexImage2D,glGetPolygonStipple,glBitmap,glCopyPixels,glLightModel,glDisableClientState,glTexSubImage1D,glTexImage1D,glGetMaterial,glClearandglPolygonStipple
- ConstantGL_COLOR_ARRAY
constantintGL.GL_COLOR_ARRAY- Description
Used in
glIsEnabled,glGetIntegerv,glDrawElements,glDrawArrays,glColorPointer,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glGetDoublevandglDisableClientState
- ConstantGL_COLOR_ARRAY_SIZE
constantintGL.GL_COLOR_ARRAY_SIZE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_ARRAY_STRIDE
constantintGL.GL_COLOR_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_ARRAY_TYPE
constantintGL.GL_COLOR_ARRAY_TYPE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_BUFFER_BIT
constantintGL.GL_COLOR_BUFFER_BIT- Description
Used in
glPopAttrib,glPushAttribandglClear
- ConstantGL_COLOR_CLEAR_VALUE
constantintGL.GL_COLOR_CLEAR_VALUE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_INDEX
constantintGL.GL_COLOR_INDEX- Description
Used in
glDrawPixels,glTexSubImage2D,glPixelTransfer,glGetTexImage,glMaterial,glReadPixels,glTexImage2D,glGetPolygonStipple,glBitmap,glLightModel,glTexSubImage1D,glTexImage1D,glGetMaterialandglPolygonStipple
- ConstantGL_COLOR_INDEXES
constantintGL.GL_COLOR_INDEXES- Description
Used in
glMaterial,glLightModelandglGetMaterial
- ConstantGL_COLOR_LOGIC_OP
constantintGL.GL_COLOR_LOGIC_OP- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glLogicOp,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_MATERIAL
constantintGL.GL_COLOR_MATERIAL- Description
Used in
glIsEnabled,glGetIntegerv,glColorMaterial,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_MATERIAL_FACE
constantintGL.GL_COLOR_MATERIAL_FACE- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_MATERIAL_PARAMETER
constantintGL.GL_COLOR_MATERIAL_PARAMETER- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COLOR_WRITEMASK
constantintGL.GL_COLOR_WRITEMASK- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_COMPILE_AND_EXECUTE
constantintGL.GL_COMPILE_AND_EXECUTE- Description
Used in
glNewListandglEndList
- ConstantGL_CONSTANT_ATTENUATION
constantintGL.GL_CONSTANT_ATTENUATION- Description
Used in
glGetLightandglLight
- ConstantGL_COPY
constantintGL.GL_COPY- Description
Used in
glGetIntegerv,glLogicOp,glGetBooleanv,glGetFloatv,glGetDoublevandglFeedbackBuffer
- ConstantGL_CULL_FACE
constantintGL.GL_CULL_FACE- Description
Used in
glIsEnabled,glGetIntegerv,glCullFace,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglFrontFace
- ConstantGL_CULL_FACE_MODE
constantintGL.GL_CULL_FACE_MODE- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_CURRENT_COLOR
constantintGL.GL_CURRENT_COLOR- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_INDEX
constantintGL.GL_CURRENT_INDEX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_NORMAL
constantintGL.GL_CURRENT_NORMAL- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_CURRENT_RASTER_COLOR
constantintGL.GL_CURRENT_RASTER_COLOR- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_RASTER_DISTANCE
constantintGL.GL_CURRENT_RASTER_DISTANCE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_RASTER_INDEX
constantintGL.GL_CURRENT_RASTER_INDEX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_RASTER_POSITION
constantintGL.GL_CURRENT_RASTER_POSITION- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_RASTER_POSITION_VALID
constantintGL.GL_CURRENT_RASTER_POSITION_VALID- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_RASTER_TEXTURE_COORDS
constantintGL.GL_CURRENT_RASTER_TEXTURE_COORDS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_CURRENT_TEXTURE_COORDS
constantintGL.GL_CURRENT_TEXTURE_COORDS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglRasterPos
- ConstantGL_DEPTH
constantintGL.GL_DEPTH- Description
Used in
glIsEnabled,glGetIntegerv,glDrawPixels,glDisable,glPopAttrib,glEnable,glPixelTransfer,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glCopyPixels,glDepthFunc,glTexImage1DandglClear
- ConstantGL_DEPTH_BIAS
constantintGL.GL_DEPTH_BIAS- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_DEPTH_BITS
constantintGL.GL_DEPTH_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_DEPTH_BUFFER_BIT
constantintGL.GL_DEPTH_BUFFER_BIT- Description
Used in
glPopAttrib,glPushAttribandglClear
- ConstantGL_DEPTH_CLEAR_VALUE
constantintGL.GL_DEPTH_CLEAR_VALUE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_DEPTH_COMPONENT
constantintGL.GL_DEPTH_COMPONENT- Description
Used in
glDrawPixels,glGetTexImage,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_DEPTH_FUNC
constantintGL.GL_DEPTH_FUNC- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_DEPTH_RANGE
constantintGL.GL_DEPTH_RANGE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_DEPTH_SCALE
constantintGL.GL_DEPTH_SCALE- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_DEPTH_TEST
constantintGL.GL_DEPTH_TEST- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglDepthFunc
- ConstantGL_DEPTH_WRITEMASK
constantintGL.GL_DEPTH_WRITEMASK- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_DIFFUSE
constantintGL.GL_DIFFUSE- Description
Used in
glColorMaterial,glGetLight,glMaterial,glLightandglGetMaterial
- ConstantGL_DITHER
constantintGL.GL_DITHER- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_DONT_CARE
constantintGL.GL_DONT_CARE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglHint
- ConstantGL_DOUBLE
constantintGL.GL_DOUBLE- Description
Used in
glGetIntegerv,glVertexPointer,glColorPointer,glNormalPointer,glGetBooleanv,glGetFloatv,glGetDoublev,glTexCoordPointerandglIndexPointer
- ConstantGL_DOUBLEBUFFER
constantintGL.GL_DOUBLEBUFFER- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_DRAW_BUFFER
constantintGL.GL_DRAW_BUFFER- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_EDGE_FLAG
constantintGL.GL_EDGE_FLAG- Description
Used in
glIsEnabled,glGetIntegerv,glPopAttrib,glEnableClientState,glGetPointerv,glGetBooleanv,glPushAttrib,glGetFloatv,glEdgeFlagPointer,glGetDoublevandglDisableClientState
- ConstantGL_EDGE_FLAG_ARRAY
constantintGL.GL_EDGE_FLAG_ARRAY- Description
Used in
glIsEnabled,glGetIntegerv,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glEdgeFlagPointer,glGetDoublevandglDisableClientState
- ConstantGL_EDGE_FLAG_ARRAY_POINTER
constantintGL.GL_EDGE_FLAG_ARRAY_POINTER- Description
Used in
glGetPointerv
- ConstantGL_EDGE_FLAG_ARRAY_STRIDE
constantintGL.GL_EDGE_FLAG_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_EMISSION
constantintGL.GL_EMISSION- Description
Used in
glColorMaterial,glMaterialandglGetMaterial
- ConstantGL_EQUAL
constantintGL.GL_EQUAL- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_EXP
constantintGL.GL_EXP- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FALSE
constantintGL.GL_FALSE- Description
Used in
glIsEnabled,glDepthMask,glIsList,glAreTexturesResident,glGetIntegerv,glIsTexture,glDisable,glEdgeFlag,glEnable,glColorMask,glGetBooleanv,glGetFloatv,glGetDoublevandglEdgeFlagv
- ConstantGL_FEEDBACK
constantintGL.GL_FEEDBACK- Description
Used in
glRenderMode,glPassThrough,glGetPointervandglFeedbackBuffer
- ConstantGL_FEEDBACK_BUFFER_POINTER
constantintGL.GL_FEEDBACK_BUFFER_POINTER- Description
Used in
glGetPointerv
- ConstantGL_FILL
constantintGL.GL_FILL- Description
Used in
glGetIntegerv,glDisable,glEnable,glPolygonMode,glGetBooleanv,glGetFloatv,glGetDoublevandglEvalMesh
- ConstantGL_FLOAT
constantintGL.GL_FLOAT- Description
Used in
glGetIntegerv,glDrawPixels,glVertexPointer,glColorPointer,glTexSubImage2D,glNormalPointer,glGetBooleanv,glGetTexImage,glGetFloatv,glGetDoublev,glCallLists,glReadPixels,glTexImage2D,glTexCoordPointer,glIndexPointer,glTexSubImage1DandglTexImage1D
- ConstantGL_FOG
constantintGL.GL_FOG- Description
Used in
glIsEnabled,glFog,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_FOG_COLOR
constantintGL.GL_FOG_COLOR- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FOG_DENSITY
constantintGL.GL_FOG_DENSITY- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FOG_END
constantintGL.GL_FOG_END- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FOG_HINT
constantintGL.GL_FOG_HINT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_FOG_INDEX
constantintGL.GL_FOG_INDEX- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FOG_MODE
constantintGL.GL_FOG_MODE- Description
Used in
glFog,glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_FOG_START
constantintGL.GL_FOG_START- Description
Used in
glFog,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_FRONT
constantintGL.GL_FRONT- Description
Used in
glGetIntegerv,glColorMaterial,glCullFace,glPopAttrib,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glReadBuffer,glMaterial,glGetDoublev,glDrawBufferandglGetMaterial
- ConstantGL_FRONT_AND_BACK
constantintGL.GL_FRONT_AND_BACK- Description
Used in
glGetIntegerv,glColorMaterial,glCullFace,glPolygonMode,glGetBooleanv,glGetFloatv,glMaterial,glGetDoublevandglDrawBuffer
- ConstantGL_FRONT_FACE
constantintGL.GL_FRONT_FACE- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_FUNC_ADD_EXT
constantintGL.GL_FUNC_ADD_EXT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_GEQUAL
constantintGL.GL_GEQUAL- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_GREATER
constantintGL.GL_GREATER- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_GREEN
constantintGL.GL_GREEN- Description
Used in
glGetIntegerv,glDrawPixels,glTexSubImage2D,glPopAttrib,glPixelTransfer,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_GREEN_BIAS
constantintGL.GL_GREEN_BIAS- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_GREEN_BITS
constantintGL.GL_GREEN_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_GREEN_SCALE
constantintGL.GL_GREEN_SCALE- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_ARRAY
constantintGL.GL_INDEX_ARRAY- Description
Used in
glIsEnabled,glGetIntegerv,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glGetDoublev,glIndexPointerandglDisableClientState
- ConstantGL_INDEX_ARRAY_STRIDE
constantintGL.GL_INDEX_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_ARRAY_TYPE
constantintGL.GL_INDEX_ARRAY_TYPE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_BITS
constantintGL.GL_INDEX_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_CLEAR_VALUE
constantintGL.GL_INDEX_CLEAR_VALUE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_LOGIC_OP
constantintGL.GL_INDEX_LOGIC_OP- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glLogicOp,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_MODE
constantintGL.GL_INDEX_MODE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INDEX_OFFSET
constantintGL.GL_INDEX_OFFSET- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glCopyPixelsandglTexImage1D
- ConstantGL_INDEX_SHIFT
constantintGL.GL_INDEX_SHIFT- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glCopyPixelsandglTexImage1D
- ConstantGL_INDEX_WRITEMASK
constantintGL.GL_INDEX_WRITEMASK- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_INT
constantintGL.GL_INT- Description
Used in
glTexEnv,glDrawPixels,glVertexPointer,glColorPointer,glCopyTexImage1D,glTexSubImage2D,glNormalPointer,glGetTexImage,glCallLists,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexCoordPointer,glIndexPointer,glTexSubImage1DandglTexImage1D
- ConstantGL_INTENSITY
constantintGL.GL_INTENSITY- Description
Used in
glTexEnv,glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_INTENSITY12
constantintGL.GL_INTENSITY12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_INTENSITY16
constantintGL.GL_INTENSITY16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_INTENSITY4
constantintGL.GL_INTENSITY4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_INTENSITY8
constantintGL.GL_INTENSITY8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_INVALID_ENUM
constantintGL.GL_INVALID_ENUM- Description
Used in
glMatrixMode,glPixelStore,glIsEnabled,glGetTexLevelParameter,glFog,glTexEnv,glMap1,glRenderMode,glGetTexGen,glGetIntegerv,glEnd,glDrawElements,glDrawArrays,glCopyTexSubImage2D,glColorMaterial,glBindTexture,glGetClipPlane,glCullFace,glGetError,glClipPlane,glDrawPixels,glBlendFunc,glVertexPointer,glGetLight,glDisable,glMap2,glColorPointer,glCopyTexImage1D,glGetPixelMap,glTexSubImage2D,glNormalPointer,glEnable,glEnableClientState,glGetPointerv,glPixelTransfer,glPolygonMode,glGetTexParameter,glLogicOp,glGetBooleanv,glGetTexImage,glPixelMap,glGetFloatv,glGetMap,glAccum,glReadBuffer,glMaterial,glEdgeFlagPointer,glGetDoublev,glCallLists,glInterleavedArrays,glAlphaFunc,glShadeModel,glNewList,glReadPixels,glCopyTexImage2D,glTexImage2D,glGetTexEnv,glFeedbackBuffer,glEndList,glBegin,glLight,glStencilOp,glTexCoordPointer,glCopyPixels,glDepthFunc,glLightModel,glIndexPointer,glGetString,glTexParameter,glDisableClientState,glTexSubImage1D,glDrawBuffer,glHint,glTexImage1D,glStencilFunc,glGetMaterial,glCopyTexSubImage1D,glFrontFace,glEvalMeshandglTexGen
- ConstantGL_INVALID_OPERATION
constantintGL.GL_INVALID_OPERATION- Description
Used in
glPolygonOffset,glPushMatrix,glMatrixMode,glLoadName,glPixelStore,glIsEnabled,glGetTexLevelParameter,glGenTextures,glFog,glTexEnv,glClearColor,glMap1,glPrioritizeTextures,glDepthMask,glPushName,glRenderMode,glMultMatrix,glIsList,glFrustum,glDepthRange,glAreTexturesResident,glDeleteTextures,glGetTexGen,glGetIntegerv,glEnd,glIsTexture,glDrawElements,glGenLists,glBlendColorEXT,glViewport,glDrawArrays,glCopyTexSubImage2D,glColorMaterial,glBindTexture,glGetClipPlane,glFinish,glCullFace,glGetError,glStencilMask,glClipPlane,glDrawPixels,glBlendFunc,glSelectBuffer,glGetLight,glInitNames,glPassThrough,glDisable,glMap2,glLineStipple,glCopyTexImage1D,glGetPixelMap,glTexSubImage2D,glPopAttrib,glEnable,glListBase,glColorMask,glPixelTransfer,glPolygonMode,glGetTexParameter,glPopName,glLogicOp,glIndexMask,glGetBooleanv,glGetTexImage,glPixelMap,glTranslate,glPushAttrib,glGetFloatv,glGetMap,glAccum,glReadBuffer,glGetDoublev,glClearDepth,glRasterPos,glAlphaFunc,glShadeModel,glNewList,glReadPixels,glCopyTexImage2D,glRect,glTexImage2D,glGetTexEnv,glClearIndex,glFeedbackBuffer,glRotate,glEndList,glBegin,glLight,glGetPolygonStipple,glStencilOp,glClearStencil,glBitmap,glScale,glCopyPixels,glFlush,glOrtho,glDepthFunc,glMapGrid,glLightModel,glGetString,glTexParameter,glScissor,glTexSubImage1D,glLoadIdentity,glPixelZoom,glDrawBuffer,glLineWidth,glHint,glTexImage1D,glStencilFunc,glGetMaterial,glClear,glCopyTexSubImage1D,glPopMatrix,glPointSize,glPolygonStipple,glFrontFace,glLoadMatrix,glEvalMesh,glTexGen,glClearAccumandglDeleteLists
- ConstantGL_INVALID_VALUE
constantintGL.GL_INVALID_VALUE- Description
Used in
glPixelStore,glGetTexLevelParameter,glGenTextures,glFog,glMap1,glPrioritizeTextures,glFrustum,glAreTexturesResident,glDeleteTextures,glDrawElements,glGenLists,glViewport,glDrawArrays,glCopyTexSubImage2D,glGetError,glDrawPixels,glVertexPointer,glSelectBuffer,glMap2,glColorPointer,glCopyTexImage1D,glTexSubImage2D,glNormalPointer,glGetTexImage,glPixelMap,glMaterial,glCallLists,glInterleavedArrays,glNewList,glReadPixels,glCopyTexImage2D,glTexImage2D,glFeedbackBuffer,glEndList,glLight,glBitmap,glTexCoordPointer,glCopyPixels,glMapGrid,glIndexPointer,glScissor,glTexSubImage1D,glLineWidth,glTexImage1D,glClear,glCopyTexSubImage1D,glPointSizeandglDeleteLists
- ConstantGL_KEEP
constantintGL.GL_KEEP- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglStencilOp
- ConstantGL_LEQUAL
constantintGL.GL_LEQUAL- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_LESS
constantintGL.GL_LESS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublev,glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_LIGHTING
constantintGL.GL_LIGHTING- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglLight
- ConstantGL_LIGHTING_BIT
constantintGL.GL_LIGHTING_BIT- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_LIGHT_MODEL_AMBIENT
constantintGL.GL_LIGHT_MODEL_AMBIENT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglLightModel
- ConstantGL_LIGHT_MODEL_LOCAL_VIEWER
constantintGL.GL_LIGHT_MODEL_LOCAL_VIEWER- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglLightModel
- ConstantGL_LIGHT_MODEL_TWO_SIDE
constantintGL.GL_LIGHT_MODEL_TWO_SIDE- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglLightModel
- ConstantGL_LINE
constantintGL.GL_LINE- Description
Used in
glIsEnabled,glFog,glGetIntegerv,glEnd,glDrawElements,glDrawArrays,glGetLight,glDisable,glLineStipple,glEdgeFlag,glPopAttrib,glEnable,glPolygonMode,glGetTexParameter,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glFeedbackBuffer,glBegin,glLight,glTexParameter,glLineWidth,glHint,glEdgeFlagvandglEvalMesh
- ConstantGL_LINEAR
constantintGL.GL_LINEAR- Description
Used in
glFog,glGetLight,glGetTexParameter,glLightandglTexParameter
- ConstantGL_LINEAR_ATTENUATION
constantintGL.GL_LINEAR_ATTENUATION- Description
Used in
glGetLightandglLight
- ConstantGL_LINEAR_MIPMAP_LINEAR
constantintGL.GL_LINEAR_MIPMAP_LINEAR- Description
Used in
glTexParameter
- ConstantGL_LINEAR_MIPMAP_NEAREST
constantintGL.GL_LINEAR_MIPMAP_NEAREST- Description
Used in
glTexParameter
- ConstantGL_LINES
constantintGL.GL_LINES- Description
Used in
glEnd,glDrawElements,glDrawArrays,glLineStipple,glBeginandglEvalMesh
- ConstantGL_LINE_LOOP
constantintGL.GL_LINE_LOOP- Description
Used in
glEnd,glDrawElements,glDrawArraysandglBegin
- ConstantGL_LINE_SMOOTH
constantintGL.GL_LINE_SMOOTH- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glLineWidthandglHint
- ConstantGL_LINE_SMOOTH_HINT
constantintGL.GL_LINE_SMOOTH_HINT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_LINE_STIPPLE
constantintGL.GL_LINE_STIPPLE- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glLineStipple,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_LINE_STIPPLE_PATTERN
constantintGL.GL_LINE_STIPPLE_PATTERN- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LINE_STIPPLE_REPEAT
constantintGL.GL_LINE_STIPPLE_REPEAT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LINE_STRIP
constantintGL.GL_LINE_STRIP- Description
Used in
glEnd,glDrawElements,glDrawArrays,glBeginandglEvalMesh
- ConstantGL_LINE_WIDTH
constantintGL.GL_LINE_WIDTH- Description
Used in
glGetIntegerv,glPolygonMode,glGetBooleanv,glGetFloatv,glGetDoublevandglLineWidth
- ConstantGL_LINE_WIDTH_GRANULARITY
constantintGL.GL_LINE_WIDTH_GRANULARITY- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglLineWidth
- ConstantGL_LINE_WIDTH_RANGE
constantintGL.GL_LINE_WIDTH_RANGE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglLineWidth
- ConstantGL_LIST_BASE
constantintGL.GL_LIST_BASE- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_LIST_INDEX
constantintGL.GL_LIST_INDEX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LIST_MODE
constantintGL.GL_LIST_MODE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LOGIC_OP
constantintGL.GL_LOGIC_OP- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LOGIC_OP_MODE
constantintGL.GL_LOGIC_OP_MODE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_LUMINANCE
constantintGL.GL_LUMINANCE- Description
Used in
glTexEnv,glDrawPixels,glCopyTexImage1D,glTexSubImage2D,glGetTexImage,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_LUMINANCE12
constantintGL.GL_LUMINANCE12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE12_ALPHA12
constantintGL.GL_LUMINANCE12_ALPHA12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE12_ALPHA4
constantintGL.GL_LUMINANCE12_ALPHA4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE16
constantintGL.GL_LUMINANCE16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE16_ALPHA16
constantintGL.GL_LUMINANCE16_ALPHA16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE4
constantintGL.GL_LUMINANCE4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE4_ALPHA4
constantintGL.GL_LUMINANCE4_ALPHA4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE6_ALPHA2
constantintGL.GL_LUMINANCE6_ALPHA2- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE8
constantintGL.GL_LUMINANCE8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE8_ALPHA8
constantintGL.GL_LUMINANCE8_ALPHA8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_LUMINANCE_ALPHA
constantintGL.GL_LUMINANCE_ALPHA- Description
Used in
glDrawPixels,glCopyTexImage1D,glTexSubImage2D,glGetTexImage,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_MAP1_COLOR_4
constantintGL.GL_MAP1_COLOR_4- Description
Used in
glIsEnabled,glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_GRID_DOMAIN
constantintGL.GL_MAP1_GRID_DOMAIN- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAP1_GRID_SEGMENTS
constantintGL.GL_MAP1_GRID_SEGMENTS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAP1_INDEX
constantintGL.GL_MAP1_INDEX- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_NORMAL
constantintGL.GL_MAP1_NORMAL- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_TEXTURE_COORD_1
constantintGL.GL_MAP1_TEXTURE_COORD_1- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_TEXTURE_COORD_2
constantintGL.GL_MAP1_TEXTURE_COORD_2- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_TEXTURE_COORD_3
constantintGL.GL_MAP1_TEXTURE_COORD_3- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_TEXTURE_COORD_4
constantintGL.GL_MAP1_TEXTURE_COORD_4- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_VERTEX_3
constantintGL.GL_MAP1_VERTEX_3- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP1_VERTEX_4
constantintGL.GL_MAP1_VERTEX_4- Description
Used in
glMap1,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_COLOR_4
constantintGL.GL_MAP2_COLOR_4- Description
Used in
glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_GRID_DOMAIN
constantintGL.GL_MAP2_GRID_DOMAIN- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAP2_GRID_SEGMENTS
constantintGL.GL_MAP2_GRID_SEGMENTS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAP2_INDEX
constantintGL.GL_MAP2_INDEX- Description
Used in
glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_NORMAL
constantintGL.GL_MAP2_NORMAL- Description
Used in
glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_TEXTURE_COORD_1
constantintGL.GL_MAP2_TEXTURE_COORD_1- Description
Used in
glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_TEXTURE_COORD_2
constantintGL.GL_MAP2_TEXTURE_COORD_2- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_TEXTURE_COORD_3
constantintGL.GL_MAP2_TEXTURE_COORD_3- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_TEXTURE_COORD_4
constantintGL.GL_MAP2_TEXTURE_COORD_4- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_VERTEX_3
constantintGL.GL_MAP2_VERTEX_3- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP2_VERTEX_4
constantintGL.GL_MAP2_VERTEX_4- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glMap2,glEnable,glGetBooleanv,glGetFloatv,glGetMap,glGetDoublevandglEvalCoord
- ConstantGL_MAP_COLOR
constantintGL.GL_MAP_COLOR- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_MAP_STENCIL
constantintGL.GL_MAP_STENCIL- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_MATRIX_MODE
constantintGL.GL_MATRIX_MODE- Description
Used in
glMatrixMode,glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_MAX_ATTRIB_STACK_DEPTH
constantintGL.GL_MAX_ATTRIB_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_CLIENT_ATTRIB_STACK_DEPTH
constantintGL.GL_MAX_CLIENT_ATTRIB_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_CLIP_PLANES
constantintGL.GL_MAX_CLIP_PLANES- Description
Used in
glGetIntegerv,glGetClipPlane,glClipPlane,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_EVAL_ORDER
constantintGL.GL_MAX_EVAL_ORDER- Description
Used in
glMap1,glGetIntegerv,glMap2,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_EXT
constantintGL.GL_MAX_EXT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_LIGHTS
constantintGL.GL_MAX_LIGHTS- Description
Used in
glGetIntegerv,glGetLight,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglLight
- ConstantGL_MAX_LIST_NESTING
constantintGL.GL_MAX_LIST_NESTING- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_MODELVIEW_STACK_DEPTH
constantintGL.GL_MAX_MODELVIEW_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_NAME_STACK_DEPTH
constantintGL.GL_MAX_NAME_STACK_DEPTH- Description
Used in
glPushName,glGetIntegerv,glPopName,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_PIXEL_MAP_TABLE
constantintGL.GL_MAX_PIXEL_MAP_TABLE- Description
Used in
glGetIntegerv,glGetBooleanv,glPixelMap,glGetFloatvandglGetDoublev
- ConstantGL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT
constantintGL.GL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT
- ConstantGL_MAX_PROJECTION_STACK_DEPTH
constantintGL.GL_MAX_PROJECTION_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_TEXTURE_SIZE
constantintGL.GL_MAX_TEXTURE_SIZE- Description
Used in
glGetTexLevelParameter,glGetIntegerv,glCopyTexSubImage2D,glCopyTexImage1D,glTexSubImage2D,glGetBooleanv,glGetTexImage,glGetFloatv,glGetDoublev,glCopyTexImage2D,glTexImage2D,glTexSubImage1D,glTexImage1DandglCopyTexSubImage1D
- ConstantGL_MAX_TEXTURE_STACK_DEPTH
constantintGL.GL_MAX_TEXTURE_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MAX_VIEWPORT_DIMS
constantintGL.GL_MAX_VIEWPORT_DIMS- Description
Used in
glGetIntegerv,glViewport,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MIN_EXT
constantintGL.GL_MIN_EXT- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MODELVIEW
constantintGL.GL_MODELVIEW- Description
Used in
glPushMatrix,glMatrixMode,glGetIntegerv,glGetBooleanv,glTranslate,glGetFloatv,glGetDoublev,glRotate,glScaleandglPopMatrix
- ConstantGL_MODELVIEW_MATRIX
constantintGL.GL_MODELVIEW_MATRIX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_MODELVIEW_STACK_DEPTH
constantintGL.GL_MODELVIEW_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_NAME_STACK_DEPTH
constantintGL.GL_NAME_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_NEAREST_MIPMAP_LINEAR
constantintGL.GL_NEAREST_MIPMAP_LINEAR- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_NEAREST_MIPMAP_NEAREST
constantintGL.GL_NEAREST_MIPMAP_NEAREST- Description
Used in
glTexParameter
- ConstantGL_NEVER
constantintGL.GL_NEVER- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_NOR
constantintGL.GL_NOR- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glNormalPointer,glPopAttrib,glEnable,glEnableClientState,glGetPointerv,glLogicOp,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glNormalandglDisableClientState
- ConstantGL_NORMALIZE
constantintGL.GL_NORMALIZE- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglNormal
- ConstantGL_NORMAL_ARRAY
constantintGL.GL_NORMAL_ARRAY- Description
Used in
glIsEnabled,glGetIntegerv,glNormalPointer,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glGetDoublevandglDisableClientState
- ConstantGL_NORMAL_ARRAY_POINTER
constantintGL.GL_NORMAL_ARRAY_POINTER- Description
Used in
glGetPointerv
- ConstantGL_NORMAL_ARRAY_STRIDE
constantintGL.GL_NORMAL_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_NORMAL_ARRAY_TYPE
constantintGL.GL_NORMAL_ARRAY_TYPE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_NOTEQUAL
constantintGL.GL_NOTEQUAL- Description
Used in
glAlphaFunc,glDepthFuncandglStencilFunc
- ConstantGL_ONE
constantintGL.GL_ONE- Description
Used in
glGetIntegerv,glBlendFunc,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_OUT_OF_MEMORY
constantintGL.GL_OUT_OF_MEMORY- Description
Used in
glGetError,glNewListandglEndList
- ConstantGL_PACK_ALIGNMENT
constantintGL.GL_PACK_ALIGNMENT- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetTexImage,glGetFloatvandglGetDoublev
- ConstantGL_PACK_LSB_FIRST
constantintGL.GL_PACK_LSB_FIRST- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglReadPixels
- ConstantGL_PACK_ROW_LENGTH
constantintGL.GL_PACK_ROW_LENGTH- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PACK_SKIP_PIXELS
constantintGL.GL_PACK_SKIP_PIXELS- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PACK_SKIP_ROWS
constantintGL.GL_PACK_SKIP_ROWS- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PACK_SWAP_BYTES
constantintGL.GL_PACK_SWAP_BYTES- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglReadPixels
- ConstantGL_PASS_THROUGH_TOKEN
constantintGL.GL_PASS_THROUGH_TOKEN- Description
Used in
glPassThroughandglFeedbackBuffer
- ConstantGL_PERSPECTIVE_CORRECTION_HINT
constantintGL.GL_PERSPECTIVE_CORRECTION_HINT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_PIXEL_MAP_A_TO_A
constantintGL.GL_PIXEL_MAP_A_TO_A- Description
Used in
glGetIntegerv,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_A_TO_A_SIZE
constantintGL.GL_PIXEL_MAP_A_TO_A_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_B_TO_B
constantintGL.GL_PIXEL_MAP_B_TO_B- Description
Used in
glGetIntegerv,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_B_TO_B_SIZE
constantintGL.GL_PIXEL_MAP_B_TO_B_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_G_TO_G
constantintGL.GL_PIXEL_MAP_G_TO_G- Description
Used in
glGetIntegerv,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_G_TO_G_SIZE
constantintGL.GL_PIXEL_MAP_G_TO_G_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_I_TO_A
constantintGL.GL_PIXEL_MAP_I_TO_A- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_PIXEL_MAP_I_TO_A_SIZE
constantintGL.GL_PIXEL_MAP_I_TO_A_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_I_TO_B
constantintGL.GL_PIXEL_MAP_I_TO_B- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_PIXEL_MAP_I_TO_B_SIZE
constantintGL.GL_PIXEL_MAP_I_TO_B_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_I_TO_G
constantintGL.GL_PIXEL_MAP_I_TO_G- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_PIXEL_MAP_I_TO_G_SIZE
constantintGL.GL_PIXEL_MAP_I_TO_G_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_I_TO_I
constantintGL.GL_PIXEL_MAP_I_TO_I- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_PIXEL_MAP_I_TO_I_SIZE
constantintGL.GL_PIXEL_MAP_I_TO_I_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_I_TO_R
constantintGL.GL_PIXEL_MAP_I_TO_R- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_PIXEL_MAP_I_TO_R_SIZE
constantintGL.GL_PIXEL_MAP_I_TO_R_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_R_TO_R
constantintGL.GL_PIXEL_MAP_R_TO_R- Description
Used in
glGetIntegerv,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_R_TO_R_SIZE
constantintGL.GL_PIXEL_MAP_R_TO_R_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MAP_S_TO_S
constantintGL.GL_PIXEL_MAP_S_TO_S- Description
Used in
glGetIntegerv,glDrawPixels,glGetPixelMap,glPixelTransfer,glGetBooleanv,glPixelMap,glGetFloatv,glGetDoublev,glReadPixelsandglCopyPixels
- ConstantGL_PIXEL_MAP_S_TO_S_SIZE
constantintGL.GL_PIXEL_MAP_S_TO_S_SIZE- Description
Used in
glGetIntegerv,glPixelTransfer,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PIXEL_MODE_BIT
constantintGL.GL_PIXEL_MODE_BIT- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_POINT
constantintGL.GL_POINT- Description
Used in
glIsEnabled,glGetIntegerv,glEnd,glDrawElements,glDrawArrays,glDisable,glEdgeFlag,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glFeedbackBuffer,glBegin,glHint,glEdgeFlagv,glPointSizeandglEvalMesh
- ConstantGL_POINTS
constantintGL.GL_POINTS- Description
Used in
glEnd,glDrawElements,glDrawArrays,glBeginandglEvalMesh
- ConstantGL_POINT_SIZE
constantintGL.GL_POINT_SIZE- Description
Used in
glGetIntegerv,glPolygonMode,glGetBooleanv,glGetFloatv,glGetDoublevandglPointSize
- ConstantGL_POINT_SIZE_GRANULARITY
constantintGL.GL_POINT_SIZE_GRANULARITY- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglPointSize
- ConstantGL_POINT_SIZE_RANGE
constantintGL.GL_POINT_SIZE_RANGE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglPointSize
- ConstantGL_POINT_SMOOTH
constantintGL.GL_POINT_SMOOTH- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glHintandglPointSize
- ConstantGL_POINT_SMOOTH_HINT
constantintGL.GL_POINT_SMOOTH_HINT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_POLYGON
constantintGL.GL_POLYGON- Description
Used in
glPolygonOffset,glIsEnabled,glGetIntegerv,glEnd,glDrawElements,glDrawArrays,glDisable,glEdgeFlag,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glRect,glFeedbackBuffer,glBegin,glHint,glEdgeFlagvandglPolygonStipple
- ConstantGL_POLYGON_MODE
constantintGL.GL_POLYGON_MODE- Description
Used in
glGetIntegerv,glEdgeFlag,glPopAttrib,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglEdgeFlagv
- ConstantGL_POLYGON_OFFSET_FACTOR
constantintGL.GL_POLYGON_OFFSET_FACTOR- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_POLYGON_OFFSET_FILL
constantintGL.GL_POLYGON_OFFSET_FILL- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_POLYGON_OFFSET_LINE
constantintGL.GL_POLYGON_OFFSET_LINE- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_POLYGON_OFFSET_POINT
constantintGL.GL_POLYGON_OFFSET_POINT- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_POLYGON_OFFSET_UNITS
constantintGL.GL_POLYGON_OFFSET_UNITS- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_POLYGON_SMOOTH
constantintGL.GL_POLYGON_SMOOTH- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_POLYGON_SMOOTH_HINT
constantintGL.GL_POLYGON_SMOOTH_HINT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglHint
- ConstantGL_POLYGON_STIPPLE
constantintGL.GL_POLYGON_STIPPLE- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glPolygonMode,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglPolygonStipple
- ConstantGL_POLYGON_STIPPLE_BIT
constantintGL.GL_POLYGON_STIPPLE_BIT- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_PROJECTION
constantintGL.GL_PROJECTION- Description
Used in
glPushMatrix,glMatrixMode,glFrustum,glGetIntegerv,glGetBooleanv,glTranslate,glGetFloatv,glGetDoublev,glRotate,glScale,glOrthoandglPopMatrix
- ConstantGL_PROJECTION_MATRIX
constantintGL.GL_PROJECTION_MATRIX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PROJECTION_STACK_DEPTH
constantintGL.GL_PROJECTION_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_PROXY_PIXEL_TRANSFORM_COLOR_TABLE_EXT
constantintGL.GL_PROXY_PIXEL_TRANSFORM_COLOR_TABLE_EXT
- ConstantGL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI
constantintGL.GL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI
- ConstantGL_PROXY_TEXTURE_1D
constantintGL.GL_PROXY_TEXTURE_1D- Description
Used in
glGetTexLevelParameter,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublev,glNewList,glEndListandglTexImage1D
- ConstantGL_PROXY_TEXTURE_2D
constantintGL.GL_PROXY_TEXTURE_2D- Description
Used in
glGetTexLevelParameter,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublev,glNewList,glTexImage2DandglEndList
- ConstantGL_Q
constantintGL.GL_Q- Description
Used in
glGetTexGen,glEnd,glDrawElements,glDrawArrays,glGetLight,glBegin,glLight,glEvalMeshandglTexGen
- ConstantGL_QUADRATIC_ATTENUATION
constantintGL.GL_QUADRATIC_ATTENUATION- Description
Used in
glGetLightandglLight
- ConstantGL_QUADS
constantintGL.GL_QUADS- Description
Used in
glEnd,glDrawElements,glDrawArraysandglBegin
- ConstantGL_QUAD_STRIP
constantintGL.GL_QUAD_STRIP- Description
Used in
glEnd,glDrawElements,glDrawArrays,glBeginandglEvalMesh
- ConstantGL_R
constantintGL.GL_R- Description
Used in
glPixelStore,glTexEnv,glRenderMode,glGetTexGen,glGetIntegerv,glCopyTexSubImage2D,glDrawPixels,glCopyTexImage1D,glTexSubImage2D,glPopAttrib,glPixelTransfer,glGetTexParameter,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glAccum,glReadBuffer,glGetDoublev,glReadPixels,glCopyTexImage2D,glTexImage2D,glStencilOp,glGetString,glTexParameter,glTexSubImage1D,glDrawBuffer,glTexImage1D,glCopyTexSubImage1DandglTexGen
- ConstantGL_R3_G3_B2
constantintGL.GL_R3_G3_B2- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_READ_BUFFER
constantintGL.GL_READ_BUFFER- Description
Used in
glGetIntegerv,glCopyTexSubImage2D,glCopyTexImage1D,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glCopyTexImage2DandglCopyTexSubImage1D
- ConstantGL_RED
constantintGL.GL_RED- Description
Used in
glGetIntegerv,glDrawPixels,glTexSubImage2D,glPopAttrib,glPixelTransfer,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_RED_BIAS
constantintGL.GL_RED_BIAS- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_RED_BITS
constantintGL.GL_RED_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_RED_SCALE
constantintGL.GL_RED_SCALE- Description
Used in
glGetIntegerv,glPopAttrib,glPixelTransfer,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_RENDER
constantintGL.GL_RENDER- Description
Used in
glRenderMode,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglGetString
- ConstantGL_RENDER_MODE
constantintGL.GL_RENDER_MODE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_RGB
constantintGL.GL_RGB- Description
Used in
glPixelStore,glTexEnv,glGetIntegerv,glDrawPixels,glCopyTexImage1D,glTexSubImage2D,glGetBooleanv,glGetTexImage,glGetFloatv,glGetDoublev,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_RGB10
constantintGL.GL_RGB10- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB10_A2
constantintGL.GL_RGB10_A2- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB12
constantintGL.GL_RGB12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB16
constantintGL.GL_RGB16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB4
constantintGL.GL_RGB4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB5
constantintGL.GL_RGB5- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB5_A1
constantintGL.GL_RGB5_A1- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGB8
constantintGL.GL_RGB8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA
constantintGL.GL_RGBA- Description
Used in
glTexEnv,glGetIntegerv,glDrawPixels,glCopyTexImage1D,glTexSubImage2D,glGetBooleanv,glGetTexImage,glGetFloatv,glGetDoublev,glReadPixels,glCopyTexImage2D,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_RGBA12
constantintGL.GL_RGBA12- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA16
constantintGL.GL_RGBA16- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA2
constantintGL.GL_RGBA2- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA4
constantintGL.GL_RGBA4- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA8
constantintGL.GL_RGBA8- Description
Used in
glCopyTexImage1D,glCopyTexImage2D,glTexImage2DandglTexImage1D
- ConstantGL_RGBA_MODE
constantintGL.GL_RGBA_MODE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_S
constantintGL.GL_S- Description
Used in
glPushMatrix,glLoadName,glIsEnabled,glPushName,glRenderMode,glGetTexGen,glGetIntegerv,glColorMaterial,glGetError,glDrawPixels,glBlendFunc,glVertexPointer,glSelectBuffer,glGetLight,glInitNames,glDisable,glColorPointer,glTexSubImage2D,glNormalPointer,glPopAttrib,glEnable,glGetPointerv,glPopName,glLogicOp,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glMaterial,glGetDoublev,glCallLists,glShadeModel,glReadPixels,glTexImage2D,glLight,glPopClientAttrib,glStencilOp,glTexCoordPointer,glCopyPixels,glIndexPointer,glPushClientAttrib,glScissor,glTexSubImage1D,glTexImage1D,glStencilFunc,glGetMaterial,glClear,glPopMatrixandglTexGen
- ConstantGL_SCISSOR_BOX
constantintGL.GL_SCISSOR_BOX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_SCISSOR_TEST
constantintGL.GL_SCISSOR_TEST- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglScissor
- ConstantGL_SELECT
constantintGL.GL_SELECT- Description
Used in
glLoadName,glPushName,glRenderMode,glSelectBuffer,glInitNames,glGetPointervandglPopName
- ConstantGL_SELECTION_BUFFER_POINTER
constantintGL.GL_SELECTION_BUFFER_POINTER- Description
Used in
glGetPointerv
- ConstantGL_SHADE_MODEL
constantintGL.GL_SHADE_MODEL- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_SHORT
constantintGL.GL_SHORT- Description
Used in
glDrawPixels,glVertexPointer,glColorPointer,glTexSubImage2D,glNormalPointer,glGetTexImage,glCallLists,glReadPixels,glTexImage2D,glTexCoordPointer,glIndexPointer,glTexSubImage1DandglTexImage1D
- ConstantGL_SMOOTH
constantintGL.GL_SMOOTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglShadeModel
- ConstantGL_SPECULAR
constantintGL.GL_SPECULAR- Description
Used in
glColorMaterial,glGetLight,glMaterial,glLightandglGetMaterial
- ConstantGL_STACK_OVERFLOW
constantintGL.GL_STACK_OVERFLOW- Description
Used in
glPushMatrix,glPushName,glGetError,glPopAttrib,glPopName,glPushAttrib,glPopClientAttrib,glPushClientAttribandglPopMatrix
- ConstantGL_STACK_UNDERFLOW
constantintGL.GL_STACK_UNDERFLOW- Description
Used in
glPushMatrix,glPushName,glGetError,glPopAttrib,glPopName,glPushAttrib,glPopClientAttrib,glPushClientAttribandglPopMatrix
- ConstantGL_STENCIL
constantintGL.GL_STENCIL- Description
Used in
glIsEnabled,glGetIntegerv,glDrawPixels,glDisable,glPopAttrib,glEnable,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glReadPixels,glTexImage2D,glStencilOp,glCopyPixels,glTexImage1D,glStencilFuncandglClear
- ConstantGL_STENCIL_BITS
constantintGL.GL_STENCIL_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglStencilOp
- ConstantGL_STENCIL_BUFFER_BIT
constantintGL.GL_STENCIL_BUFFER_BIT- Description
Used in
glPopAttrib,glPushAttribandglClear
- ConstantGL_STENCIL_CLEAR_VALUE
constantintGL.GL_STENCIL_CLEAR_VALUE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_FAIL
constantintGL.GL_STENCIL_FAIL- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_FUNC
constantintGL.GL_STENCIL_FUNC- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_INDEX
constantintGL.GL_STENCIL_INDEX- Description
Used in
glDrawPixels,glGetTexImage,glReadPixels,glTexImage2DandglTexImage1D
- ConstantGL_STENCIL_PASS_DEPTH_FAIL
constantintGL.GL_STENCIL_PASS_DEPTH_FAIL- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_PASS_DEPTH_PASS
constantintGL.GL_STENCIL_PASS_DEPTH_PASS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_REF
constantintGL.GL_STENCIL_REF- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_TEST
constantintGL.GL_STENCIL_TEST- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glPopAttrib,glEnable,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublev,glStencilOpandglStencilFunc
- ConstantGL_STENCIL_VALUE_MASK
constantintGL.GL_STENCIL_VALUE_MASK- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STENCIL_WRITEMASK
constantintGL.GL_STENCIL_WRITEMASK- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_STEREO
constantintGL.GL_STEREO- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_SUBPIXEL_BITS
constantintGL.GL_SUBPIXEL_BITS- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_T
constantintGL.GL_T- Description
Used in
glPushMatrix,glMatrixMode,glIsEnabled,glGetTexLevelParameter,glTexEnv,glIsList,glAreTexturesResident,glGetTexGen,glGetIntegerv,glEnd,glIsTexture,glDrawElements,glDrawArrays,glCopyTexSubImage2D,glBindTexture,glDisable,glCopyTexImage1D,glTexSubImage2D,glEdgeFlag,glPopAttrib,glEnable,glColorMask,glEnableClientState,glGetPointerv,glGetTexParameter,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glInterleavedArrays,glReadPixels,glCopyTexImage2D,glTexImage2D,glGetTexEnv,glBegin,glTexCoordPointer,glTexParameter,glDisableClientState,glTexSubImage1D,glEdgeFlagv,glTexImage1D,glCopyTexSubImage1D,glPopMatrixandglTexGen
- ConstantGL_TEXTURE
constantintGL.GL_TEXTURE- Description
Used in
glPushMatrix,glMatrixMode,glIsEnabled,glGetTexLevelParameter,glTexEnv,glAreTexturesResident,glGetTexGen,glGetIntegerv,glCopyTexSubImage2D,glBindTexture,glDisable,glCopyTexImage1D,glTexSubImage2D,glPopAttrib,glEnable,glEnableClientState,glGetPointerv,glGetTexParameter,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glCopyTexImage2D,glTexImage2D,glGetTexEnv,glTexCoordPointer,glTexParameter,glDisableClientState,glTexSubImage1D,glTexImage1D,glCopyTexSubImage1D,glPopMatrixandglTexGen
- ConstantGL_TEXTURE_1D
constantintGL.GL_TEXTURE_1D- Description
Used in
glIsEnabled,glGetTexLevelParameter,glGetIntegerv,glBindTexture,glDisable,glCopyTexImage1D,glPopAttrib,glEnable,glGetTexParameter,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glTexParameter,glTexSubImage1D,glTexImage1DandglCopyTexSubImage1D
- ConstantGL_TEXTURE_2D
constantintGL.GL_TEXTURE_2D- Description
Used in
glIsEnabled,glGetTexLevelParameter,glGetIntegerv,glCopyTexSubImage2D,glBindTexture,glDisable,glTexSubImage2D,glPopAttrib,glEnable,glGetTexParameter,glGetBooleanv,glGetTexImage,glPushAttrib,glGetFloatv,glGetDoublev,glCopyTexImage2D,glTexImage2DandglTexParameter
- ConstantGL_TEXTURE_ALPHA_SIZE
constantintGL.GL_TEXTURE_ALPHA_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_BLUE_SIZE
constantintGL.GL_TEXTURE_BLUE_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_BORDER
constantintGL.GL_TEXTURE_BORDER- Description
Used in
glGetTexLevelParameter,glCopyTexSubImage2D,glGetTexParameter,glTexParameter,glTexSubImage1DandglCopyTexSubImage1D
- ConstantGL_TEXTURE_BORDER_COLOR
constantintGL.GL_TEXTURE_BORDER_COLOR- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TEXTURE_COORD_ARRAY
constantintGL.GL_TEXTURE_COORD_ARRAY- Description
Used in
glIsEnabled,glGetIntegerv,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glGetDoublev,glTexCoordPointerandglDisableClientState
- ConstantGL_TEXTURE_COORD_ARRAY_POINTER
constantintGL.GL_TEXTURE_COORD_ARRAY_POINTER- Description
Used in
glGetPointerv
- ConstantGL_TEXTURE_COORD_ARRAY_SIZE
constantintGL.GL_TEXTURE_COORD_ARRAY_SIZE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_TEXTURE_COORD_ARRAY_STRIDE
constantintGL.GL_TEXTURE_COORD_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_TEXTURE_COORD_ARRAY_TYPE
constantintGL.GL_TEXTURE_COORD_ARRAY_TYPE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_TEXTURE_ENV_COLOR
constantintGL.GL_TEXTURE_ENV_COLOR- Description
Used in
glTexEnvandglGetTexEnv
- ConstantGL_TEXTURE_ENV_MODE
constantintGL.GL_TEXTURE_ENV_MODE- Description
Used in
glTexEnvandglGetTexEnv
- ConstantGL_TEXTURE_GEN_MODE
constantintGL.GL_TEXTURE_GEN_MODE- Description
Used in
glGetTexGen,glPopAttrib,glPushAttribandglTexGen
- ConstantGL_TEXTURE_GEN_Q
constantintGL.GL_TEXTURE_GEN_Q- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetDoublevandglTexGen
- ConstantGL_TEXTURE_GEN_R
constantintGL.GL_TEXTURE_GEN_R- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetDoublevandglTexGen
- ConstantGL_TEXTURE_GEN_S
constantintGL.GL_TEXTURE_GEN_S- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetDoublevandglTexGen
- ConstantGL_TEXTURE_GEN_T
constantintGL.GL_TEXTURE_GEN_T- Description
Used in
glIsEnabled,glGetIntegerv,glDisable,glEnable,glGetBooleanv,glGetFloatv,glGetDoublevandglTexGen
- ConstantGL_TEXTURE_GREEN_SIZE
constantintGL.GL_TEXTURE_GREEN_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_HEIGHT
constantintGL.GL_TEXTURE_HEIGHT- Description
Used in
glGetTexLevelParameter,glCopyTexSubImage2DandglTexSubImage2D
- ConstantGL_TEXTURE_INTENSITY_SIZE
constantintGL.GL_TEXTURE_INTENSITY_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_INTERNAL_FORMAT
constantintGL.GL_TEXTURE_INTERNAL_FORMAT- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_LUMINANCE_SIZE
constantintGL.GL_TEXTURE_LUMINANCE_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_MAG_FILTER
constantintGL.GL_TEXTURE_MAG_FILTER- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TEXTURE_MATRIX
constantintGL.GL_TEXTURE_MATRIX- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_TEXTURE_MIN_FILTER
constantintGL.GL_TEXTURE_MIN_FILTER- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TEXTURE_PRIORITY
constantintGL.GL_TEXTURE_PRIORITY- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TEXTURE_RED_SIZE
constantintGL.GL_TEXTURE_RED_SIZE- Description
Used in
glGetTexLevelParameter
- ConstantGL_TEXTURE_RESIDENT
constantintGL.GL_TEXTURE_RESIDENT- Description
Used in
glAreTexturesResidentandglGetTexParameter
- ConstantGL_TEXTURE_STACK_DEPTH
constantintGL.GL_TEXTURE_STACK_DEPTH- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_TEXTURE_WIDTH
constantintGL.GL_TEXTURE_WIDTH- Description
Used in
glGetTexLevelParameter,glCopyTexSubImage2D,glTexSubImage2D,glTexSubImage1DandglCopyTexSubImage1D
- ConstantGL_TEXTURE_WRAP_S
constantintGL.GL_TEXTURE_WRAP_S- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TEXTURE_WRAP_T
constantintGL.GL_TEXTURE_WRAP_T- Description
Used in
glGetTexParameterandglTexParameter
- ConstantGL_TRANSFORM_BIT
constantintGL.GL_TRANSFORM_BIT- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_TRIANGLES
constantintGL.GL_TRIANGLES- Description
Used in
glEnd,glDrawElements,glDrawArraysandglBegin
- ConstantGL_TRIANGLE_FAN
constantintGL.GL_TRIANGLE_FAN- Description
Used in
glEnd,glDrawElements,glDrawArraysandglBegin
- ConstantGL_TRIANGLE_STRIP
constantintGL.GL_TRIANGLE_STRIP- Description
Used in
glEnd,glDrawElements,glDrawArraysandglBegin
- ConstantGL_TRUE
constantintGL.GL_TRUE- Description
Used in
glIsEnabled,glIsList,glAreTexturesResident,glGetIntegerv,glIsTexture,glDisable,glEdgeFlag,glEnable,glColorMask,glGetTexParameter,glGetBooleanv,glGetFloatv,glGetDoublev,glReadPixelsandglEdgeFlagv
- ConstantGL_UNPACK_ALIGNMENT
constantintGL.GL_UNPACK_ALIGNMENT- Description
Used in
glPixelStore,glGetIntegerv,glDrawPixels,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_UNPACK_LSB_FIRST
constantintGL.GL_UNPACK_LSB_FIRST- Description
Used in
glPixelStore,glGetIntegerv,glDrawPixels,glGetBooleanv,glGetFloatv,glGetDoublev,glTexImage2D,glTexImage1DandglPolygonStipple
- ConstantGL_UNPACK_ROW_LENGTH
constantintGL.GL_UNPACK_ROW_LENGTH- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_UNPACK_SKIP_PIXELS
constantintGL.GL_UNPACK_SKIP_PIXELS- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_UNPACK_SKIP_ROWS
constantintGL.GL_UNPACK_SKIP_ROWS- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_UNPACK_SWAP_BYTES
constantintGL.GL_UNPACK_SWAP_BYTES- Description
Used in
glPixelStore,glGetIntegerv,glGetBooleanv,glGetFloatv,glGetDoublevandglPolygonStipple
- ConstantGL_UNSIGNED_BYTE
constantintGL.GL_UNSIGNED_BYTE- Description
Used in
glDrawElements,glDrawPixels,glColorPointer,glTexSubImage2D,glGetTexImage,glCallLists,glReadPixels,glTexImage2D,glIndexPointer,glTexSubImage1DandglTexImage1D
- ConstantGL_UNSIGNED_INT
constantintGL.GL_UNSIGNED_INT- Description
Used in
glDrawElements,glDrawPixels,glColorPointer,glTexSubImage2D,glGetTexImage,glCallLists,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_UNSIGNED_SHORT
constantintGL.GL_UNSIGNED_SHORT- Description
Used in
glDrawElements,glDrawPixels,glColorPointer,glTexSubImage2D,glGetTexImage,glCallLists,glReadPixels,glTexImage2D,glTexSubImage1DandglTexImage1D
- ConstantGL_VERTEX_ARRAY
constantintGL.GL_VERTEX_ARRAY- Description
Used in
glIsEnabled,glArrayElement,glGetIntegerv,glDrawElements,glDrawArrays,glVertexPointer,glEnableClientState,glGetPointerv,glGetBooleanv,glGetFloatv,glGetDoublevandglDisableClientState
- ConstantGL_VERTEX_ARRAY_POINTER
constantintGL.GL_VERTEX_ARRAY_POINTER- Description
Used in
glGetPointerv
- ConstantGL_VERTEX_ARRAY_SIZE
constantintGL.GL_VERTEX_ARRAY_SIZE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_VERTEX_ARRAY_STRIDE
constantintGL.GL_VERTEX_ARRAY_STRIDE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_VERTEX_ARRAY_TYPE
constantintGL.GL_VERTEX_ARRAY_TYPE- Description
Used in
glGetIntegerv,glGetBooleanv,glGetFloatvandglGetDoublev
- ConstantGL_VIEWPORT
constantintGL.GL_VIEWPORT- Description
Used in
glGetIntegerv,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatvandglGetDoublev
- ConstantGL_VIEWPORT_BIT
constantintGL.GL_VIEWPORT_BIT- Description
Used in
glPopAttribandglPushAttrib
- ConstantGL_ZERO
constantintGL.GL_ZERO- Description
Used in
glGetIntegerv,glBlendFunc,glGetBooleanv,glGetFloatv,glGetDoublevandglStencilOp
- ConstantGL_ZOOM_X
constantintGL.GL_ZOOM_X- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglCopyPixels
- ConstantGL_ZOOM_Y
constantintGL.GL_ZOOM_Y- Description
Used in
glGetIntegerv,glDrawPixels,glPopAttrib,glGetBooleanv,glPushAttrib,glGetFloatv,glGetDoublevandglCopyPixels
- MethodglAccum
voidglAccum(intop,floatvalue)- Description
The accumulation buffer is an extended-range color buffer. Images are not rendered into it. Rather, images rendered into one of the color buffers are added to the contents of the accumulation buffer after rendering. Effects such as antialiasing (of points, lines, and polygons), motion blur, and depth of field can be created by accumulating images generated with different transformation matrices.
Each pixel in the accumulation buffer consists of red, green, blue, and alpha values. The number of bits per component in the accumulation buffer depends on the implementation. You can examine this number by calling
glGetIntegervfour times, with argumentsGL_ACCUM_RED_BITS,GL_ACCUM_GREEN_BITS,GL_ACCUM_BLUE_BITS, andGL_ACCUM_ALPHA_BITS. Regardless of the number of bits per component, the range of values stored by each component is [-1, 1]. The accumulation buffer pixels are mapped one-to-one with frame buffer pixels.glAccumoperates on the accumulation buffer. The first argument, op, is a symbolic constant that selects an accumulation buffer operation. The second argument, value, is a floating-point value to be used in that operation. Five operations are specified:GL_ACCUM,GL_LOAD,GL_ADD,GL_MULT, andGL_RETURN.All accumulation buffer operations are limited to the area of the current scissor box and applied identically to the red, green, blue, and alpha components of each pixel. If a
glAccumoperation results in a value outside the range [-1, 1], the contents of an accumulation buffer pixel component are undefined.The operations are as follows:
GL_ACCUMObtains R, G, B, and A values from the buffer currently selected for reading (see glReadBuffer). Each component value is divided by 2n1, where n is the number of bits allocated to each color component in the currently selected buffer. The result is a floating-point value in the range [0, 1], which is multiplied by value and added to the corresponding pixel component in the accumulation buffer, thereby updating the accumulation buffer.GL_LOADSimilar to GL_ACCUM, except that the current value in the accumulation buffer is not used in the calculation of the new value. That is, the R, G, B, and A values from the currently selected buffer are divided by 2n1, multiplied by value, and then stored in the corresponding accumulation buffer cell, overwriting the current value.GL_ADDAdds value to each R, G, B, and A in the accumulation buffer. GL_MULTMultiplies each R, G, B, and A in the accumulation buffer by value and returns the scaled component to its corresponding accumulation buffer location. GL_RETURNTransfers accumulation buffer values to the color buffer or buffers currently selected for writing. Each R, G, B, and A component is multiplied by value, then multiplied by 2n1, clamped to the range [0, 2n1 ], and stored in the corresponding display buffer cell. The only fragment operations that are applied to this transfer are pixel ownership, scissor, dithering, and color writemasks. To clear the accumulation buffer, call
glClearAccumwith R, G, B, and A values to set it to, then callglClearwith the accumulation buffer enabled.- Parameter
op Specifies the accumulation buffer operation. Symbolic constants
GL_ACCUM,GL_LOAD,GL_ADD,GL_MULT, andGL_RETURNare accepted.- Parameter
value Specifies a floating-point value used in the accumulation buffer operation. op determines how value is used.
- Throws
GL_INVALID_ENUMis generated if op is not an accepted value.GL_INVALID_OPERATIONis generated if there is no accumulation buffer.GL_INVALID_OPERATIONis generated ifglAccumis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglAlphaFunc
voidglAlphaFunc(intfunc,floatref)- Description
The alpha test discards fragments depending on the outcome of a comparison between an incoming fragment's alpha value and a constant reference value.
glAlphaFuncspecifies the reference value and the comparison function. The comparison is performed only if alpha testing is enabled. By default, it is not enabled. (SeeglEnableandglDisableofGL_ALPHA_TEST.)func and ref specify the conditions under which the pixel is drawn. The incoming alpha value is compared to ref using the function specified by func. If the value passes the comparison, the incoming fragment is drawn if it also passes subsequent stencil and depth buffer tests. If the value fails the comparison, no change is made to the frame buffer at that pixel location. The comparison functions are as follows:
GL_NEVERNever passes. GL_LESSPasses if the incoming alpha value is less than the reference value. GL_EQUALPasses if the incoming alpha value is equal to the reference value. GL_LEQUALPasses if the incoming alpha value is less than or equal to the reference value. GL_GREATERPasses if the incoming alpha value is greater than the reference value. GL_NOTEQUALPasses if the incoming alpha value is not equal to the reference value. GL_GEQUALPasses if the incoming alpha value is greater than or equal to the reference value. GL_ALWAYSAlways passes (initial value). glAlphaFuncoperates on all pixel write operations, including those resulting from the scan conversion of points, lines, polygons, and bitmaps, and from pixel draw and copy operations.glAlphaFuncdoes not affect screen clear operations.- Parameter
func Specifies the alpha comparison function. Symbolic constants
GL_NEVER,GL_LESS,GL_EQUAL,GL_LEQUAL,GL_GREATER,GL_NOTEQUAL,GL_GEQUAL, andGL_ALWAYSare accepted. The initial value isGL_ALWAYS.- Parameter
ref Specifies the reference value that incoming alpha values are compared to. This value is clamped to the range 0 through 1, where 0 represents the lowest possible alpha value and 1 the highest possible value. The initial reference value is 0.
- Throws
GL_INVALID_ENUMis generated if func is not an accepted value.GL_INVALID_OPERATIONis generated ifglAlphaFuncis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglArrayElement
voidglArrayElement(inti)- Description
glArrayElementcommands are used withinglBegin/glEndpairs to specify vertex and attribute data for point, line, and polygon primitives. IfGL_VERTEX_ARRAYis enabled whenglArrayElementis called, a single vertex is drawn, using vertex and attribute data taken from location i of the enabled arrays. IfGL_VERTEX_ARRAYis not enabled, no drawing occurs but the attributes corresponding to the enabled arrays are modified.Use
glArrayElementto construct primitives by indexing vertex data, rather than by streaming through arrays of data in first-to-last order. Because each call specifies only a single vertex, it is possible to explicitly specify per-primitive attributes such as a single normal per individual triangle.Changes made to array data between the execution of
glBeginand the corresponding execution ofglEndmay affect calls toglArrayElementthat are made within the sameglBegin/glEndperiod in non-sequential ways. That is, a call toglArrayElementthat precedes a change to array data may access the changed data, and a call that follows a change to array data may access original data.- Parameter
i Specifies an index into the enabled vertex data arrays.
- MethodglBegin
voidglBegin(intmode)- Description
glBeginandglEnddelimit the vertices that define a primitive or a group of like primitives.glBeginaccepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows:GL_POINTSTreats each vertex as a single point. Vertex n defines point n. N points are drawn. GL_LINESTreats each pair of vertices as an independent line segment. Vertices 2n-1 and 2n define line n. N/2 lines are drawn. GL_LINE_STRIPDraws a connected group of line segments from the first vertex to the last. Vertices n and n+1 define line n. N-1 lines are drawn. GL_LINE_LOOPDraws a connected group of line segments from the first vertex to the last, then back to the first. Vertices n and n+1 define line n. The last line, however, is defined by vertices N and 1. N lines are drawn. GL_TRIANGLESTreats each triplet of vertices as an independent triangle. Vertices 3n-2, 3n-1, and 3n define triangle n. N/3 triangles are drawn. GL_TRIANGLE_STRIPDraws a connected group of triangles. One triangle is defined for each vertex presented after the first two vertices. For odd n, vertices n, n+1, and n+2 define triangle n. For even n, vertices n+1, n, and n+2 define triangle n. N-2 triangles are drawn. GL_TRIANGLE_FANDraws a connected group of triangles. One triangle is defined for each vertex presented after the first two vertices. Vertices 1, n+1, and n+2 define triangle n. N-2 triangles are drawn. GL_QUADSTreats each group of four vertices as an independent quadrilateral. Vertices 4n-3, 4n-2, 4n-1, and 4n define quadrilateral n. N/4 quadrilaterals are drawn. GL_QUAD_STRIPDraws a connected group of quadrilaterals. One quadrilateral is defined for each pair of vertices presented after the first pair. Vertices 2n-1, 2n, 2n+2, and 2n+1 define quadrilateral n. N/2-1 quadrilaterals are drawn. Note that the order in which vertices are used to construct a quadrilateral from strip data is different from that used with independent data. GL_POLYGONDraws a single, convex polygon. Vertices 1 through N define this polygon. Only a subset of GL commands can be used between
glBeginandglEnd. The commands areglVertex,glColor,glIndex,glNormal,glTexCoord,glEvalCoord,glEvalPoint,glArrayElement,glMaterial, andglEdgeFlag. Also, it is acceptable to useglCallListorglCallListsto execute display lists that include only the preceding commands. If any other GL command is executed betweenglBeginandglEnd, the error flag is set and the command is ignored.Regardless of the value chosen for mode, there is no limit to the number of vertices that can be defined between
glBeginandglEnd. Lines, triangles, quadrilaterals, and polygons that are incompletely specified are not drawn. Incomplete specification results when either too few vertices are provided to specify even a single primitive or when an incorrect multiple of vertices is specified. The incomplete primitive is ignored; the rest are drawn.The minimum specification of vertices for each primitive is as follows: 1 for a point, 2 for a line, 3 for a triangle, 4 for a quadrilateral, and 3 for a polygon. Modes that require a certain multiple of vertices are
GL_LINES(2),GL_TRIANGLES(3),GL_QUADS(4), andGL_QUAD_STRIP(2).- Parameter
mode Specifies the primitive or primitives that will be created from vertices presented between
glBeginand the subsequentglEnd. Ten symbolic constants are accepted:GL_POINTS,GL_LINES,GL_LINE_STRIP,GL_LINE_LOOP,GL_TRIANGLES,GL_TRIANGLE_STRIP,GL_TRIANGLE_FAN,GL_QUADS,GL_QUAD_STRIP, andGL_POLYGON.- Throws
GL_INVALID_ENUMis generated if mode is set to an unaccepted value.GL_INVALID_OPERATIONis generated ifglBeginis executed between aglBeginand the corresponding execution ofglEnd.GL_INVALID_OPERATIONis generated ifglEndis executed without being preceded by aglBegin.GL_INVALID_OPERATIONis generated if a command other thanglVertex,glColor,glIndex,glNormal,glTexCoord,glEvalCoord,glEvalPoint,glArrayElement,glMaterial,glEdgeFlag,glCallList, orglCallListsis executed between the execution ofglBeginand the corresponding executionglEnd.Execution of
glEnableClientState,glDisableClientState,glEdgeFlagPointer,glTexCoordPointer,glColorPointer,glIndexPointer,glNormalPointer,glVertexPointer,glInterleavedArrays, orglPixelStoreis not allowed after a call toglBeginand before the corresponding call toglEnd, but an error may or may not be generated.
- MethodglBindTexture
voidglBindTexture(inttarget,inttexture)- Description
glBindTexturelets you create or use a named texture. CallingglBindTexturewithtarget set to
GL_TEXTURE_1DorGL_TEXTURE_2Dand texture set to the name of the newtexture binds the texture name to the target. When a texture is bound to a target, the previous binding for that target is automatically broken.Texture names are unsigned integers. The value zero is reserved to represent the default texture for each texture target. Texture names and the corresponding texture contents are local to the shared display-list space (see
glXCreateContext) of the current GL rendering context; two rendering contexts share texture names only if they also share display lists.You may use
glGenTexturesto generate a set of new texture names.When a texture is first bound, it assumes the dimensionality of its target: A texture first bound to
GL_TEXTURE_1Dbecomes 1-dimensional and a texture first bound toGL_TEXTURE_2Dbecomes 2-dimensional. The state of a 1-dimensional texture immediately after it is first bound is equivalent to the state of the defaultGL_TEXTURE_1Dat GL initialization, and similarly for 2-dimensional textures.While a texture is bound, GL operations on the target to which it is bound affect the bound texture, and queries of the target to which it is bound return state from the bound texture. If texture mapping of the dimensionality of the target to which a texture is bound is active, the bound texture is used. In effect, the texture targets become aliases for the textures currently bound to them, and the texture name zero refers to the default textures that were bound to them at initialization.
A texture binding created with
glBindTextureremains active until a different texture is bound to the same target, or until the bound texture is deleted withglDeleteTextures.Once created, a named texture may be re-bound to the target of the matching dimensionality as often as needed. It is usually much faster to use
glBindTextureto bind an existing named texture to one of the texture targets than it is to reload the texture image usingglTexImage1DorglTexImage2D. For additional control over performance, useglPrioritizeTextures.glBindTextureis included in display lists.- Parameter
target Specifies the target to which the texture is bound. Must be either
GL_TEXTURE_1DorGL_TEXTURE_2D.- Parameter
texture Specifies the name of a texture.
- Throws
GL_INVALID_ENUMis generated if target is not one of the allowable values.GL_INVALID_OPERATIONis generated if texture has a dimensionality which doesn't match that of target.GL_INVALID_OPERATIONis generated ifglBindTextureis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglBlendFunc
voidglBlendFunc(intsfactor,intdfactor)- Description
In RGBA mode, pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use
glEnableandglDisablewith argumentGL_BLENDto enable and disable blending.glBlendFuncdefines the operation of blending when it is enabled. sfactor specifies which of nine methods is used to scale the source color components. dfactor specifies which of eight methods is used to scale the destination color components. The eleven possible methods are described in the following table. Each method defines four scale factors, one each for red, green, blue, and alpha.In the table and in subsequent equations, source and destination color components are referred to as (R sub s , G sub s , B sub s , A sub s ) and (R sub d , G sub d , B sub d , A sub d ). They are understood to have integer values between 0 and (k sub R , k sub G , k sub B , k sub A ), where
.RS .ce k sub c ~=~ 2 sup m sub c - 1 .RE
and (m sub R , m sub G , m sub B , m sub A ) is the number of red, green, blue, and alpha bitplanes.
Source and destination scale factors are referred to as (s sub R , s sub G , s sub B , s sub A ) and (d sub R , d sub G , d sub B , d sub A ). The scale factors described in the table, denoted (f sub R , f sub G , f sub B , f sub A ), represent either source or destination factors. All scale factors have range [0,1].
.TS center box ; ci | ci c | c . parameter (f sub R , ~~ f sub G , ~~ f sub B , ~~ f sub A ) =
GL_ZERO(0, ~0, ~0, ~0 )GL_ONE(1, ~1, ~1, ~1 )GL_SRC_COLOR(R sub s / k sub R , ~G sub s / k sub G , ~B sub s / k sub B , ~A sub s / k sub A )GL_ONE_MINUS_SRC_COLOR(1, ~1, ~1, ~1 ) ~-~ (R sub s / k sub R , ~G sub s / k sub G , ~B sub s / k sub B , ~A sub s / k sub A )GL_DST_COLOR(R sub d / k sub R , ~G sub d / k sub G , ~B sub d / k sub B , ~A sub d / k sub A )GL_ONE_MINUS_DST_COLOR(1, ~1, ~1, ~1 ) ~-~ (R sub d / k sub R , ~G sub d / k sub G , ~B sub d / k sub B , ~A sub d / k sub A )GL_SRC_ALPHA(A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A )GL_ONE_MINUS_SRC_ALPHA(1, ~1, ~1, ~1 ) ~-~ (A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A )GL_DST_ALPHA(A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A )GL_ONE_MINUS_DST_ALPHA(1, ~1, ~1, ~1 ) ~-~ (A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A )GL_SRC_ALPHA_SATURATE(i, ~i, ~i, ~1 ) .TE .sp In the table,.RS .nf
i ~=~ min (A sub s , ~k sub A - A sub d ) ~/~ k sub A .fi .RE
To determine the blended RGBA values of a pixel when drawing in RGBA mode, the system uses the following equations:
.RS .nf
R sub d ~=~ min ( k sub R , ~~ R sub s s sub R + R sub d d sub R ) G sub d ~=~ min ( k sub G , ~~ G sub s s sub G + G sub d d sub G ) B sub d ~=~ min ( k sub B , ~~ B sub s s sub B + B sub d d sub B ) A sub d ~=~ min ( k sub A , ~~ A sub s s sub A + A sub d d sub A ) .fi .RE
Despite the apparent precision of the above equations, blending arithmetic is not exactly specified, because blending operates with imprecise integer color values. However, a blend factor that should be equal to 1 is guaranteed not to modify its multiplicand, and a blend factor equal to 0 reduces its multiplicand to 0. For example, when sfactor is
GL_SRC_ALPHA, dfactor isGL_ONE_MINUS_SRC_ALPHA, and A sub s is equal to k sub A, the equations reduce to simple replacement:.RS .nf
R sub d ~=~ R sub s G sub d ~=~ G sub s B sub d ~=~ B sub s A sub d ~=~ A sub s .fi .RE
- Parameter
sfactor Specifies how the red, green, blue, and alpha source blending factors are computed. Nine symbolic constants are accepted:
GL_ZERO,GL_ONE,GL_DST_COLOR,GL_ONE_MINUS_DST_COLOR,GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA,GL_DST_ALPHA,GL_ONE_MINUS_DST_ALPHA, andGL_SRC_ALPHA_SATURATE. The initial value isGL_ONE.- Parameter
dfactor Specifies how the red, green, blue, and alpha destination blending factors are computed. Eight symbolic constants are accepted:
GL_ZERO,GL_ONE,GL_SRC_COLOR,GL_ONE_MINUS_SRC_COLOR,GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA,GL_DST_ALPHA, andGL_ONE_MINUS_DST_ALPHA. The initial value isGL_ZERO.- Throws
GL_INVALID_ENUMis generated if either sfactor or dfactor is not an accepted value.GL_INVALID_OPERATIONis generated ifglBlendFuncis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCallList
voidglCallList(intlist)- Description
glCallListcauses the named display list to be executed. The commands saved in the display list are executed in order, just as if they were called without using a display list. If list has not been defined as a display list,glCallListis ignored.glCallListcan appear inside a display list. To avoid the possibility of infinite recursion resulting from display lists calling one another, a limit is placed on the nesting level of display lists during display-list execution. This limit is at least 64, and it depends on the implementation.GL state is not saved and restored across a call to
glCallList. Thus, changes made to GL state during the execution of a display list remain after execution of the display list is completed. UseglPushAttrib,glPopAttrib,glPushMatrix, andglPopMatrixto preserve GL state acrossglCallListcalls.- Parameter
list Specifies the integer name of the display list to be executed.
- MethodglClear
voidglClear(intmask)- Description
glClearsets the bitplane area of the window to values previously selected byglClearColor,glClearIndex,glClearDepth,glClearStencil, andglClearAccum. Multiple color buffers can be cleared simultaneously by selecting more than one buffer at a time usingglDrawBuffer.The pixel ownership test, the scissor test, dithering, and the buffer writemasks affect the operation of
glClear. The scissor box bounds the cleared region. Alpha function, blend function, logical operation, stenciling, texture mapping, and depth-buffering are ignored byglClear.glCleartakes a single argument that is the bitwise OR of several values indicating which buffer is to be cleared.The values are as follows:
GL_COLOR_BUFFER_BITIndicates the buffers currently enabled for color writing. GL_DEPTH_BUFFER_BITIndicates the depth buffer. GL_ACCUM_BUFFER_BITIndicates the accumulation buffer. GL_STENCIL_BUFFER_BITIndicates the stencil buffer. The value to which each buffer is cleared depends on the setting of the clear value for that buffer.
- Parameter
mask Bitwise OR of masks that indicate the buffers to be cleared. The four masks are
GL_COLOR_BUFFER_BIT,GL_DEPTH_BUFFER_BIT,GL_ACCUM_BUFFER_BIT, andGL_STENCIL_BUFFER_BIT.- Throws
GL_INVALID_VALUEis generated if any bit other than the four defined bits is set in mask.GL_INVALID_OPERATIONis generated ifglClearis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglClearAccum
voidglClearAccum(float|array(float)red,float|voidgreen,float|voidblue,float|voidalpha)- Description
glClearAccumspecifies the red, green, blue, and alpha values used byglClearto clear the accumulation buffer.Values specified by
glClearAccumare clamped to the range [-1,1].- Parameter
red Specify the red, green, blue, and alpha values used when the accumulation buffer is cleared. The initial values are all 0.
- Throws
GL_INVALID_OPERATIONis generated ifglClearAccumis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglClearColor
voidglClearColor(float|array(float)red,float|voidgreen,float|voidblue,float|voidalpha)- Description
glClearColorspecifies the red, green, blue, and alpha values used byglClearto clear the color buffers. Values specified byglClearColorare clamped to the range [0,1].- Parameter
red Specify the red, green, blue, and alpha values used when the color buffers are cleared. The initial values are all 0.
- Throws
GL_INVALID_OPERATIONis generated ifglClearColoris executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglClearDepth
voidglClearDepth(floatdepth)- Description
glClearDepthspecifies the depth value used byglClearto clear the depth buffer. Values specified byglClearDepthare clamped to the range [0,1].- Parameter
depth Specifies the depth value used when the depth buffer is cleared. The initial value is 1.
- Throws
GL_INVALID_OPERATIONis generated ifglClearDepthis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglClearIndex
voidglClearIndex(floatc)- Description
glClearIndexspecifies the index used byglClearto clear the color index buffers. c is not clamped. Rather, c is converted to a fixed-point value with unspecified precision to the right of the binary point. The integer part of this value is then masked with 2 sup m -1, where m is the number of bits in a color index stored in the frame buffer.- Parameter
c Specifies the index used when the color index buffers are cleared. The initial value is 0.
- Throws
GL_INVALID_OPERATIONis generated ifglClearIndexis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglClearStencil
voidglClearStencil(ints)- Description
glClearStencilspecifies the index used byglClearto clear the stencil buffer. s is masked with 2 sup m - 1, where m is the number of bits in the stencil buffer.- Parameter
s Specifies the index used when the stencil buffer is cleared. The initial value is 0.
- Throws
GL_INVALID_OPERATIONis generated ifglClearStencilis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglColor
voidglColor(float|intred,float|intgreen,float|intblue,float|int|voidalpha)voidglColor(array(float|int)rgb)- Description
The GL stores both a current single-valued color index and a current four-valued RGBA color. If no alpha value has been give, 1.0 (full intensity) is implied.
Current color values are stored in floating-point format, with unspecified mantissa and exponent sizes. Unsigned integer color components, when specified, are linearly mapped to floating-point values such that the largest representable value maps to 1.0 (full intensity), and 0 maps to 0.0 (zero intensity). Signed integer color components, when specified, are linearly mapped to floating-point values such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. (Note that this mapping does not convert 0 precisely to 0.0.) Floating-point values are mapped directly.
Neither floating-point nor signed integer values are clamped to the range [0,1] before the current color is updated. However, color components are clamped to this range before they are interpolated or written into a color buffer.
- Parameter
red Specify new red, green, and blue values for the current color.
- Parameter
alpha Specifies a new alpha value for the current color.
- MethodglColorMask
voidglColorMask(intred,intgreen,intblue,intalpha)- Description
glColorMaskspecifies whether the individual color components in the frame buffer can or cannot be written. If red isGL_FALSE, for example, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.Changes to individual bits of components cannot be controlled. Rather, changes are either enabled or disabled for entire color components.
- Parameter
red Specify whether red, green, blue, and alpha can or cannot be written into the frame buffer. The initial values are all
GL_TRUE, indicating that the color components can be written.- Throws
GL_INVALID_OPERATIONis generated ifglColorMaskis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglColorMaterial
voidglColorMaterial(intface,intmode)- Description
glColorMaterialspecifies which material parameters track the current color. WhenGL_COLOR_MATERIALis enabled, the material parameter or parameters specified by mode, of the material or materials specified by face, track the current color at all times.To enable and disable
GL_COLOR_MATERIAL, callglEnableandglDisablewith argumentGL_COLOR_MATERIAL.GL_COLOR_MATERIALis initially disabled.- Parameter
face Specifies whether front, back, or both front and back material parameters should track the current color. Accepted values are
GL_FRONT,GL_BACK, andGL_FRONT_AND_BACK. The initial value isGL_FRONT_AND_BACK.- Parameter
mode Specifies which of several material parameters track the current color. Accepted values are
GL_EMISSION,GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR, andGL_AMBIENT_AND_DIFFUSE. The initial value isGL_AMBIENT_AND_DIFFUSE.- Throws
GL_INVALID_ENUMis generated if face or mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglColorMaterialis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCopyPixels
voidglCopyPixels(intx,inty,intwidth,intheight,inttype)- Description
glCopyPixelscopies a screen-aligned rectangle of pixels from the specified frame buffer location to a region relative to the current raster position. Its operation is well defined only if the entire pixel source region is within the exposed portion of the window. Results of copies from outside the window, or from regions of the window that are not exposed, are hardware dependent and undefined.x and y specify the window coordinates of the lower left corner of the rectangular region to be copied. width and height specify the dimensions of the rectangular region to be copied. Both width and height must not be negative.
Several parameters control the processing of the pixel data while it is being copied. These parameters are set with three commands:
glPixelTransfer,glPixelMap, andglPixelZoom. This reference page describes the effects onglCopyPixelsof most, but not all, of the parameters specified by these three commands.glCopyPixelscopies values from each pixel with the lower left-hand corner at (x + i, y + j) for 0\(<=i<width and 0\(<=j<height. This pixel is said to be the ith pixel in the jth row. Pixels are copied in row order from the lowest to the highest row, left to right in each row.type specifies whether color, depth, or stencil data is to be copied. The details of the transfer for each data type are as follows:
GL_COLORIndices or RGBA colors are read from the buffer currently specified as the read source buffer (see glReadBuffer). If the GL is in color index mode, each index that is read from this buffer is converted to a fixed-point format with an unspecified number of bits to the right of the binary point. Each index is then shifted left byGL_INDEX_SHIFTbits, and added toGL_INDEX_OFFSET. IfGL_INDEX_SHIFTis negative, the shift is to the right. In either case, zero bits fill otherwise unspecified bit locations in the result. IfGL_MAP_COLORis true, the index is replaced with the value that it references in lookup tableGL_PIXEL_MAP_I_TO_I. Whether the lookup replacement of the index is done or not, the integer part of the index is then ANDed with 2 sup b -1, where b is the number of bits in a color index buffer. If the GL is in RGBA mode, the red, green, blue, and alpha components of each pixel that is read are converted to an internal floating-point format with unspecified precision. The conversion maps the largest representable component value to 1.0, and component value 0 to 0.0. The resulting floating-point color values are then multiplied by GL_c_SCALE and added to GL_c_BIAS, where c is RED, GREEN, BLUE, and ALPHA for the respective color components. The results are clamped to the range [0,1]. IfGL_MAP_COLORis true, each color component is scaled by the size of lookup tableGL_PIXEL_MAP_c_TO_c, then replaced by the value that it references in that table. c is R, G, B, or A. The GL then converts the resulting indices or RGBA colors to fragments by attaching the current raster position z coordinate and texture coordinates to each pixel, then assigning window coordinates (x sub r + i , y sub r + j), where (x sub r , y sub r) is the current raster position, and the pixel was the ith pixel in the jth row. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.GL_DEPTHDepth values are read from the depth buffer and converted directly to an internal floating-point format with unspecified precision. The resulting floating-point depth value is then multiplied by GL_DEPTH_SCALEand added toGL_DEPTH_BIAS. The result is clamped to the range [0,1]. The GL then converts the resulting depth components to fragments by attaching the current raster position color or color index and texture coordinates to each pixel, then assigning window coordinates (x sub r + i , y sub r + j), where (x sub r , y sub r) is the current raster position, and the pixel was the ith pixel in the jth row. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.GL_STENCILStencil indices are read from the stencil buffer and converted to an internal fixed-point format with an unspecified number of bits to the right of the binary point. Each fixed-point index is then shifted left by GL_INDEX_SHIFTbits, and added toGL_INDEX_OFFSET. IfGL_INDEX_SHIFTis negative, the shift is to the right. In either case, zero bits fill otherwise unspecified bit locations in the result. IfGL_MAP_STENCILis true, the index is replaced with the value that it references in lookup tableGL_PIXEL_MAP_S_TO_S. Whether the lookup replacement of the index is done or not, the integer part of the index is then ANDed with 2 sup b -1, where b is the number of bits in the stencil buffer. The resulting stencil indices are then written to the stencil buffer such that the index read from the ith location of the jth row is written to location (x sub r + i , y sub r + j), where (x sub r , y sub r) is the current raster position. Only the pixel ownership test, the scissor test, and the stencil writemask affect these write operations.The rasterization described thus far assumes pixel zoom factors of 1.0. If
glPixelZoomis used to change the x and y pixel zoom factors, pixels are converted to fragments as follows. If (x sub r, y sub r) is the current raster position, and a given pixel is in the ith location in the jth row of the source pixel rectangle, then fragments are generated for pixels whose centers are in the rectangle with corners at.ce (x sub r + zoom sub x i, y sub r + zoom sub y j) .sp .5 .ce and .sp .5 .ce (x sub r + zoom sub x (i + 1), y sub r + zoom sub y ( j + 1 ))
where zoom sub x is the value of
GL_ZOOM_Xand zoom sub y is the value ofGL_ZOOM_Y.- Parameter
x Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
- Parameter
width Specify the dimensions of the rectangular region of pixels to be copied. Both must be nonnegative.
- Parameter
type Specifies whether color values, depth values, or stencil values are to be copied. Symbolic constants
GL_COLOR,GL_DEPTH, andGL_STENCILare accepted.- Throws
GL_INVALID_ENUMis generated if type is not an accepted value.GL_INVALID_VALUEis generated if either width or height is negative.GL_INVALID_OPERATIONis generated if type isGL_DEPTHand there is no depth buffer.GL_INVALID_OPERATIONis generated if type isGL_STENCILand there is no stencil buffer.GL_INVALID_OPERATIONis generated ifglCopyPixelsis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCopyTexImage1D
voidglCopyTexImage1D(inttarget,intlevel,intinternalFormat,intx,inty,intwidth,intborder)- Description
glCopyTexImage1Ddefines a one-dimensional texture image with pixels from the currentGL_READ_BUFFER.The screen-aligned pixel row with left corner at ("x", "y") and with a length of "width"~+~2~*~"border" defines the texture array at the mipmap level specified by level. internalFormat specifies the internal format of the texture array.
The pixels in the row are processed exactly as if
glCopyPixelshad been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.Pixel ordering is such that lower x screen coordinates correspond to lower texture coordinates.
If any of the pixels within the specified row of the current
GL_READ_BUFFERare outside the window associated with the current rendering context, then the values obtained for those pixels are undefined.- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_1D.- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
internalFormat Specifies the internal format of the texture. Must be one of the following symbolic constants:
GL_ALPHA,GL_ALPHA4,GL_ALPHA8,GL_ALPHA12,GL_ALPHA16,GL_LUMINANCE,GL_LUMINANCE4,GL_LUMINANCE8,GL_LUMINANCE12,GL_LUMINANCE16,GL_LUMINANCE_ALPHA,GL_LUMINANCE4_ALPHA4,GL_LUMINANCE6_ALPHA2,GL_LUMINANCE8_ALPHA8,GL_LUMINANCE12_ALPHA4,GL_LUMINANCE12_ALPHA12,GL_LUMINANCE16_ALPHA16,GL_INTENSITY,GL_INTENSITY4,GL_INTENSITY8,GL_INTENSITY12,GL_INTENSITY16,GL_RGB,GL_R3_G3_B2,GL_RGB4,GL_RGB5,GL_RGB8,GL_RGB10,GL_RGB12,GL_RGB16,GL_RGBA,GL_RGBA2,GL_RGBA4,GL_RGB5_A1,GL_RGBA8,GL_RGB10_A2,GL_RGBA12, orGL_RGBA16.- Parameter
x Specify the window coordinates of the left corner of the row of pixels to be copied.
- Parameter
width Specifies the width of the texture image. Must be 0 or 2**n ~+~ 2*border for some integer n. The height of the texture image is 1.
- Parameter
border Specifies the width of the border. Must be either 0 or 1.
- Throws
GL_INVALID_ENUMis generated if target is not one of the allowable values.GL_INVALID_VALUEis generated if level is less than 0. .PGL_INVALID_VALUEmay be generated if level is greater than log sub 2 max, where max is the returned value ofGL_MAX_TEXTURE_SIZE. .PGL_INVALID_VALUEis generated if internalFormat is not an allowable value.GL_INVALID_VALUEis generated if width is less than 0 or greater than 2 +GL_MAX_TEXTURE_SIZE, or if it cannot be represented as 2 ** n ~+~ 2~*~("border") for some integer value of n.GL_INVALID_VALUEis generated if border is not 0 or 1.GL_INVALID_OPERATIONis generated ifglCopyTexImage1Dis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCopyTexImage2D
voidglCopyTexImage2D(inttarget,intlevel,intinternalFormat,intx,inty,intwidth,intheight,intborder)- Description
glCopyTexImage2Ddefines a two-dimensional texture image with pixels from the currentGL_READ_BUFFER.The screen-aligned pixel rectangle with lower left corner at (x, y) and with a width of width~+~2~*~border and a height of height~+~2~*~border defines the texture array at the mipmap level specified by level. internalFormat specifies the internal format of the texture array.
The pixels in the rectangle are processed exactly as if
glCopyPixelshad been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,1] and then converted to the texture's internal format for storage in the texel array.Pixel ordering is such that lower x and y screen coordinates correspond to lower s and t texture coordinates.
If any of the pixels within the specified rectangle of the current
GL_READ_BUFFERare outside the window associated with the current rendering context, then the values obtained for those pixels are undefined.- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_2D.- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
internalFormat Specifies the internal format of the texture. Must be one of the following symbolic constants:
GL_ALPHA,GL_ALPHA4,GL_ALPHA8,GL_ALPHA12,GL_ALPHA16,GL_LUMINANCE,GL_LUMINANCE4,GL_LUMINANCE8,GL_LUMINANCE12,GL_LUMINANCE16,GL_LUMINANCE_ALPHA,GL_LUMINANCE4_ALPHA4,GL_LUMINANCE6_ALPHA2,GL_LUMINANCE8_ALPHA8,GL_LUMINANCE12_ALPHA4,GL_LUMINANCE12_ALPHA12,GL_LUMINANCE16_ALPHA16,GL_INTENSITY,GL_INTENSITY4,GL_INTENSITY8,GL_INTENSITY12,GL_INTENSITY16,GL_RGB,GL_R3_G3_B2,GL_RGB4,GL_RGB5,GL_RGB8,GL_RGB10,GL_RGB12,GL_RGB16,GL_RGBA,GL_RGBA2,GL_RGBA4,GL_RGB5_A1,GL_RGBA8,GL_RGB10_A2,GL_RGBA12, orGL_RGBA16.- Parameter
x Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
- Parameter
width Specifies the width of the texture image. Must be 0 or 2**n ~+~ 2*border for some integer n.
- Parameter
height Specifies the height of the texture image. Must be 0 or 2**m ~+~ 2*border for some integer m.
- Parameter
border Specifies the width of the border. Must be either 0 or 1.
- Throws
GL_INVALID_ENUMis generated if target is notGL_TEXTURE_2D.GL_INVALID_VALUEis generated if level is less than 0. .PGL_INVALID_VALUEmay be generated if level is greater than log sub 2 max, where max is the returned value ofGL_MAX_TEXTURE_SIZE.GL_INVALID_VALUEis generated if width or height is less than 0, greater than 2~+~GL_MAX_TEXTURE_SIZE, or if width or height cannot be represented as 2**k ~+~ 2~*~border for some integer k.GL_INVALID_VALUEis generated if border is not 0 or 1.GL_INVALID_VALUEis generated if internalFormat is not one of the allowable values.GL_INVALID_OPERATIONis generated ifglCopyTexImage2Dis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCopyTexSubImage1D
voidglCopyTexSubImage1D(inttarget,intlevel,intxoffset,intx,inty,intwidth)- Description
glCopyTexSubImage1Dreplaces a portion of a one-dimensional texture image with pixels from the currentGL_READ_BUFFER(rather than from main memory, as is the case forglTexSubImage1D).The screen-aligned pixel row with left corner at (x,\ y), and with length width replaces the portion of the texture array with x indices xoffset through "xoffset" ~+~ "width" ~-~ 1, inclusive. The destination in the texture array may not include any texels outside the texture array as it was originally specified.
The pixels in the row are processed exactly as if
glCopyPixelshad been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.It is not an error to specify a subtexture with zero width, but such a specification has no effect. If any of the pixels within the specified row of the current
GL_READ_BUFFERare outside the read window associated with the current rendering context, then the values obtained for those pixels are undefined.No change is made to the internalformat, width, or border parameters of the specified texture array or to texel values outside the specified subregion.
- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_1D.- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
xoffset Specifies the texel offset within the texture array.
- Parameter
x Specify the window coordinates of the left corner of the row of pixels to be copied.
- Parameter
width Specifies the width of the texture subimage.
- Throws
GL_INVALID_ENUMis generated if target is notGL_TEXTURE_1D.GL_INVALID_OPERATIONis generated if the texture array has not been defined by a previousglTexImage1DorglCopyTexImage1Doperation.GL_INVALID_VALUEis generated if level is less than 0. .PGL_INVALID_VALUEmay be generated if level>log sub 2 max, where max is the returned value ofGL_MAX_TEXTURE_SIZE.GL_INVALID_VALUEis generated if y ~<~ ~-b or if width ~<~ ~-b, where b is the border width of the texture array.GL_INVALID_VALUEis generated if "xoffset" ~<~ ~-b, or ("xoffset"~+~"width") ~>~ (w-b), where w is theGL_TEXTURE_WIDTH, and b is theGL_TEXTURE_BORDERof the texture image being modified. Note that w includes twice the border width.
- MethodglCopyTexSubImage2D
voidglCopyTexSubImage2D(inttarget,intlevel,intxoffset,intyoffset,intx,inty,intwidth,intheight)- Description
glCopyTexSubImage2Dreplaces a rectangular portion of a two-dimensional texture image with pixels from the currentGL_READ_BUFFER(rather than from main memory, as is the case forglTexSubImage2D).The screen-aligned pixel rectangle with lower left corner at (x,\ y) and with width width and height height replaces the portion of the texture array with x indices xoffset through xoffset~+~width~-~1, inclusive, and y indices yoffset through yoffset~+~height~-~1, inclusive, at the mipmap level specified by level.
The pixels in the rectangle are processed exactly as if
glCopyPixelshad been called, but the process stops just before final conversion. At this point, all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.The destination rectangle in the texture array may not include any texels outside the texture array as it was originally specified. It is not an error to specify a subtexture with zero width or height, but such a specification has no effect.
If any of the pixels within the specified rectangle of the current
GL_READ_BUFFERare outside the read window associated with the current rendering context, then the values obtained for those pixels are undefined.No change is made to the internalformat, width, height, or border parameters of the specified texture array or to texel values outside the specified subregion.
- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_2D- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
xoffset Specifies a texel offset in the x direction within the texture array.
- Parameter
yoffset Specifies a texel offset in the y direction within the texture array.
- Parameter
x Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
- Parameter
width Specifies the width of the texture subimage.
- Parameter
height Specifies the height of the texture subimage.
- Throws
GL_INVALID_ENUMis generated if target is notGL_TEXTURE_2D.GL_INVALID_OPERATIONis generated if the texture array has not been defined by a previousglTexImage2DorglCopyTexImage2Doperation.GL_INVALID_VALUEis generated if level is less than 0. .PGL_INVALID_VALUEmay be generated if level is greater than log sub 2 max, where max is the returned value ofGL_MAX_TEXTURE_SIZE.GL_INVALID_VALUEis generated if x ~<~ ~-b or if y ~<~ ~-b, where b is the border width of the texture array.GL_INVALID_VALUEis generated if "xoffset" ~<~ -b, (xoffset~+~width)~>~(w ~-~b), yoffset~<~ ~-b, or (yoffset~+~height)~>~(h ~-~b), where w is theGL_TEXTURE_WIDTH, h is theGL_TEXTURE_HEIGHT, and b is theGL_TEXTURE_BORDERof the texture image being modified. Note that w and h include twice the border width.GL_INVALID_OPERATIONis generated ifglCopyTexSubImage2Dis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglCullFace
voidglCullFace(intmode)- Description
glCullFacespecifies whether front- or back-facing facets are culled (as specified by mode) when facet culling is enabled. Facet culling is initially disabled. To enable and disable facet culling, call theglEnableandglDisablecommands with the argumentGL_CULL_FACE. Facets include triangles, quadrilaterals, polygons, and rectangles.glFrontFacespecifies which of the clockwise and counterclockwise facets are front-facing and back-facing. SeeglFrontFace.- Parameter
mode Specifies whether front- or back-facing facets are candidates for culling. Symbolic constants
GL_FRONT,GL_BACK, andGL_FRONT_AND_BACKare accepted. The initial value isGL_BACK.- Throws
GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglCullFaceis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDeleteLists
voidglDeleteLists(intlist,intrange)- Description
glDeleteListscauses a contiguous group of display lists to be deleted. list is the name of the first display list to be deleted, and range is the number of display lists to delete. All display lists \fId\fP with list \(<= \fId\fP \(<= list + range - 1 are deleted.All storage locations allocated to the specified display lists are freed, and the names are available for reuse at a later time. Names within the range that do not have an associated display list are ignored. If range is 0, nothing happens.
- Parameter
list Specifies the integer name of the first display list to delete.
- Parameter
range Specifies the number of display lists to delete.
- Throws
GL_INVALID_VALUEis generated if range is negative.GL_INVALID_OPERATIONis generated ifglDeleteListsis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDepthFunc
voidglDepthFunc(intfunc)- Description
glDepthFuncspecifies the function used to compare each incoming pixel depth value with the depth value present in the depth buffer. The comparison is performed only if depth testing is enabled. (SeeglEnableandglDisableofGL_DEPTH_TEST.)func specifies the conditions under which the pixel will be drawn. The comparison functions are as follows:
GL_NEVERNever passes. GL_LESSPasses if the incoming depth value is less than the stored depth value. GL_EQUALPasses if the incoming depth value is equal to the stored depth value. GL_LEQUALPasses if the incoming depth value is less than or equal to the stored depth value. GL_GREATERPasses if the incoming depth value is greater than the stored depth value. GL_NOTEQUALPasses if the incoming depth value is not equal to the stored depth value. GL_GEQUALPasses if the incoming depth value is greater than or equal to the stored depth value. GL_ALWAYSAlways passes. The initial value of func is
GL_LESS. Initially, depth testing is disabled. .NOTES Even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled.- Parameter
func Specifies the depth comparison function. Symbolic constants
GL_NEVER,GL_LESS,GL_EQUAL,GL_LEQUAL,GL_GREATER,GL_NOTEQUAL,GL_GEQUAL, andGL_ALWAYSare accepted. The initial value isGL_LESS.- Throws
GL_INVALID_ENUMis generated if func is not an accepted value.GL_INVALID_OPERATIONis generated ifglDepthFuncis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDepthMask
voidglDepthMask(intflag)- Description
glDepthMaskspecifies whether the depth buffer is enabled for writing. If flag isGL_FALSE, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.- Parameter
flag Specifies whether the depth buffer is enabled for writing. If flag is
GL_FALSE, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.- Throws
GL_INVALID_OPERATIONis generated ifglDepthMaskis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDepthRange
voidglDepthRange(floatzNear,floatzFar)- Description
After clipping and division by w, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes.
glDepthRangespecifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). Thus, the values accepted byglDepthRangeare both clamped to this range before they are accepted.The setting of (0,1) maps the near plane to 0 and the far plane to 1. With this mapping, the depth buffer range is fully utilized.
- Parameter
zNear Specifies the mapping of the near clipping plane to window coordinates. The initial value is 0.
- Parameter
zFar Specifies the mapping of the far clipping plane to window coordinates. The initial value is 1.
- Throws
GL_INVALID_OPERATIONis generated ifglDepthRangeis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDisable
voidglDisable(intcap)- Description
glEnableandglDisableenable and disable various capabilities. UseglIsEnabledorglGetto determine the current setting of any capability. The initial value for each capability with the exception ofGL_DITHERisGL_FALSE. The initial value forGL_DITHERisGL_TRUE.Both
glEnableandglDisabletake a single argument, cap, which can assume one of the following values:GL_ALPHA_TESTIf enabled, do alpha testing. See glAlphaFunc.GL_AUTO_NORMALIf enabled, generate normal vectors when either GL_MAP2_VERTEX_3orGL_MAP2_VERTEX_4is used to generate vertices. SeeglMap2.GL_BLENDIf enabled, blend the incoming RGBA color values with the values in the color buffers. See glBlendFunc.GL_CLIP_PLANEiIf enabled, clip geometry against user-defined clipping plane i. See glClipPlane.GL_COLOR_LOGIC_OPIf enabled, apply the currently selected logical operation to the incoming RGBA color and color buffer values. See glLogicOp.GL_COLOR_MATERIALIf enabled, have one or more material parameters track the current color. See glColorMaterial.GL_CULL_FACEIf enabled, cull polygons based on their winding in window coordinates. See glCullFace.GL_DEPTH_TESTIf enabled, do depth comparisons and update the depth buffer. Note that even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled. See glDepthFuncandglDepthRange.GL_DITHERIf enabled, dither color components or indices before they are written to the color buffer. GL_FOGIf enabled, blend a fog color into the posttexturing color. See glFog.GL_INDEX_LOGIC_OPIf enabled, apply the currently selected logical operation to the incoming index and color buffer indices. See glLogicOp.GL_LIGHTiIf enabled, include light i in the evaluation of the lighting equation. See glLightModelandglLight.GL_LIGHTINGIf enabled, use the current lighting parameters to compute the vertex color or index. Otherwise, simply associate the current color or index with each vertex. See glMaterial,glLightModel, andglLight.GL_LINE_SMOOTHIf enabled, draw lines with correct filtering. Otherwise, draw aliased lines. See glLineWidth.GL_LINE_STIPPLEIf enabled, use the current line stipple pattern when drawing lines. See glLineStipple.GL_MAP1_COLOR_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate RGBA values. SeeglMap1.GL_MAP1_INDEXIf enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate color indices. SeeglMap1.GL_MAP1_NORMALIf enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate normals. SeeglMap1.GL_MAP1_TEXTURE_COORD_1If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_2If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s and t texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_3If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s, t, and r texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s, t, r, and q texture coordinates. SeeglMap1.GL_MAP1_VERTEX_3If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate x, y, and z vertex coordinates. SeeglMap1.GL_MAP1_VERTEX_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate homogeneous x, y, z, and w vertex coordinates. SeeglMap1.GL_MAP2_COLOR_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate RGBA values. SeeglMap2.GL_MAP2_INDEXIf enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate color indices. SeeglMap2.GL_MAP2_NORMALIf enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate normals. SeeglMap2.GL_MAP2_TEXTURE_COORD_1If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_2If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s and t texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_3If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s, t, and r texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s, t, r, and q texture coordinates. SeeglMap2.GL_MAP2_VERTEX_3If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate x, y, and z vertex coordinates. SeeglMap2.GL_MAP2_VERTEX_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate homogeneous x, y, z, and w vertex coordinates. SeeglMap2.GL_NORMALIZEIf enabled, normal vectors specified with glNormalare scaled to unit length after transformation. SeeglNormal.GL_POINT_SMOOTHIf enabled, draw points with proper filtering. Otherwise, draw aliased points. See glPointSize.GL_POLYGON_OFFSET_FILLIf enabled, and if the polygon is rendered in GL_FILLmode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. SeeglPolygonOffset.GL_POLYGON_OFFSET_LINEIf enabled, and if the polygon is rendered in GL_LINEmode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. SeeglPolygonOffset.GL_POLYGON_OFFSET_POINTIf enabled, an offset is added to depth values of a polygon's fragments before the depth comparison is performed, if the polygon is rendered in GL_POINTmode. SeeglPolygonOffset.GL_POLYGON_SMOOTHIf enabled, draw polygons with proper filtering. Otherwise, draw aliased polygons. For correct anti-aliased polygons, an alpha buffer is needed and the polygons must be sorted front to back. GL_POLYGON_STIPPLEIf enabled, use the current polygon stipple pattern when rendering polygons. See glPolygonStipple.GL_SCISSOR_TESTIf enabled, discard fragments that are outside the scissor rectangle. See glScissor.GL_STENCIL_TESTIf enabled, do stencil testing and update the stencil buffer. See glStencilFuncandglStencilOp.GL_TEXTURE_1DIf enabled, one-dimensional texturing is performed (unless two-dimensional texturing is also enabled). See glTexImage1D.GL_TEXTURE_2DIf enabled, two-dimensional texturing is performed. See glTexImage2D.GL_TEXTURE_GEN_QIf enabled, the q texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current q texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_RIf enabled, the r texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current r texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_SIf enabled, the s texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current s texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_TIf enabled, the t texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current t texture coordinate is used. SeeglTexGen.- Parameter
cap Specifies a symbolic constant indicating a GL capability.
- Parameter
cap Specifies a symbolic constant indicating a GL capability.
- Throws
GL_INVALID_ENUMis generated if cap is not one of the values listed previously.GL_INVALID_OPERATIONis generated ifglEnableorglDisableis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDisableClientState
voidglDisableClientState(intcap)- Description
glEnableClientStateandglDisableClientStateenable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. BothglEnableClientStateandglDisableClientStatetake a single argument, cap, which can assume one of the following values:GL_COLOR_ARRAYIf enabled, the color array is enabled for writing and used during rendering when glDrawArraysorglDrawElementis called. SeeglColorPointer.GL_EDGE_FLAG_ARRAYIf enabled, the edge flag array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglEdgeFlagPointer.GL_INDEX_ARRAYIf enabled, the index array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglIndexPointer.GL_NORMAL_ARRAYIf enabled, the normal array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglNormalPointer.GL_TEXTURE_COORD_ARRAYIf enabled, the texture coordinate array is enabled for writing and used for rendering when glDrawArraysorglDrawElementsis called. SeeglTexCoordPointer.GL_VERTEX_ARRAYIf enabled, the vertex array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglVertexPointer.- Parameter
cap Specifies the capability to enable. Symbolic constants
GL_COLOR_ARRAY,GL_EDGE_FLAG_ARRAY,GL_INDEX_ARRAY,GL_NORMAL_ARRAY,GL_TEXTURE_COORD_ARRAY, andGL_VERTEX_ARRAYare accepted.- Parameter
cap Specifies the capability to disable.
- Throws
GL_INVALID_ENUMis generated if cap is not an accepted value.glEnableClientStateis not allowed between the execution ofglBeginand the correspondingglEnd, but an error may or may not be generated. If no error is generated, the behavior is undefined.
- MethodglDrawArrays
voidglDrawArrays(intmode,intfirst,intcount)- Description
glDrawArraysspecifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertexes, normals, and colors and use them to construct a sequence of primitives with a single call toglDrawArrays.When
glDrawArraysis called, it uses count sequential elements from each enabled array to construct a sequence of geometric primitives, beginning with element first. mode specifies what kind of primitives are constructed, and how the array elements construct those primitives. IfGL_VERTEX_ARRAYis not enabled, no geometric primitives are generated.Vertex attributes that are modified by
glDrawArrayshave an unspecified value afterglDrawArraysreturns. For example, ifGL_COLOR_ARRAYis enabled, the value of the current color is undefined afterglDrawArraysexecutes. Attributes that aren't modified remain well defined.- Parameter
mode Specifies what kind of primitives to render. Symbolic constants
GL_POINTS,GL_LINE_STRIP,GL_LINE_LOOP,GL_LINES,GL_TRIANGLE_STRIP,GL_TRIANGLE_FAN,GL_TRIANGLES,GL_QUAD_STRIP,GL_QUADS, andGL_POLYGONare accepted.- Parameter
first Specifies the starting index in the enabled arrays.
- Parameter
count Specifies the number of indices to be rendered.
- Throws
GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_VALUEis generated if count is negative.GL_INVALID_OPERATIONis generated ifglDrawArraysis executed between the execution ofglBeginand the correspondingglEnd.
- MethodglDrawBuffer
voidglDrawBuffer(intmode)- Description
When colors are written to the frame buffer, they are written into the color buffers specified by
glDrawBuffer. The specifications are as follows:GL_NONENo color buffers are written. GL_FRONT_LEFTOnly the front left color buffer is written. GL_FRONT_RIGHTOnly the front right color buffer is written. GL_BACK_LEFTOnly the back left color buffer is written. GL_BACK_RIGHTOnly the back right color buffer is written. GL_FRONTOnly the front left and front right color buffers are written. If there is no front right color buffer, only the front left color buffer is written. GL_BACKOnly the back left and back right color buffers are written. If there is no back right color buffer, only the back left color buffer is written. GL_LEFTOnly the front left and back left color buffers are written. If there is no back left color buffer, only the front left color buffer is written. GL_RIGHTOnly the front right and back right color buffers are written. If there is no back right color buffer, only the front right color buffer is written. GL_FRONT_AND_BACKAll the front and back color buffers (front left, front right, back left, back right) are written. If there are no back color buffers, only the front left and front right color buffers are written. If there are no right color buffers, only the front left and back left color buffers are written. If there are no right or back color buffers, only the front left color buffer is written. GL_AUXi Only auxiliary color buffer i is written. If more than one color buffer is selected for drawing, then blending or logical operations are computed and applied independently for each color buffer and can produce different results in each buffer.
Monoscopic contexts include only .I left buffers, and stereoscopic contexts include both .I left and .I right buffers. Likewise, single-buffered contexts include only .I front buffers, and double-buffered contexts include both .I front and .I back buffers. The context is selected at GL initialization.
- Parameter
mode Specifies up to four color buffers to be drawn into. Symbolic constants
GL_NONE,GL_FRONT_LEFT,GL_FRONT_RIGHT,GL_BACK_LEFT,GL_BACK_RIGHT,GL_FRONT,GL_BACK,GL_LEFT,GL_RIGHT,GL_FRONT_AND_BACK, and GL_AUXi, where i is between 0 and ``GL_AUX_BUFFERS'' -1, are accepted (GL_AUX_BUFFERSis not the upper limit; useglGetto query the number of available aux buffers.) The initial value isGL_FRONTfor single-buffered contexts, andGL_BACKfor double-buffered contexts.- Throws
GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated if none of the buffers indicated by mode exists.GL_INVALID_OPERATIONis generated ifglDrawBufferis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglDrawPixels
voidglDrawPixels(object|mapping(string:object)width,object|mapping(string:object)height,object|mapping(string:object)format,object|mapping(string:object)type,array(object|mapping(string:object))pixels)- Description
glDrawPixelsreads pixel data from memory and writes it into the frame buffer relative to the current raster position. UseglRasterPosto set the current raster position; useglGetwith argumentGL_CURRENT_RASTER_POSITIONto query the raster position.Several parameters define the encoding of pixel data in memory and control the processing of the pixel data before it is placed in the frame buffer. These parameters are set with four commands:
glPixelStore,glPixelTransfer,glPixelMap, andglPixelZoom. This reference page describes the effects onglDrawPixelsof many, but not all, of the parameters specified by these four commands.Data is read from pixels as a sequence of signed or unsigned bytes, signed or unsigned shorts, signed or unsigned integers, or single-precision floating-point values, depending on type. Each of these bytes, shorts, integers, or floating-point values is interpreted as one color or depth component, or one index, depending on format. Indices are always treated individually. Color components are treated as groups of one, two, three, or four values, again based on format. Both individual indices and groups of components are referred to as pixels. If type is
GL_BITMAP, the data must be unsigned bytes, and format must be eitherGL_COLOR_INDEXorGL_STENCIL_INDEX. Each unsigned byte is treated as eight 1-bit pixels, with bit ordering determined byGL_UNPACK_LSB_FIRST(seeglPixelStore).widthtimesheight pixels are read from memory, starting at location pixels. By default, these pixels are taken from adjacent memory locations, except that after all width pixels are read, the read pointer is advanced to the next four-byte boundary. The four-byte row alignment is specified by
glPixelStorewith argumentGL_UNPACK_ALIGNMENT, and it can be set to one, two, four, or eight bytes. Other pixel store parameters specify different read pointer advancements, both before the first pixel is read and after all width pixels are read. See theglPixelStorereference page for details on these options.The widthtimesheight pixels that are read from memory are each operated on in the same way, based on the values of several parameters specified by
glPixelTransferandglPixelMap. The details of these operations, as well as the target buffer into which the pixels are drawn, are specific to the format of the pixels, as specified by format. format can assume one of eleven symbolic values:GL_COLOR_INDEXEach pixel is a single value, a color index. It is converted to fixed-point format, with an unspecified number of bits to the right of the binary point, regardless of the memory data type. Floating-point values convert to true fixed-point values. Signed and unsigned integer data is converted with all fraction bits set to 0. Bitmap data convert to either 0 or 1. Each fixed-point index is then shifted left by GL_INDEX_SHIFTbits and added toGL_INDEX_OFFSET. IfGL_INDEX_SHIFTis negative, the shift is to the right. In either case, zero bits fill otherwise unspecified bit locations in the result. If the GL is in RGBA mode, the resulting index is converted to an RGBA pixel with the help of theGL_PIXEL_MAP_I_TO_R,GL_PIXEL_MAP_I_TO_G,GL_PIXEL_MAP_I_TO_B, andGL_PIXEL_MAP_I_TO_Atables. If the GL is in color index mode, and ifGL_MAP_COLORis true, the index is replaced with the value that it references in lookup tableGL_PIXEL_MAP_I_TO_I. Whether the lookup replacement of the index is done or not, the integer part of the index is then ANDed with 2 sup b -1, where b is the number of bits in a color index buffer. The GL then converts the resulting indices or RGBA colors to fragments by attaching the current raster position z coordinate and texture coordinates to each pixel, then assigning x and y window coordinates to the nth fragment such that .sp .RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .ce 0 .sp .RE where (x sub r , y sub r) is the current raster position. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.GL_STENCIL_INDEXEach pixel is a single value, a stencil index. It is converted to fixed-point format, with an unspecified number of bits to the right of the binary point, regardless of the memory data type. Floating-point values convert to true fixed-point values. Signed and unsigned integer data is converted with all fraction bits set to 0. Bitmap data convert to either 0 or 1. Each fixed-point index is then shifted left by GL_INDEX_SHIFTbits, and added toGL_INDEX_OFFSET. IfGL_INDEX_SHIFTis negative, the shift is to the right. In either case, zero bits fill otherwise unspecified bit locations in the result. IfGL_MAP_STENCILis true, the index is replaced with the value that it references in lookup tableGL_PIXEL_MAP_S_TO_S. Whether the lookup replacement of the index is done or not, the integer part of the index is then ANDed with 2 sup b -1, where b is the number of bits in the stencil buffer. The resulting stencil indices are then written to the stencil buffer such that the nth index is written to location.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .fi .sp .RE
where (x sub r , y sub r) is the current raster position. Only the pixel ownership test, the scissor test, and the stencil writemask affect these write operations.
GL_DEPTH_COMPONENTEach pixel is a single-depth component. Floating-point data is converted directly to an internal floating-point format with unspecified precision. Signed integer data is mapped linearly to the internal floating-point format such that the most positive representable integer value maps to 1.0, and the most negative representable value maps to -1.0. Unsigned integer data is mapped similarly: the largest integer value maps to 1.0, and 0 maps to 0.0. The resulting floating-point depth value is then multiplied by by GL_DEPTH_SCALEand added toGL_DEPTH_BIAS. The result is clamped to the range [0,1]. The GL then converts the resulting depth components to fragments by attaching the current raster position color or color index and texture coordinates to each pixel, then assigning x and y window coordinates to the nth fragment such that.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .ce 0 .sp .RE
where (x sub r , y sub r) is the current raster position. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.
GL_RGBAEach pixel is a four-component group: for GL_RGBA, the red component is first, followed by green, followed by blue, followed by alpha. Floating-point values are converted directly to an internal floating-point format with unspecified precision. Signed integer values are mapped linearly to the internal floating-point format such that the most positive representable integer value maps to 1.0, and the most negative representable value maps to -1.0. (Note that this mapping does not convert 0 precisely to 0.0.) Unsigned integer data is mapped similarly: the largest integer value maps to 1.0, and 0 maps to 0.0. The resulting floating-point color values are then multiplied byGL_c_SCALEand added toGL_c_BIAS, where c is RED, GREEN, BLUE, and ALPHA for the respective color components. The results are clamped to the range [0,1]. IfGL_MAP_COLORis true, each color component is scaled by the size of lookup tableGL_PIXEL_MAP_c_TO_c, then replaced by the value that it references in that table. c is R, G, B, or A respectively. The GL then converts the resulting RGBA colors to fragments by attaching the current raster position z coordinate and texture coordinates to each pixel, then assigning x and y window coordinates to the nth fragment such that.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .ce 0 .sp .RE
where (x sub r , y sub r) is the current raster position. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.
GL_REDEach pixel is a single red component. This component is converted to the internal floating-point format in the same way the red component of an RGBA pixel is. It is then converted to an RGBA pixel with green and blue set to 0, and alpha set to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_GREENEach pixel is a single green component. This component is converted to the internal floating-point format in the same way the green component of an RGBA pixel is. It is then converted to an RGBA pixel with red and blue set to 0, and alpha set to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_BLUEEach pixel is a single blue component. This component is converted to the internal floating-point format in the same way the blue component of an RGBA pixel is. It is then converted to an RGBA pixel with red and green set to 0, and alpha set to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_ALPHAEach pixel is a single alpha component. This component is converted to the internal floating-point format in the same way the alpha component of an RGBA pixel is. It is then converted to an RGBA pixel with red, green, and blue set to 0. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_RGBEach pixel is a three-component group: red first, followed by green, followed by blue. Each component is converted to the internal floating-point format in the same way the red, green, and blue components of an RGBA pixel are. The color triple is converted to an RGBA pixel with alpha set to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_LUMINANCEEach pixel is a single luminance component. This component is converted to the internal floating-point format in the same way the red component of an RGBA pixel is. It is then converted to an RGBA pixel with red, green, and blue set to the converted luminance value, and alpha set to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. GL_LUMINANCE_ALPHAEach pixel is a two-component group: luminance first, followed by alpha. The two components are converted to the internal floating-point format in the same way the red component of an RGBA pixel is. They are then converted to an RGBA pixel with red, green, and blue set to the converted luminance value, and alpha set to the converted alpha value. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. The following table summarizes the meaning of the valid constants for the type parameter: .sp 2 .TS center box ; ci | ci c | c . type corresponding type = GL_UNSIGNED_BYTE unsigned 8-bit integer GL_BYTE signed 8-bit integer GL_BITMAP single bits in unsigned 8-bit integers GL_UNSIGNED_SHORT unsigned 16-bit integer GL_SHORT signed 16-bit integer GL_UNSIGNED_INT unsigned 32-bit integer GL_INT 32-bit integer GL_FLOAT single-precision floating-point .TE .sp
The rasterization described so far assumes pixel zoom factors of 1. If
glPixelZoomis used to change the x and y pixel zoom factors, pixels are converted to fragments as follows. If (x sub r, y sub r) is the current raster position, and a given pixel is in the nth column and mth row of the pixel rectangle, then fragments are generated for pixels whose centers are in the rectangle with corners at .sp .RS .ce (x sub r + zoom sub x n, y sub r + zoom sub y m) .sp .ce (x sub r + zoom sub x (n + 1), y sub r + zoom sub y ( m + 1 )) .ce 0 .sp .REwhere zoom sub x is the value of
GL_ZOOM_Xand zoom sub y is the value ofGL_ZOOM_Y.- Parameter
width Specify the dimensions of the pixel rectangle to be written into the frame buffer.
- Parameter
format Specifies the format of the pixel data. Symbolic constants
GL_COLOR_INDEX,GL_STENCIL_INDEX,GL_DEPTH_COMPONENT,GL_RGBA,GL_RED,GL_GREEN,GL_BLUE,GL_ALPHA,GL_RGB,GL_LUMINANCE, andGL_LUMINANCE_ALPHAare accepted.- Parameter
type Specifies the data type for pixels. Symbolic constants
GL_UNSIGNED_BYTE,GL_BYTE,GL_BITMAP,GL_UNSIGNED_SHORT,GL_SHORT,GL_UNSIGNED_INT,GL_INT, andGL_FLOATare accepted.- Parameter
pixels Specifies a pointer to the pixel data.
- Throws
GL_INVALID_VALUEis generated if either width or height is negative.GL_INVALID_ENUMis generated if format or type is not one of the accepted values.GL_INVALID_OPERATIONis generated if format isGL_RED,GL_GREEN,GL_BLUE,GL_ALPHA,GL_RGB,GL_RGBA,GL_LUMINANCE, orGL_LUMINANCE_ALPHA, and the GL is in color index mode.GL_INVALID_ENUMis generated if type isGL_BITMAPand format is not eitherGL_COLOR_INDEXorGL_STENCIL_INDEX.GL_INVALID_OPERATIONis generated if format isGL_STENCIL_INDEXand there is no stencil buffer.GL_INVALID_OPERATIONis generated ifglDrawPixelsis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglEdgeFlag
voidglEdgeFlag(intflag)- Description
Each vertex of a polygon, separate triangle, or separate quadrilateral specified between a
glBegin/glEndpair is marked as the start of either a boundary or nonboundary edge. If the current edge flag is true when the vertex is specified, the vertex is marked as the start of a boundary edge. Otherwise, the vertex is marked as the start of a nonboundary edge.glEdgeFlagsets the edge flag bit toGL_TRUEif flag isGL_TRUE, and toGL_FALSEotherwise.The vertices of connected triangles and connected quadrilaterals are always marked as boundary, regardless of the value of the edge flag.
Boundary and nonboundary edge flags on vertices are significant only if
GL_POLYGON_MODEis set toGL_POINTorGL_LINE. SeeglPolygonMode.- Parameter
flag Specifies the current edge flag value, either
GL_TRUEorGL_FALSE. The initial value isGL_TRUE.- Parameter
flag Specifies a pointer to an array that contains a single boolean element, which replaces the current edge flag value.
- MethodglEnable
voidglEnable(intcap)- Description
glEnableandglDisableenable and disable various capabilities. UseglIsEnabledorglGetto determine the current setting of any capability. The initial value for each capability with the exception ofGL_DITHERisGL_FALSE. The initial value forGL_DITHERisGL_TRUE.Both
glEnableandglDisabletake a single argument, cap, which can assume one of the following values:GL_ALPHA_TESTIf enabled, do alpha testing. See glAlphaFunc.GL_AUTO_NORMALIf enabled, generate normal vectors when either GL_MAP2_VERTEX_3orGL_MAP2_VERTEX_4is used to generate vertices. SeeglMap2.GL_BLENDIf enabled, blend the incoming RGBA color values with the values in the color buffers. See glBlendFunc.GL_CLIP_PLANEiIf enabled, clip geometry against user-defined clipping plane i. See glClipPlane.GL_COLOR_LOGIC_OPIf enabled, apply the currently selected logical operation to the incoming RGBA color and color buffer values. See glLogicOp.GL_COLOR_MATERIALIf enabled, have one or more material parameters track the current color. See glColorMaterial.GL_CULL_FACEIf enabled, cull polygons based on their winding in window coordinates. See glCullFace.GL_DEPTH_TESTIf enabled, do depth comparisons and update the depth buffer. Note that even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled. See glDepthFuncandglDepthRange.GL_DITHERIf enabled, dither color components or indices before they are written to the color buffer. GL_FOGIf enabled, blend a fog color into the posttexturing color. See glFog.GL_INDEX_LOGIC_OPIf enabled, apply the currently selected logical operation to the incoming index and color buffer indices. See glLogicOp.GL_LIGHTiIf enabled, include light i in the evaluation of the lighting equation. See glLightModelandglLight.GL_LIGHTINGIf enabled, use the current lighting parameters to compute the vertex color or index. Otherwise, simply associate the current color or index with each vertex. See glMaterial,glLightModel, andglLight.GL_LINE_SMOOTHIf enabled, draw lines with correct filtering. Otherwise, draw aliased lines. See glLineWidth.GL_LINE_STIPPLEIf enabled, use the current line stipple pattern when drawing lines. See glLineStipple.GL_MAP1_COLOR_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate RGBA values. SeeglMap1.GL_MAP1_INDEXIf enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate color indices. SeeglMap1.GL_MAP1_NORMALIf enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate normals. SeeglMap1.GL_MAP1_TEXTURE_COORD_1If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_2If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s and t texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_3If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s, t, and r texture coordinates. SeeglMap1.GL_MAP1_TEXTURE_COORD_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate s, t, r, and q texture coordinates. SeeglMap1.GL_MAP1_VERTEX_3If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate x, y, and z vertex coordinates. SeeglMap1.GL_MAP1_VERTEX_4If enabled, calls to glEvalCoord,glEvalMesh1, andglEvalPointgenerate homogeneous x, y, z, and w vertex coordinates. SeeglMap1.GL_MAP2_COLOR_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate RGBA values. SeeglMap2.GL_MAP2_INDEXIf enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate color indices. SeeglMap2.GL_MAP2_NORMALIf enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate normals. SeeglMap2.GL_MAP2_TEXTURE_COORD_1If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_2If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s and t texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_3If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s, t, and r texture coordinates. SeeglMap2.GL_MAP2_TEXTURE_COORD_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate s, t, r, and q texture coordinates. SeeglMap2.GL_MAP2_VERTEX_3If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate x, y, and z vertex coordinates. SeeglMap2.GL_MAP2_VERTEX_4If enabled, calls to glEvalCoord,glEvalMesh2, andglEvalPointgenerate homogeneous x, y, z, and w vertex coordinates. SeeglMap2.GL_NORMALIZEIf enabled, normal vectors specified with glNormalare scaled to unit length after transformation. SeeglNormal.GL_POINT_SMOOTHIf enabled, draw points with proper filtering. Otherwise, draw aliased points. See glPointSize.GL_POLYGON_OFFSET_FILLIf enabled, and if the polygon is rendered in GL_FILLmode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. SeeglPolygonOffset.GL_POLYGON_OFFSET_LINEIf enabled, and if the polygon is rendered in GL_LINEmode, an offset is added to depth values of a polygon's fragments before the depth comparison is performed. SeeglPolygonOffset.GL_POLYGON_OFFSET_POINTIf enabled, an offset is added to depth values of a polygon's fragments before the depth comparison is performed, if the polygon is rendered in GL_POINTmode. SeeglPolygonOffset.GL_POLYGON_SMOOTHIf enabled, draw polygons with proper filtering. Otherwise, draw aliased polygons. For correct anti-aliased polygons, an alpha buffer is needed and the polygons must be sorted front to back. GL_POLYGON_STIPPLEIf enabled, use the current polygon stipple pattern when rendering polygons. See glPolygonStipple.GL_SCISSOR_TESTIf enabled, discard fragments that are outside the scissor rectangle. See glScissor.GL_STENCIL_TESTIf enabled, do stencil testing and update the stencil buffer. See glStencilFuncandglStencilOp.GL_TEXTURE_1DIf enabled, one-dimensional texturing is performed (unless two-dimensional texturing is also enabled). See glTexImage1D.GL_TEXTURE_2DIf enabled, two-dimensional texturing is performed. See glTexImage2D.GL_TEXTURE_GEN_QIf enabled, the q texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current q texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_RIf enabled, the r texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current r texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_SIf enabled, the s texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current s texture coordinate is used. SeeglTexGen.GL_TEXTURE_GEN_TIf enabled, the t texture coordinate is computed using the texture generation function defined with glTexGen. Otherwise, the current t texture coordinate is used. SeeglTexGen.- Parameter
cap Specifies a symbolic constant indicating a GL capability.
- Parameter
cap Specifies a symbolic constant indicating a GL capability.
- Throws
GL_INVALID_ENUMis generated if cap is not one of the values listed previously.GL_INVALID_OPERATIONis generated ifglEnableorglDisableis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglEnableClientState
voidglEnableClientState(intcap)- Description
glEnableClientStateandglDisableClientStateenable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. BothglEnableClientStateandglDisableClientStatetake a single argument, cap, which can assume one of the following values:GL_COLOR_ARRAYIf enabled, the color array is enabled for writing and used during rendering when glDrawArraysorglDrawElementis called. SeeglColorPointer.GL_EDGE_FLAG_ARRAYIf enabled, the edge flag array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglEdgeFlagPointer.GL_INDEX_ARRAYIf enabled, the index array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglIndexPointer.GL_NORMAL_ARRAYIf enabled, the normal array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglNormalPointer.GL_TEXTURE_COORD_ARRAYIf enabled, the texture coordinate array is enabled for writing and used for rendering when glDrawArraysorglDrawElementsis called. SeeglTexCoordPointer.GL_VERTEX_ARRAYIf enabled, the vertex array is enabled for writing and used during rendering when glDrawArraysorglDrawElementsis called. SeeglVertexPointer.- Parameter
cap Specifies the capability to enable. Symbolic constants
GL_COLOR_ARRAY,GL_EDGE_FLAG_ARRAY,GL_INDEX_ARRAY,GL_NORMAL_ARRAY,GL_TEXTURE_COORD_ARRAY, andGL_VERTEX_ARRAYare accepted.- Parameter
cap Specifies the capability to disable.
- Throws
GL_INVALID_ENUMis generated if cap is not an accepted value.glEnableClientStateis not allowed between the execution ofglBeginand the correspondingglEnd, but an error may or may not be generated. If no error is generated, the behavior is undefined.
- MethodglEnd
voidglEnd()- Description
glBeginandglEnddelimit the vertices that define a primitive or a group of like primitives.glBeginaccepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows:GL_POINTSTreats each vertex as a single point. Vertex n defines point n. N points are drawn. GL_LINESTreats each pair of vertices as an independent line segment. Vertices 2n-1 and 2n define line n. N/2 lines are drawn. GL_LINE_STRIPDraws a connected group of line segments from the first vertex to the last. Vertices n and n+1 define line n. N-1 lines are drawn. GL_LINE_LOOPDraws a connected group of line segments from the first vertex to the last, then back to the first. Vertices n and n+1 define line n. The last line, however, is defined by vertices N and 1. N lines are drawn. GL_TRIANGLESTreats each triplet of vertices as an independent triangle. Vertices 3n-2, 3n-1, and 3n define triangle n. N/3 triangles are drawn. GL_TRIANGLE_STRIPDraws a connected group of triangles. One triangle is defined for each vertex presented after the first two vertices. For odd n, vertices n, n+1, and n+2 define triangle n. For even n, vertices n+1, n, and n+2 define triangle n. N-2 triangles are drawn. GL_TRIANGLE_FANDraws a connected group of triangles. One triangle is defined for each vertex presented after the first two vertices. Vertices 1, n+1, and n+2 define triangle n. N-2 triangles are drawn. GL_QUADSTreats each group of four vertices as an independent quadrilateral. Vertices 4n-3, 4n-2, 4n-1, and 4n define quadrilateral n. N/4 quadrilaterals are drawn. GL_QUAD_STRIPDraws a connected group of quadrilaterals. One quadrilateral is defined for each pair of vertices presented after the first pair. Vertices 2n-1, 2n, 2n+2, and 2n+1 define quadrilateral n. N/2-1 quadrilaterals are drawn. Note that the order in which vertices are used to construct a quadrilateral from strip data is different from that used with independent data. GL_POLYGONDraws a single, convex polygon. Vertices 1 through N define this polygon. Only a subset of GL commands can be used between
glBeginandglEnd. The commands areglVertex,glColor,glIndex,glNormal,glTexCoord,glEvalCoord,glEvalPoint,glArrayElement,glMaterial, andglEdgeFlag. Also, it is acceptable to useglCallListorglCallListsto execute display lists that include only the preceding commands. If any other GL command is executed betweenglBeginandglEnd, the error flag is set and the command is ignored.Regardless of the value chosen for mode, there is no limit to the number of vertices that can be defined between
glBeginandglEnd. Lines, triangles, quadrilaterals, and polygons that are incompletely specified are not drawn. Incomplete specification results when either too few vertices are provided to specify even a single primitive or when an incorrect multiple of vertices is specified. The incomplete primitive is ignored; the rest are drawn.The minimum specification of vertices for each primitive is as follows: 1 for a point, 2 for a line, 3 for a triangle, 4 for a quadrilateral, and 3 for a polygon. Modes that require a certain multiple of vertices are
GL_LINES(2),GL_TRIANGLES(3),GL_QUADS(4), andGL_QUAD_STRIP(2).- Parameter
mode Specifies the primitive or primitives that will be created from vertices presented between
glBeginand the subsequentglEnd. Ten symbolic constants are accepted:GL_POINTS,GL_LINES,GL_LINE_STRIP,GL_LINE_LOOP,GL_TRIANGLES,GL_TRIANGLE_STRIP,GL_TRIANGLE_FAN,GL_QUADS,GL_QUAD_STRIP, andGL_POLYGON.- Throws
GL_INVALID_ENUMis generated if mode is set to an unaccepted value.GL_INVALID_OPERATIONis generated ifglBeginis executed between aglBeginand the corresponding execution ofglEnd.GL_INVALID_OPERATIONis generated ifglEndis executed without being preceded by aglBegin.GL_INVALID_OPERATIONis generated if a command other thanglVertex,glColor,glIndex,glNormal,glTexCoord,glEvalCoord,glEvalPoint,glArrayElement,glMaterial,glEdgeFlag,glCallList, orglCallListsis executed between the execution ofglBeginand the corresponding executionglEnd.Execution of
glEnableClientState,glDisableClientState,glEdgeFlagPointer,glTexCoordPointer,glColorPointer,glIndexPointer,glNormalPointer,glVertexPointer,glInterleavedArrays, orglPixelStoreis not allowed after a call toglBeginand before the corresponding call toglEnd, but an error may or may not be generated.
- MethodglEndList
voidglEndList()- Description
Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with
glNewList. All subsequent commands are placed in the display list, in the order issued, untilglEndListis called.glNewListhas two arguments. The first argument, list, is a positive integer that becomes the unique name for the display list. Names can be created and reserved withglGenListsand tested for uniqueness withglIsList. The second argument, mode, is a symbolic constant that can assume one of two values:GL_COMPILECommands are merely compiled. GL_COMPILE_AND_EXECUTECommands are executed as they are compiled into the display list. Certain commands are not compiled into the display list but are executed immediately, regardless of the display-list mode. These commands are
glColorPointer,glDeleteLists,glDisableClientState,glEdgeFlagPointer,glEnableClientState,glFeedbackBuffer,glFinish,glFlush,glGenLists,glIndexPointer,glInterleavedArrays,glIsEnabled,glIsList,glNormalPointer,glPopClientAttrib,glPixelStore,glPushClientAttrib,glReadPixels,glRenderMode,glSelectBuffer,glTexCoordPointer,glVertexPointer, and all of theglGetcommands.Similarly,
glTexImage2DandglTexImage1Dare executed immediately and not compiled into the display list when their first argument isGL_PROXY_TEXTURE_2DorGL_PROXY_TEXTURE_1D, respectively.When
glEndListis encountered, the display-list definition is completed by associating the list with the unique name list (specified in theglNewListcommand). If a display list with name list already exists, it is replaced only whenglEndListis called.- Parameter
list Specifies the display-list name.
- Parameter
mode Specifies the compilation mode, which can be
GL_COMPILEorGL_COMPILE_AND_EXECUTE.- Throws
GL_INVALID_VALUEis generated if list is 0.GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglEndListis called without a precedingglNewList, or ifglNewListis called while a display list is being defined.GL_INVALID_OPERATIONis generated ifglNewListorglEndListis executed between the execution ofglBeginand the corresponding execution ofglEnd.GL_OUT_OF_MEMORYis generated if there is insufficient memory to compile the display list. If the GL version is 1.1 or greater, no change is made to the previous contents of the display list, if any, and no other change is made to the GL state. (It is as if no attempt had been made to create the new display list.)
- MethodglEvalCoord
voidglEvalCoord(float|int|array(float|int)u,float|int|voidv)- Description
glEvalCoordevaluates enabled one-dimensional maps at argumentuor two-dimensional maps using two domain values,uandv. To define a map, callglMap1andglMap2; to enable and disable it, callglEnableandglDisable.When one of the
glEvalCoordcommands is issued, all currently enabled maps of the indicated dimension are evaluated. Then, for each enabled map, it is as if the corresponding GL command had been issued with the computed value. That is, ifGL_MAP1_INDEXorGL_MAP2_INDEXis enabled, aglIndexcommand is simulated. IfGL_MAP1_COLOR_4orGL_MAP2_COLOR_4is enabled, aglColorcommand is simulated. IfGL_MAP1_NORMALorGL_MAP2_NORMALis enabled, a normal vector is produced, and if any ofGL_MAP1_TEXTURE_COORD_1,GL_MAP1_TEXTURE_COORD_2,GL_MAP1_TEXTURE_COORD_3,GL_MAP1_TEXTURE_COORD_4,GL_MAP2_TEXTURE_COORD_1,GL_MAP2_TEXTURE_COORD_2,GL_MAP2_TEXTURE_COORD_3, orGL_MAP2_TEXTURE_COORD_4is enabled, then an appropriateglTexCoordcommand is simulated.For color, color index, normal, and texture coordinates the GL uses evaluated values instead of current values for those evaluations that are enabled, and current values otherwise, However, the evaluated values do not update the current values. Thus, if
glVertexcommands are interspersed withglEvalCoordcommands, the color, normal, and texture coordinates associated with theglVertexcommands are not affected by the values generated by theglEvalCoordcommands, but only by the most recentglColor,glIndex,glNormal, andglTexCoordcommands.No commands are issued for maps that are not enabled. If more than one texture evaluation is enabled for a particular dimension (for example,
GL_MAP2_TEXTURE_COORD_1andGL_MAP2_TEXTURE_COORD_2), then only the evaluation of the map that produces the larger number of coordinates (in this case,GL_MAP2_TEXTURE_COORD_2) is carried out.GL_MAP1_VERTEX_4overridesGL_MAP1_VERTEX_3, andGL_MAP2_VERTEX_4overridesGL_MAP2_VERTEX_3, in the same manner. If neither a three- nor a four-component vertex map is enabled for the specified dimension, theglEvalCoordcommand is ignored.If you have enabled automatic normal generation, by calling
glEnablewith argumentGL_AUTO_NORMAL,glEvalCoordgenerates surface normals analytically, regardless of the contents or enabling of theGL_MAP2_NORMALmap. Let .sp .nf Pp Pp m = -- X -- Pu Pv .sp .fiThen the generated normal n is
n = m over ~ over { || m || }
.sp
If automatic normal generation is disabled, the corresponding normal map
GL_MAP2_NORMAL, if enabled, is used to produce a normal. If neither automatic normal generation nor a normal map is enabled, no normal is generated forglEvalCoordcommands.- Parameter
u Specifies a value that is the domain coordinate u to the basis function defined in a previous
glMap1orglMap2command.- Parameter
v Specifies a value that is the domain coordinate v to the basis function defined in a previous
glMap2command.- Parameter
u Specifies a pointer to an array containing either one or two domain coordinates. The first coordinate is u. The second coordinate is v.
- MethodglEvalPoint
voidglEvalPoint(int|array(int)i,int|voidj)- Description
glMapGridandglEvalMeshare used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values.glEvalPointcan be used to evaluate a single grid point in the same gridspace that is traversed byglEvalMesh. CallingglEvalPointis equivalent to calling .nfglEvalCoord1(i . DELTA u + u ); 1 where
DELTA u = (u - u ) / n 2 1
and n, u , and u 1 2
.fi are the arguments to the most recent
glMapGrid1command. The one absolute numeric requirement is that if i~=~n, then the value computed from .nf i . DELTA u + u is exactly u . 1 2.fi
In the two-dimensional case,
glEvalPoint, let .nf DELTA u = (u - u )/n 2 1DELTA v = (v - v )/m 2 1
where n, u , u , m, v , and v 1 2 1 2
.fi are the arguments to the most recent
glMapGrid2command. Then theglEvalPointcommand is equivalent to calling .nfglEvalCoord2(i . DELTA u + u , j . DELTA v + v ); 1 1
.fi The only absolute numeric requirements are that if i~=~n, then the value computed from .nf
i . DELTA u + u is exactly u , 1 2 .fi and if j~=~m, then the value computed from .nf
j cdot DELTA v + v is exactly v . 1 2
- Parameter
i Specifies the integer value for grid domain variable i.
- Parameter
j Specifies the integer value for grid domain variable j (
glEvalPointonly).
- MethodglFinish
voidglFinish()- Description
glFinishdoes not return until the effects of all previously called GL commands are complete. Such effects include all changes to GL state, all changes to connection state, and all changes to the frame buffer contents.- Throws
GL_INVALID_OPERATIONis generated ifglFinishis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglFlush
voidglFlush()- Description
Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself.
glFlushempties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine. Though this execution may not be completed in any particular time period, it does complete in finite time.Because any GL program might be executed over a network, or on an accelerator that buffers commands, all programs should call
glFlushwhenever they count on having all of their previously issued commands completed. For example, callglFlushbefore waiting for user input that depends on the generated image.- Throws
GL_INVALID_OPERATIONis generated ifglFlushis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglFog
voidglFog(intpname,float|int|array(float|int)param)- Description
Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps, and pixel blocks, but not buffer clear operations. To enable and disable fog, call
glEnableandglDisablewith argumentGL_FOG.glFogassigns the value or values in params to the fog parameter specified by pname. The following values are accepted for pname:GL_FOG_MODEparams is a single integer or floating-point value that specifies the equation to be used to compute the fog blend factor, f. Three symbolic constants are accepted: GL_LINEAR,GL_EXP, andGL_EXP2. The equations corresponding to these symbolic constants are defined below. The initial fog mode isGL_EXP.GL_FOG_DENSITYparams is a single integer or floating-point value that specifies density, the fog density used in both exponential fog equations. Only nonnegative densities are accepted. The initial fog density is 1. GL_FOG_STARTparams is a single integer or floating-point value that specifies start, the near distance used in the linear fog equation. The initial near distance is 0. GL_FOG_ENDparams is a single integer or floating-point value that specifies end, the far distance used in the linear fog equation. The initial far distance is 1. GL_FOG_INDEXparams is a single integer or floating-point value that specifies i sub f, the fog color index. The initial fog index is 0. GL_FOG_COLORparams contains four integer or floating-point values that specify C sub f, the fog color. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. After conversion, all color components are clamped to the range [0,1]. The initial fog color is (0, 0, 0, 0). Fog blends a fog color with each rasterized pixel fragment's posttexturing color using a blending factor f. Factor f is computed in one of three ways, depending on the fog mode. Let z be the distance in eye coordinates from the origin to the fragment being fogged. The equation for
GL_LINEARfog is .ce.EQ f ~=~ {end ~-~ z} over {end ~-~ start} .EN
.RE
The equation for
GL_EXPfog is .ce.EQ f ~=~ e ** (-(density ~cdot~ z)) .EN
The equation for
GL_EXP2fog is .ce.EQ f ~=~ e ** (-(density ~cdot~ z) ** 2) .EN
Regardless of the fog mode, f is clamped to the range [0,1] after it is computed. Then, if the GL is in RGBA color mode, the fragment's color C sub r is replaced by .sp .ce .EQ {C sub r} prime ~=~ f C sub r + (1 - f) C sub f .EN
In color index mode, the fragment's color index i sub r is replaced by .sp .ce .EQ {i sub r} prime ~=~ i sub r + (1 - f) i sub f .EN
- Parameter
pname Specifies a single-valued fog parameter.
GL_FOG_MODE,GL_FOG_DENSITY,GL_FOG_START,GL_FOG_END, andGL_FOG_INDEXare accepted.- Parameter
param Specifies the value that pname will be set to.
- Parameter
pname Specifies a fog parameter.
GL_FOG_MODE,GL_FOG_DENSITY,GL_FOG_START,GL_FOG_END,GL_FOG_INDEX, andGL_FOG_COLORare accepted.- Parameter
params Specifies the value or values to be assigned to pname.
GL_FOG_COLORrequires an array of four values. All other parameters accept an array containing only a single value.- Throws
GL_INVALID_ENUMis generated if pname is not an accepted value, or if pname isGL_FOG_MODEand params is not an accepted value.GL_INVALID_VALUEis generated if pname isGL_FOG_DENSITY, and params is negative.GL_INVALID_OPERATIONis generated ifglFogis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglFrontFace
voidglFrontFace(intmode)- Description
In a scene composed entirely of opaque closed surfaces, back-facing polygons are never visible. Eliminating these invisible polygons has the obvious benefit of speeding up the rendering of the image. To enable and disable elimination of back-facing polygons, call
glEnableandglDisablewith argumentGL_CULL_FACE.The projection of a polygon to window coordinates is said to have clockwise winding if an imaginary object following the path from its first vertex, its second vertex, and so on, to its last vertex, and finally back to its first vertex, moves in a clockwise direction about the interior of the polygon. The polygon's winding is said to be counterclockwise if the imaginary object following the same path moves in a counterclockwise direction about the interior of the polygon.
glFrontFacespecifies whether polygons with clockwise winding in window coordinates, or counterclockwise winding in window coordinates, are taken to be front-facing. PassingGL_CCWto mode selects counterclockwise polygons as front-facing;GL_CWselects clockwise polygons as front-facing. By default, counterclockwise polygons are taken to be front-facing.- Parameter
mode Specifies the orientation of front-facing polygons.
GL_CWandGL_CCWare accepted. The initial value isGL_CCW.- Throws
GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglFrontFaceis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglFrustum
voidglFrustum(floatleft,floatright,floatbottom,floattop,floatzNear,floatzFar)- Description
glFrustumdescribes a perspective matrix that produces a perspective projection. The current matrix (seeglMatrixMode) is multiplied by this matrix and the result replaces the current matrix, as ifglMultMatrixwere called with the following matrix as its argument:.sp 5 .ce .EQ down 130 {left ( ~~ matrix { ccol { {{2 ~ "zNear"} over {"right" - "left"}} above 0 above 0 above 0 } ccol { 0 above {{2 ~ "zNear"} over {"top" - "bottom"}} ~ above 0 above 0 } ccol { A ~~~~ above B ~~~~ above C ~~~~ above -1 ~~~~} ccol { 0 above 0 above D above 0} } ~~~ right )} .EN .sp .ce .EQ down 130 {A ~=~ {"right" + "left"} over {"right" - "left"}} .EN .sp .ce .EQ down 130 {B ~=~ {"top" + "bottom"} over {"top" - "bottom"}} .EN .sp .ce .EQ down 130 {C ~=~ -{{"zFar" + "zNear"} over {"zFar" - "zNear"}}} .EN .sp .ce .EQ down 130 {D ~=~ -{{2 ~ "zFar" ~ "zNear"} over {"zFar" - "zNear"}}} .EN .sp
Typically, the matrix mode is
GL_PROJECTION, and (left, bottom, -zNear) and (right, top, -zNear) specify the points on the near clipping plane that are mapped to the lower left and upper right corners of the window, assuming that the eye is located at (0, 0, 0). -zFar specifies the location of the far clipping plane. Both zNear and zFar must be positive.Use
glPushMatrixandglPopMatrixto save and restore the current matrix stack.- Parameter
left Specify the coordinates for the left and right vertical clipping planes.
- Parameter
bottom Specify the coordinates for the bottom and top horizontal clipping planes.
- Parameter
zNear Specify the distances to the near and far depth clipping planes. Both distances must be positive.
- Throws
GL_INVALID_VALUEis generated if zNear or zFar is not positive.GL_INVALID_OPERATIONis generated ifglFrustumis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglGenLists
intglGenLists(intrange)- Description
glGenListshas one argument, range. It returns an integer n such that range contiguous empty display lists, named n, n+1, ..., n+range -1, are created. If range is 0, if there is no group of range contiguous names available, or if any error is generated, no display lists are generated, and 0 is returned.- Parameter
range Specifies the number of contiguous empty display lists to be generated.
- Throws
GL_INVALID_VALUEis generated if range is negative.GL_INVALID_OPERATIONis generated ifglGenListsis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglGetError
intglGetError()- Description
glGetErrorreturns the value of the error flag. Each detectable error is assigned a numeric code and symbolic name. When an error occurs, the error flag is set to the appropriate error code value. No other errors are recorded untilglGetErroris called, the error code is returned, and the flag is reset toGL_NO_ERROR. If a call toglGetErrorreturnsGL_NO_ERROR, there has been no detectable error since the last call toglGetError, or since the GL was initialized.To allow for distributed implementations, there may be several error flags. If any single error flag has recorded an error, the value of that flag is returned and that flag is reset to
GL_NO_ERRORwhenglGetErroris called. If more than one flag has recorded an error,glGetErrorreturns and clears an arbitrary error flag value. Thus,glGetErrorshould always be called in a loop, until it returnsGL_NO_ERROR, if all error flags are to be reset.Initially, all error flags are set to
GL_NO_ERROR.The following errors are currently defined:
GL_NO_ERRORNo error has been recorded. The value of this symbolic constant is guaranteed to be 0. GL_INVALID_ENUMAn unacceptable value is specified for an enumerated argument. The offending command is ignored, and has no other side effect than to set the error flag. GL_INVALID_VALUEA numeric argument is out of range. The offending command is ignored, and has no other side effect than to set the error flag. GL_INVALID_OPERATIONThe specified operation is not allowed in the current state. The offending command is ignored, and has no other side effect than to set the error flag. GL_STACK_OVERFLOWThis command would cause a stack overflow. The offending command is ignored, and has no other side effect than to set the error flag. GL_STACK_UNDERFLOWThis command would cause a stack underflow. The offending command is ignored, and has no other side effect than to set the error flag. GL_OUT_OF_MEMORYThere is not enough memory left to execute the command. The state of the GL is undefined, except for the state of the error flags, after this error is recorded. When an error flag is set, results of a GL operation are undefined only if
GL_OUT_OF_MEMORYhas occurred. In all other cases, the command generating the error is ignored and has no effect on the GL state or frame buffer contents. If the generating command returns a value, it returns 0. IfglGetErroritself generates an error, it returns 0.- Throws
GL_INVALID_OPERATIONis generated ifglGetErroris executed between the execution ofglBeginand the corresponding execution ofglEnd. In this caseglGetErrorreturns 0.
- MethodglGetString
stringglGetString(intname)- Description
glGetStringreturns a pointer to a static string describing some aspect of the current GL connection. name can be one of the following:GL_VENDORReturns the company responsible for this GL implementation. This name does not change from release to release. GL_RENDERERReturns the name of the renderer. This name is typically specific to a particular configuration of a hardware platform. It does not change from release to release. GL_VERSIONReturns a version or release number. GL_EXTENSIONSReturns a space-separated list of supported extensions to GL. Because the GL does not include queries for the performance characteristics of an implementation, some applications are written to recognize known platforms and modify their GL usage based on known performance characteristics of these platforms. Strings
GL_VENDORandGL_RENDERERtogether uniquely specify a platform. They do not change from release to release and should be used by platform-recognition algorithms.Some applications want to make use of features that are not part of the standard GL. These features may be implemented as extensions to the standard GL. The
GL_EXTENSIONSstring is a space-separated list of supported GL extensions. (Extension names never contain a space character.)The
GL_VERSIONstring begins with a version number. The version number uses one of these forms:major_number.minor_number
major_number.minor_number.release_number
Vendor-specific information may follow the version number. Its format depends on the implementation, but a space always separates the version number and the vendor-specific information.
All strings are null-terminated.
- Parameter
name Specifies a symbolic constant, one of
GL_VENDOR,GL_RENDERER,GL_VERSION, orGL_EXTENSIONS.- Throws
GL_INVALID_ENUMis generated if name is not an accepted value.GL_INVALID_OPERATIONis generated ifglGetStringis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglHint
voidglHint(inttarget,intmode)- Description
Certain aspects of GL behavior, when there is room for interpretation, can be controlled with hints. A hint is specified with two arguments. target is a symbolic constant indicating the behavior to be controlled, and mode is another symbolic constant indicating the desired behavior. The initial value for each target is
GL_DONT_CARE. mode can be one of the following:GL_FASTESTThe most efficient option should be chosen. GL_NICESTThe most correct, or highest quality, option should be chosen. GL_DONT_CARENo preference. Though the implementation aspects that can be hinted are well defined, the interpretation of the hints depends on the implementation. The hint aspects that can be specified with target, along with suggested semantics, are as follows:
GL_FOG_HINTIndicates the accuracy of fog calculation. If per-pixel fog calculation is not efficiently supported by the GL implementation, hinting GL_DONT_CAREorGL_FASTESTcan result in per-vertex calculation of fog effects.GL_LINE_SMOOTH_HINTIndicates the sampling quality of antialiased lines. If a larger filter function is applied, hinting GL_NICESTcan result in more pixel fragments being generated during rasterization,GL_PERSPECTIVE_CORRECTION_HINTIndicates the quality of color and texture coordinate interpolation. If perspective-corrected parameter interpolation is not efficiently supported by the GL implementation, hinting GL_DONT_CAREorGL_FASTESTcan result in simple linear interpolation of colors and/or texture coordinates.GL_POINT_SMOOTH_HINTIndicates the sampling quality of antialiased points. If a larger filter function is applied, hinting GL_NICESTcan result in more pixel fragments being generated during rasterization,GL_POLYGON_SMOOTH_HINTIndicates the sampling quality of antialiased polygons. Hinting GL_NICESTcan result in more pixel fragments being generated during rasterization, if a larger filter function is applied.- Parameter
target Specifies a symbolic constant indicating the behavior to be controlled.
GL_FOG_HINT,GL_LINE_SMOOTH_HINT,GL_PERSPECTIVE_CORRECTION_HINT,GL_POINT_SMOOTH_HINT, andGL_POLYGON_SMOOTH_HINTare accepted.- Parameter
mode Specifies a symbolic constant indicating the desired behavior.
GL_FASTEST,GL_NICEST, andGL_DONT_CAREare accepted.- Throws
GL_INVALID_ENUMis generated if either target or mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglHintis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglIndex
voidglIndex(float|intc)- Description
glIndexupdates the current (single-valued) color index. It takes one argument, the new value for the current color index.The current index is stored as a floating-point value. Integer values are converted directly to floating-point values, with no special mapping. The initial value is 1.
Index values outside the representable range of the color index buffer are not clamped. However, before an index is dithered (if enabled) and written to the frame buffer, it is converted to fixed-point format. Any bits in the integer portion of the resulting fixed-point value that do not correspond to bits in the frame buffer are masked out.
- Parameter
c Specifies the new value for the current color index.
- Parameter
c Specifies a pointer to a one-element array that contains the new value for the current color index.
- MethodglIndexMask
voidglIndexMask(intmask)- Description
glIndexMaskcontrols the writing of individual bits in the color index buffers. The least significant n bits of mask, where n is the number of bits in a color index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is write-protected.This mask is used only in color index mode, and it affects only the buffers currently selected for writing (see
glDrawBuffer). Initially, all bits are enabled for writing.- Parameter
mask Specifies a bit mask to enable and disable the writing of individual bits in the color index buffers. Initially, the mask is all 1's.
- Throws
GL_INVALID_OPERATIONis generated ifglIndexMaskis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglInitNames
voidglInitNames()- Description
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers.
glInitNamescauses the name stack to be initialized to its default empty state.The name stack is always empty while the render mode is not
GL_SELECT. Calls toglInitNameswhile the render mode is notGL_SELECTare ignored.- Throws
GL_INVALID_OPERATIONis generated ifglInitNamesis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglIsEnabled
intglIsEnabled(intcap)- Description
glIsEnabledreturnsGL_TRUEif cap is an enabled capability and returnsGL_FALSEotherwise. Initially all capabilities exceptGL_DITHERare disabled;GL_DITHERis initially enabled.The following capabilities are accepted for cap:
.TS lb lb l l l. Constant See _
GL_ALPHA_TESTglAlphaFuncGL_AUTO_NORMALglEvalCoordGL_BLENDglBlendFunc,glLogicOpGL_CLIP_PLANEiglClipPlaneGL_COLOR_ARRAYglColorPointerGL_COLOR_LOGIC_OPglLogicOpGL_COLOR_MATERIALglColorMaterialGL_CULL_FACEglCullFaceGL_DEPTH_TESTglDepthFunc,glDepthRangeGL_DITHERglEnableGL_EDGE_FLAG_ARRAYglEdgeFlagPointerGL_FOGglFogGL_INDEX_ARRAYglIndexPointerGL_INDEX_LOGIC_OPglLogicOpGL_LIGHTiglLightModel,glLightGL_LIGHTINGglMaterial,glLightModel,glLightGL_LINE_SMOOTHglLineWidthGL_LINE_STIPPLEglLineStippleGL_MAP1_COLOR_4glMap1,glMap2GL_MAP2_TEXTURE_COORD_2glMap2GL_MAP2_TEXTURE_COORD_3glMap2GL_MAP2_TEXTURE_COORD_4glMap2GL_MAP2_VERTEX_3glMap2GL_MAP2_VERTEX_4glMap2GL_NORMAL_ARRAYglNormalPointerGL_NORMALIZEglNormalGL_POINT_SMOOTHglPointSizeGL_POLYGON_SMOOTHglPolygonModeGL_POLYGON_OFFSET_FILLglPolygonOffsetGL_POLYGON_OFFSET_LINEglPolygonOffsetGL_POLYGON_OFFSET_POINTglPolygonOffsetGL_POLYGON_STIPPLEglPolygonStippleGL_SCISSOR_TESTglScissorGL_STENCIL_TESTglStencilFunc,glStencilOpGL_TEXTURE_1DglTexImage1DGL_TEXTURE_2DglTexImage2DGL_TEXTURE_COORD_ARRAYglTexCoordPointerGL_TEXTURE_GEN_QglTexGenGL_TEXTURE_GEN_RglTexGenGL_TEXTURE_GEN_SglTexGenGL_TEXTURE_GEN_TglTexGenGL_VERTEX_ARRAYglVertexPointer.TE- Parameter
cap Specifies a symbolic constant indicating a GL capability.
- Throws
GL_INVALID_ENUMis generated if cap is not an accepted value.GL_INVALID_OPERATIONis generated ifglIsEnabledis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglIsList
intglIsList(intlist)- Description
glIsListreturnsGL_TRUEif list is the name of a display list and returnsGL_FALSEotherwise.- Parameter
list Specifies a potential display-list name.
- Throws
GL_INVALID_OPERATIONis generated ifglIsListis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglIsTexture
intglIsTexture(inttexture)- Description
glIsTexturereturnsGL_TRUEif texture is currently the name of a texture. If texture is zero, or is a non-zero value that is not currently the name of a texture, or if an error occurs,glIsTexturereturnsGL_FALSE.- Parameter
texture Specifies a value that may be the name of a texture.
- Throws
GL_INVALID_OPERATIONis generated ifglIsTextureis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLight
voidglLight(intlight,intpname,float|int|array(float|int)param)- Description
glLightsets the values of individual light source parameters. light names the light and is a symbolic name of the formGL_LIGHTi, where 0 \(<= i <GL_MAX_LIGHTS. pname specifies one of ten light source parameters, again by symbolic name. params is either a single value or a pointer to an array that contains the new values.To enable and disable lighting calculation, call
glEnableandglDisablewith argumentGL_LIGHTING. Lighting is initially disabled. When it is enabled, light sources that are enabled contribute to the lighting calculation. Light source i is enabled and disabled usingglEnableandglDisablewith argumentGL_LIGHTi.The ten light parameters are as follows:
GL_AMBIENTparams contains four integer or floating-point values that specify the ambient RGBA intensity of the light. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial ambient light intensity is (0, 0, 0, 1). GL_DIFFUSEparams contains four integer or floating-point values that specify the diffuse RGBA intensity of the light. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial value for GL_LIGHT0is (1, 1, 1, 1); for other lights, the initial value is (0, 0, 0, 0).GL_SPECULARparams contains four integer or floating-point values that specify the specular RGBA intensity of the light. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial value for GL_LIGHT0is (1, 1, 1, 1); for other lights, the initial value is (0, 0, 0, 0).GL_POSITIONparams contains four integer or floating-point values that specify the position of the light in homogeneous object coordinates. Both integer and floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The position is transformed by the modelview matrix when glLightis called (just as if it were a point), and it is stored in eye coordinates. If the w component of the position is 0, the light is treated as a directional source. Diffuse and specular lighting calculations take the light's direction, but not its actual position, into account, and attenuation is disabled. Otherwise, diffuse and specular lighting calculations are based on the actual location of the light in eye coordinates, and attenuation is enabled. The initial position is (0, 0, 1, 0); thus, the initial light source is directional, parallel to, and in the direction of the -z axis.GL_SPOT_DIRECTIONparams contains three integer or floating-point values that specify the direction of the light in homogeneous object coordinates. Both integer and floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The spot direction is transformed by the inverse of the modelview matrix when glLightis called (just as if it were a normal), and it is stored in eye coordinates. It is significant only whenGL_SPOT_CUTOFFis not 180, which it is initially. The initial direction is (0, 0, -1).GL_SPOT_EXPONENTparams is a single integer or floating-point value that specifies the intensity distribution of the light. Integer and floating-point values are mapped directly. Only values in the range [0,128] are accepted. Effective light intensity is attenuated by the cosine of the angle between the direction of the light and the direction from the light to the vertex being lighted, raised to the power of the spot exponent. Thus, higher spot exponents result in a more focused light source, regardless of the spot cutoff angle (see GL_SPOT_CUTOFF, next paragraph). The initial spot exponent is 0, resulting in uniform light distribution.GL_SPOT_CUTOFFparams is a single integer or floating-point value that specifies the maximum spread angle of a light source. Integer and floating-point values are mapped directly. Only values in the range [0,90] and the special value 180 are accepted. If the angle between the direction of the light and the direction from the light to the vertex being lighted is greater than the spot cutoff angle, the light is completely masked. Otherwise, its intensity is controlled by the spot exponent and the attenuation factors. The initial spot cutoff is 180, resulting in uniform light distribution. GL_CONSTANT_ATTENUATIONGL_LINEAR_ATTENUATIONGL_QUADRATIC_ATTENUATIONparams is a single integer or floating-point value that specifies one of the three light attenuation factors. Integer and floating-point values are mapped directly. Only nonnegative values are accepted. If the light is positional, rather than directional, its intensity is attenuated by the reciprocal of the sum of the constant factor, the linear factor times the distance between the light and the vertex being lighted, and the quadratic factor times the square of the same distance. The initial attenuation factors are (1, 0, 0), resulting in no attenuation. - Parameter
light Specifies a light. The number of lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form
GL_LIGHTi where 0 \(<= i <GL_MAX_LIGHTS.- Parameter
pname Specifies a single-valued light source parameter for light.
GL_SPOT_EXPONENT,GL_SPOT_CUTOFF,GL_CONSTANT_ATTENUATION,GL_LINEAR_ATTENUATION, andGL_QUADRATIC_ATTENUATIONare accepted.- Parameter
param Specifies the value that parameter pname of light source light will be set to.
- Parameter
light Specifies a light. The number of lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form
GL_LIGHTi where 0 \(<= i <GL_MAX_LIGHTS.- Parameter
pname Specifies a light source parameter for light.
GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR,GL_POSITION,GL_SPOT_CUTOFF,GL_SPOT_DIRECTION,GL_SPOT_EXPONENT,GL_CONSTANT_ATTENUATION,GL_LINEAR_ATTENUATION, andGL_QUADRATIC_ATTENUATIONare accepted.- Parameter
params Specifies a pointer to the value or values that parameter pname of light source light will be set to.
- Throws
GL_INVALID_ENUMis generated if either light or pname is not an accepted value.GL_INVALID_VALUEis generated if a spot exponent value is specified outside the range [0,128], or if spot cutoff is specified outside the range [0,90] (except for the special value 180), or if a negative attenuation factor is specified.GL_INVALID_OPERATIONis generated ifglLightis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLightModel
voidglLightModel(intpname,float|int|array(float|int)param)- Description
glLightModelsets the lighting model parameter. pname names a parameter and params gives the new value. There are three lighting model parameters:GL_LIGHT_MODEL_AMBIENTparams contains four integer or floating-point values that specify the ambient RGBA intensity of the entire scene. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial ambient scene intensity is (0.2, 0.2, 0.2, 1.0). GL_LIGHT_MODEL_LOCAL_VIEWERparams is a single integer or floating-point value that specifies how specular reflection angles are computed. If params is 0 (or 0.0), specular reflection angles take the view direction to be parallel to and in the direction of the -z axis, regardless of the location of the vertex in eye coordinates. Otherwise, specular reflections are computed from the origin of the eye coordinate system. The initial value is 0. GL_LIGHT_MODEL_TWO_SIDEparams is a single integer or floating-point value that specifies whether one- or two-sided lighting calculations are done for polygons. It has no effect on the lighting calculations for points, lines, or bitmaps. If params is 0 (or 0.0), one-sided lighting is specified, and only the front material parameters are used in the lighting equation. Otherwise, two-sided lighting is specified. In this case, vertices of back-facing polygons are lighted using the back material parameters, and have their normals reversed before the lighting equation is evaluated. Vertices of front-facing polygons are always lighted using the front material parameters, with no change to their normals. The initial value is 0. In RGBA mode, the lighted color of a vertex is the sum of the material emission intensity, the product of the material ambient reflectance and the lighting model full-scene ambient intensity, and the contribution of each enabled light source. Each light source contributes the sum of three terms: ambient, diffuse, and specular. The ambient light source contribution is the product of the material ambient reflectance and the light's ambient intensity. The diffuse light source contribution is the product of the material diffuse reflectance, the light's diffuse intensity, and the dot product of the vertex's normal with the normalized vector from the vertex to the light source. The specular light source contribution is the product of the material specular reflectance, the light's specular intensity, and the dot product of the normalized vertex-to-eye and vertex-to-light vectors, raised to the power of the shininess of the material. All three light source contributions are attenuated equally based on the distance from the vertex to the light source and on light source direction, spread exponent, and spread cutoff angle. All dot products are replaced with 0 if they evaluate to a negative value.
The alpha component of the resulting lighted color is set to the alpha value of the material diffuse reflectance.
In color index mode, the value of the lighted index of a vertex ranges from the ambient to the specular values passed to
glMaterialusingGL_COLOR_INDEXES. Diffuse and specular coefficients, computed with a (.30, .59, .11) weighting of the lights' colors, the shininess of the material, and the same reflection and attenuation equations as in the RGBA case, determine how much above ambient the resulting index is.- Parameter
pname Specifies a single-valued lighting model parameter.
GL_LIGHT_MODEL_LOCAL_VIEWERandGL_LIGHT_MODEL_TWO_SIDEare accepted.- Parameter
param Specifies the value that param will be set to.
- Parameter
pname Specifies a lighting model parameter.
GL_LIGHT_MODEL_AMBIENT,GL_LIGHT_MODEL_LOCAL_VIEWER, andGL_LIGHT_MODEL_TWO_SIDEare accepted.- Parameter
params Specifies a pointer to the value or values that params will be set to.
- Throws
GL_INVALID_ENUMis generated if pname is not an accepted value.GL_INVALID_OPERATIONis generated ifglLightModelis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLineStipple
voidglLineStipple(intfactor,intpattern)- Description
Line stippling masks out certain fragments produced by rasterization; those fragments will not be drawn. The masking is achieved by using three parameters: the 16-bit line stipple pattern pattern, the repeat count factor, and an integer stipple counter s.
Counter s is reset to 0 whenever
glBeginis called, and before each line segment of aglBegin(GL_LINES)/glEndsequence is generated. It is incremented after each fragment of a unit width aliased line segment is generated, or after each i fragments of an i width line segment are generated. The i fragments associated with count s are masked out if .sp .ce pattern bit (s ~/~ "factor") ~roman mod~ 16 .sp is 0, otherwise these fragments are sent to the frame buffer. Bit zero of pattern is the least significant bit.Antialiased lines are treated as a sequence of 1 times width rectangles for purposes of stippling. Whether rectagle s is rasterized or not depends on the fragment rule described for aliased lines, counting rectangles rather than groups of fragments.
To enable and disable line stippling, call
glEnableandglDisablewith argumentGL_LINE_STIPPLE. When enabled, the line stipple pattern is applied as described above. When disabled, it is as if the pattern were all 1's. Initially, line stippling is disabled.- Parameter
factor Specifies a multiplier for each bit in the line stipple pattern. If factor is 3, for example, each bit in the pattern is used three times before the next bit in the pattern is used. factor is clamped to the range [1, 256] and defaults to 1.
- Parameter
pattern Specifies a 16-bit integer whose bit pattern determines which fragments of a line will be drawn when the line is rasterized. Bit zero is used first; the default pattern is all 1's.
- Throws
GL_INVALID_OPERATIONis generated ifglLineStippleis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLineWidth
voidglLineWidth(floatwidth)- Description
glLineWidthspecifies the rasterized width of both aliased and antialiased lines. Using a line width other than 1 has different effects, depending on whether line antialiasing is enabled. To enable and disable line antialiasing, callglEnableandglDisablewith argumentGL_LINE_SMOOTH. Line antialiasing is initially disabled.If line antialiasing is disabled, the actual width is determined by rounding the supplied width to the nearest integer. (If the rounding results in the value 0, it is as if the line width were 1.) If .nf | DELTA x | >= | DELTA y |, .fi i pixels are filled in each column that is rasterized, where i is the rounded value of width. Otherwise, i pixels are filled in each row that is rasterized.
If antialiasing is enabled, line rasterization produces a fragment for each pixel square that intersects the region lying within the rectangle having width equal to the current line width, length equal to the actual length of the line, and centered on the mathematical line segment. The coverage value for each fragment is the window coordinate area of the intersection of the rectangular region with the corresponding pixel square. This value is saved and used in the final rasterization step.
Not all widths can be supported when line antialiasing is enabled. If an unsupported width is requested, the nearest supported width is used. Only width 1 is guaranteed to be supported; others depend on the implementation. To query the range of supported widths and the size difference between supported widths within the range, call
glGetwith argumentsGL_LINE_WIDTH_RANGEandGL_LINE_WIDTH_GRANULARITY.- Parameter
width Specifies the width of rasterized lines. The initial value is 1.
- Throws
GL_INVALID_VALUEis generated if width is less than or equal to 0.GL_INVALID_OPERATIONis generated ifglLineWidthis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglListBase
voidglListBase(intbase)- Description
glCallListsspecifies an array of offsets. Display-list names are generated by adding base to each offset. Names that reference valid display lists are executed; the others are ignored.- Parameter
base Specifies an integer offset that will be added to
glCallListsoffsets to generate display-list names. The initial value is 0.- Throws
GL_INVALID_OPERATIONis generated ifglListBaseis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLoadIdentity
voidglLoadIdentity()- Description
glLoadIdentityreplaces the current matrix with the identity matrix. It is semantically equivalent to callingglLoadMatrixwith the identity matrix.ce
.EQ left ( down 20 { ~ matrix { ccol { 1 above 0 above 0 above 0~ } ccol { 0 above 1 above 0 above 0~ } ccol { 0 above 0 above 1 above 0~ } ccol { 0 above 0 above 0 above 1 } } } ~~ right ) .EN
but in some cases it is more efficient.
- Throws
GL_INVALID_OPERATIONis generated ifglLoadIdentityis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLoadMatrix
voidglLoadMatrix(array(array(float|int))m)- Description
glLoadMatrixreplaces the current matrix with the one whose elements are specified by m. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (seeglMatrixMode).The current matrix, M, defines a transformation of coordinates. For instance, assume M refers to the modelview matrix. If v ~=~ (v[0], v[1], v[2], v[3]) is the set of object coordinates of a vertex, and m points to an array of 16 single- or double-precision floating-point values m[0], m[1],. . .,m[15], then the modelview transformation M(v) does the following:
.ce .EQ down 130 {M(v) ~ = ~ {{ left ( matrix { ccol { ~m[0] above m[1] above m[2] above m[3] ~} ccol { ~m[4] above m[5] above m[6] above m[7] ~} ccol { ~m[8] above m[9] above m[10] above m[11] ~} ccol { ~m[12]~ above m[13]~ above m[14]~ above m[15]~} } right ) } ~~ times ~~ {left ( matrix { ccol { ~v[0]~ above ~v[1]~ above ~v[2]~ above ~v[3]~ } } right )} }} .EN
.sp
Where 'times' denotes matrix multiplication.
Projection and texture transformations are similarly defined.
- Parameter
m Specifies a pointer to 16 consecutive values, which are used as the elements of a 4 times 4 column-major matrix.
- Throws
GL_INVALID_OPERATIONis generated ifglLoadMatrixis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLoadName
voidglLoadName(intname)- Description
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers.
glLoadNamecauses name to replace the value on the top of the name stack, which is initially empty.The name stack is always empty while the render mode is not
GL_SELECT. Calls toglLoadNamewhile the render mode is notGL_SELECTare ignored.- Parameter
name Specifies a name that will replace the top value on the name stack.
- Throws
GL_INVALID_OPERATIONis generated ifglLoadNameis called while the name stack is empty.GL_INVALID_OPERATIONis generated ifglLoadNameis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglLogicOp
voidglLogicOp(intopcode)- Description
glLogicOpspecifies a logical operation that, when enabled, is applied between the incoming color index or RGBA color and the color index or RGBA color at the corresponding location in the frame buffer. To enable or disable the logical operation, callglEnableandglDisableusing the symbolic constantGL_COLOR_LOGIC_OPfor RGBA mode orGL_INDEX_LOGIC_OPfor color index mode. The initial value is disabled for both operations..ne .TS center box ; ci | ci c | c . opcode resulting value =
GL_CLEAR0GL_SET1GL_COPYsGL_COPY_INVERTED~sGL_NOOPdGL_INVERT~dGL_ANDs & dGL_NAND~(s & d)GL_ORs | dGL_NOR~(s | d)GL_XORs ^ dGL_EQUIV~(s ^ d)GL_AND_REVERSEs & ~dGL_AND_INVERTED~s & dGL_OR_REVERSEs | ~dGL_OR_INVERTED~s | d .TEopcode is a symbolic constant chosen from the list above. In the explanation of the logical operations, s represents the incoming color index and d represents the index in the frame buffer. Standard C-language operators are used. As these bitwise operators suggest, the logical operation is applied independently to each bit pair of the source and destination indices or colors.
- Parameter
opcode Specifies a symbolic constant that selects a logical operation. The following symbols are accepted:
GL_CLEAR,GL_SET,GL_COPY,GL_COPY_INVERTED,GL_NOOP,GL_INVERT,GL_AND,GL_NAND,GL_OR,GL_NOR,GL_XOR,GL_EQUIV,GL_AND_REVERSE,GL_AND_INVERTED,GL_OR_REVERSE, andGL_OR_INVERTED. The initial value isGL_COPY.- Throws
GL_INVALID_ENUMis generated if opcode is not an accepted value.GL_INVALID_OPERATIONis generated ifglLogicOpis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglMaterial
voidglMaterial(intface,intpname,float|int|array(float|int)param)- Description
glMaterialassigns values to material parameters. There are two matched sets of material parameters. One, the front-facing set, is used to shade points, lines, bitmaps, and all polygons (when two-sided lighting is disabled), or just front-facing polygons (when two-sided lighting is enabled). The other set, back-facing, is used to shade back-facing polygons only when two-sided lighting is enabled. Refer to theglLightModelreference page for details concerning one- and two-sided lighting calculations.glMaterialtakes three arguments. The first, face, specifies whether theGL_FRONTmaterials, theGL_BACKmaterials, or bothGL_FRONT_AND_BACKmaterials will be modified. The second, pname, specifies which of several parameters in one or both sets will be modified. The third, params, specifies what value or values will be assigned to the specified parameter.Material parameters are used in the lighting equation that is optionally applied to each vertex. The equation is discussed in the
glLightModelreference page. The parameters that can be specified usingglMaterial, and their interpretations by the lighting equation, are as follows:GL_AMBIENTparams contains four integer or floating-point values that specify the ambient RGBA reflectance of the material. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial ambient reflectance for both front- and back-facing materials is (0.2, 0.2, 0.2, 1.0). GL_DIFFUSEparams contains four integer or floating-point values that specify the diffuse RGBA reflectance of the material. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial diffuse reflectance for both front- and back-facing materials is (0.8, 0.8, 0.8, 1.0). GL_SPECULARparams contains four integer or floating-point values that specify the specular RGBA reflectance of the material. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial specular reflectance for both front- and back-facing materials is (0, 0, 0, 1). GL_EMISSIONparams contains four integer or floating-point values that specify the RGBA emitted light intensity of the material. Integer values are mapped linearly such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. Floating-point values are mapped directly. Neither integer nor floating-point values are clamped. The initial emission intensity for both front- and back-facing materials is (0, 0, 0, 1). GL_SHININESSparams is a single integer or floating-point value that specifies the RGBA specular exponent of the material. Integer and floating-point values are mapped directly. Only values in the range [0,128] are accepted. The initial specular exponent for both front- and back-facing materials is 0. GL_AMBIENT_AND_DIFFUSEEquivalent to calling glMaterialtwice with the same parameter values, once withGL_AMBIENTand once withGL_DIFFUSE.GL_COLOR_INDEXESparams contains three integer or floating-point values specifying the color indices for ambient, diffuse, and specular lighting. These three values, and GL_SHININESS, are the only material values used by the color index mode lighting equation. Refer to theglLightModelreference page for a discussion of color index lighting.- Parameter
face Specifies which face or faces are being updated. Must be one of
GL_FRONT,GL_BACK, orGL_FRONT_AND_BACK.- Parameter
pname Specifies the single-valued material parameter of the face or faces that is being updated. Must be
GL_SHININESS.- Parameter
param Specifies the value that parameter
GL_SHININESSwill be set to.- Parameter
face Specifies which face or faces are being updated. Must be one of
GL_FRONT,GL_BACK, orGL_FRONT_AND_BACK.- Parameter
pname Specifies the material parameter of the face or faces that is being updated. Must be one of
GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR,GL_EMISSION,GL_SHININESS,GL_AMBIENT_AND_DIFFUSE, orGL_COLOR_INDEXES.- Parameter
params Specifies a pointer to the value or values that pname will be set to.
- Throws
GL_INVALID_ENUMis generated if either face or pname is not an accepted value.GL_INVALID_VALUEis generated if a specular exponent outside the range [0,128] is specified.
- MethodglMatrixMode
voidglMatrixMode(intmode)- Description
glMatrixModesets the current matrix mode. mode can assume one of three values:GL_MODELVIEWApplies subsequent matrix operations to the modelview matrix stack. GL_PROJECTIONApplies subsequent matrix operations to the projection matrix stack. GL_TEXTUREApplies subsequent matrix operations to the texture matrix stack. To find out which matrix stack is currently the target of all matrix operations, call
glGetwith argumentGL_MATRIX_MODE. The initial value isGL_MODELVIEW.- Parameter
mode Specifies which matrix stack is the target for subsequent matrix operations. Three values are accepted:
GL_MODELVIEW,GL_PROJECTION, andGL_TEXTURE. The initial value isGL_MODELVIEW.- Throws
GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglMatrixModeis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglMultMatrix
voidglMultMatrix(array(array(float|int))m)- Description
glMultMatrixmultiplies the current matrix with the one specified using m, and replaces the current matrix with the product.The current matrix is determined by the current matrix mode (see
glMatrixMode). It is either the projection matrix, modelview matrix, or the texture matrix.- Parameter
m Points to 16 consecutive values that are used as the elements of a 4 times 4 column-major matrix.
- Throws
GL_INVALID_OPERATIONis generated ifglMultMatrixis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglNewList
voidglNewList(intlist,intmode)- Description
Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with
glNewList. All subsequent commands are placed in the display list, in the order issued, untilglEndListis called.glNewListhas two arguments. The first argument, list, is a positive integer that becomes the unique name for the display list. Names can be created and reserved withglGenListsand tested for uniqueness withglIsList. The second argument, mode, is a symbolic constant that can assume one of two values:GL_COMPILECommands are merely compiled. GL_COMPILE_AND_EXECUTECommands are executed as they are compiled into the display list. Certain commands are not compiled into the display list but are executed immediately, regardless of the display-list mode. These commands are
glColorPointer,glDeleteLists,glDisableClientState,glEdgeFlagPointer,glEnableClientState,glFeedbackBuffer,glFinish,glFlush,glGenLists,glIndexPointer,glInterleavedArrays,glIsEnabled,glIsList,glNormalPointer,glPopClientAttrib,glPixelStore,glPushClientAttrib,glReadPixels,glRenderMode,glSelectBuffer,glTexCoordPointer,glVertexPointer, and all of theglGetcommands.Similarly,
glTexImage2DandglTexImage1Dare executed immediately and not compiled into the display list when their first argument isGL_PROXY_TEXTURE_2DorGL_PROXY_TEXTURE_1D, respectively.When
glEndListis encountered, the display-list definition is completed by associating the list with the unique name list (specified in theglNewListcommand). If a display list with name list already exists, it is replaced only whenglEndListis called.- Parameter
list Specifies the display-list name.
- Parameter
mode Specifies the compilation mode, which can be
GL_COMPILEorGL_COMPILE_AND_EXECUTE.- Throws
GL_INVALID_VALUEis generated if list is 0.GL_INVALID_ENUMis generated if mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglEndListis called without a precedingglNewList, or ifglNewListis called while a display list is being defined.GL_INVALID_OPERATIONis generated ifglNewListorglEndListis executed between the execution ofglBeginand the corresponding execution ofglEnd.GL_OUT_OF_MEMORYis generated if there is insufficient memory to compile the display list. If the GL version is 1.1 or greater, no change is made to the previous contents of the display list, if any, and no other change is made to the GL state. (It is as if no attempt had been made to create the new display list.)
- MethodglNormal
voidglNormal(float|int|array(float|int)nx,float|int|voidny,float|int|voidnz)- Description
The current normal is set to the given coordinates whenever
glNormalis issued. Byte, short, or integer arguments are converted to floating-point format with a linear mapping that maps the most positive representable integer value to 1.0, and the most negative representable integer value to -1.0.Normals specified with
glNormalneed not have unit length. If normalization is enabled, then normals specified withglNormalare normalized after transformation. To enable and disable normalization, callglEnableandglDisablewith the argumentGL_NORMALIZE. Normalization is initially disabled.- Parameter
nx Specify the x, y, and z coordinates of the new current normal. The initial value of the current normal is the unit vector, (0, 0, 1).
- Parameter
v Specifies a pointer to an array of three elements: the x, y, and z coordinates of the new current normal.
- MethodglOrtho
voidglOrtho(floatleft,floatright,floatbottom,floattop,floatzNear,floatzFar)- Description
glOrthodescribes a transformation that produces a parallel projection. The current matrix (seeglMatrixMode) is multiplied by this matrix and the result replaces the current matrix, as ifglMultMatrixwere called with the following matrix as its argument: .sp .ce .EQ left ( matrix { ccol { {2 over {"right" - "left"}} above 0 above 0 above 0 } ccol { 0 above {2 over {"top" - "bottom"}} above 0 above 0 } ccol { 0 above 0 above {-2 over {"zFar" - "zNear"}} above 0 } ccol { {t sub x}~ above {t sub y}~ above {t sub z}~ above 1~ } } right ) .ENwhere .ce .EQ t sub x ~=~ -{{"right" + "left"} over {"right" - "left"}} .EN
.ce .EQ t sub y ~=~ -{{"top" + "bottom"} over {"top" - "bottom"}} .EN
.ce .EQ t sub z ~=~ -{{"zFar" + "zNear"} over {"zFar" - "zNear"}} .EN
.RE
Typically, the matrix mode is
GL_PROJECTION, and (left, bottom, -zNear) and (right, top, -zNear) specify the points on the near clipping plane that are mapped to the lower left and upper right corners of the window, respectively, assuming that the eye is located at (0, 0, 0). -zFar specifies the location of the far clipping plane. Both zNear and zFar can be either positive or negative.Use
glPushMatrixandglPopMatrixto save and restore the current matrix stack.- Parameter
left Specify the coordinates for the left and right vertical clipping planes.
- Parameter
bottom Specify the coordinates for the bottom and top horizontal clipping planes.
- Parameter
zNear Specify the distances to the nearer and farther depth clipping planes. These values are negative if the plane is to be behind the viewer.
- Throws
GL_INVALID_OPERATIONis generated ifglOrthois executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPassThrough
voidglPassThrough(floattoken)- Description
Feedback is a GL render mode. The mode is selected by calling
glRenderModewithGL_FEEDBACK. When the GL is in feedback mode, no pixels are produced by rasterization. Instead, information about primitives that would have been rasterized is fed back to the application using the GL. See theglFeedbackBufferreference page for a description of the feedback buffer and the values in it.glPassThroughinserts a user-defined marker in the feedback buffer when it is executed in feedback mode. token is returned as if it were a primitive; it is indicated with its own unique identifying value:GL_PASS_THROUGH_TOKEN. The order ofglPassThroughcommands with respect to the specification of graphics primitives is maintained.- Parameter
token Specifies a marker value to be placed in the feedback buffer following a
GL_PASS_THROUGH_TOKEN.- Throws
GL_INVALID_OPERATIONis generated ifglPassThroughis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPixelZoom
voidglPixelZoom(floatxfactor,floatyfactor)- Description
glPixelZoomspecifies values for the x and y zoom factors. During the execution ofglDrawPixelsorglCopyPixels, if (xr , yr ) is the current raster position, and a given element is in the mth row and nth column of the pixel rectangle, then pixels whose centers are in the rectangle with corners at .sp .ce (xr ~+~ n cdot "xfactor", yr ~+~ m cdot "yfactor") .sp .ce (xr ~+~ (n+1) cdot "xfactor", yr ~+~ (m+1) cdot "yfactor") .sp are candidates for replacement. Any pixel whose center lies on the bottom or left edge of this rectangular region is also modified.Pixel zoom factors are not limited to positive values. Negative zoom factors reflect the resulting image about the current raster position.
- Parameter
xfactor Specify the x and y zoom factors for pixel write operations.
- Throws
GL_INVALID_OPERATIONis generated ifglPixelZoomis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPointSize
voidglPointSize(floatsize)- Description
glPointSizespecifies the rasterized diameter of both aliased and antialiased points. Using a point size other than 1 has different effects, depending on whether point antialiasing is enabled. To enable and disable point antialiasing, callglEnableandglDisablewith argumentGL_POINT_SMOOTH. Point antialiasing is initially disabled.If point antialiasing is disabled, the actual size is determined by rounding the supplied size to the nearest integer. (If the rounding results in the value 0, it is as if the point size were 1.) If the rounded size is odd, then the center point ( x , y ) of the pixel fragment that represents the point is computed as .sp .ce ( \(lf ~ x sub w ~ \(rf ~+~ .5 , \(lf ~ y sub w ~ \(rf ~+~ .5 ) .sp where w subscripts indicate window coordinates. All pixels that lie within the square grid of the rounded size centered at ( x , y ) make up the fragment. If the size is even, the center point is .sp .ce ( \(lf ~ x sub w ~+~ .5 ~ \(rf, \(lf ~ y sub w ~+~ .5 ~ \(rf ) .sp and the rasterized fragment's centers are the half-integer window coordinates within the square of the rounded size centered at ( x , y ). All pixel fragments produced in rasterizing a nonantialiased point are assigned the same associated data, that of the vertex corresponding to the point.
If antialiasing is enabled, then point rasterization produces a fragment for each pixel square that intersects the region lying within the circle having diameter equal to the current point size and centered at the point's ( x sub w , y sub w ). The coverage value for each fragment is the window coordinate area of the intersection of the circular region with the corresponding pixel square. This value is saved and used in the final rasterization step. The data associated with each fragment is the data associated with the point being rasterized.
Not all sizes are supported when point antialiasing is enabled. If an unsupported size is requested, the nearest supported size is used. Only size 1 is guaranteed to be supported; others depend on the implementation. To query the range of supported sizes and the size difference between supported sizes within the range, call
glGetwith argumentsGL_POINT_SIZE_RANGEandGL_POINT_SIZE_GRANULARITY.- Parameter
size Specifies the diameter of rasterized points. The initial value is 1.
- Throws
GL_INVALID_VALUEis generated if size is less than or equal to 0.GL_INVALID_OPERATIONis generated ifglPointSizeis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPolygonMode
voidglPolygonMode(intface,intmode)- Description
glPolygonModecontrols the interpretation of polygons for rasterization. face describes which polygons mode applies to: front-facing polygons (GL_FRONT), back-facing polygons (GL_BACK), or both (GL_FRONT_AND_BACK). The polygon mode affects only the final rasterization of polygons. In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.Three modes are defined and can be specified in mode:
GL_POINTPolygon vertices that are marked as the start of a boundary edge are drawn as points. Point attributes such as GL_POINT_SIZEandGL_POINT_SMOOTHcontrol the rasterization of the points. Polygon rasterization attributes other thanGL_POLYGON_MODEhave no effect.GL_LINEBoundary edges of the polygon are drawn as line segments. They are treated as connected line segments for line stippling; the line stipple counter and pattern are not reset between segments (see glLineStipple). Line attributes such asGL_LINE_WIDTHandGL_LINE_SMOOTHcontrol the rasterization of the lines. Polygon rasterization attributes other thanGL_POLYGON_MODEhave no effect.GL_FILLThe interior of the polygon is filled. Polygon attributes such as GL_POLYGON_STIPPLEandGL_POLYGON_SMOOTHcontrol the rasterization of the polygon.- Parameter
face Specifies the polygons that mode applies to. Must be
GL_FRONTfor front-facing polygons,GL_BACKfor back-facing polygons, orGL_FRONT_AND_BACKfor front- and back-facing polygons.- Parameter
mode Specifies how polygons will be rasterized. Accepted values are
GL_POINT,GL_LINE, andGL_FILL. The initial value isGL_FILLfor both front- and back-facing polygons.- Throws
GL_INVALID_ENUMis generated if either face or mode is not an accepted value.GL_INVALID_OPERATIONis generated ifglPolygonModeis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPolygonOffset
voidglPolygonOffset(floatfactor,floatunits)- Description
When
GL_POLYGON_OFFSETis enabled, each fragment's depth value will be offset after it is interpolated from the depth values of the appropriate vertices. The value of the offset is "factor" ~*~ DZ ~~+~~ r ~*~ "units", where DZ~ is a measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into the depth buffer.glPolygonOffsetis useful for rendering hidden-line images, for applying decals to surfaces, and for rendering solids with highlighted edges.- Parameter
factor Specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
- Parameter
units Is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.
- Throws
GL_INVALID_OPERATIONis generated ifglPolygonOffsetis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPopAttrib
voidglPopAttrib()- Description
glPushAttribtakes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by ORing several of these constants together. The special maskGL_ALL_ATTRIB_BITScan be used to save all stackable states.The symbolic mask constants and their associated GL state are as follows (the second column lists which attributes are saved):
.TS ; l l .
GL_ACCUM_BUFFER_BITAccumulation buffer clear valueGL_COLOR_BUFFER_BITGL_ALPHA_TESTenable bit Alpha test function and reference valueGL_BLENDenable bit Blending source and destination functions Constant blend color Blending equationGL_DITHERenable bitGL_DRAW_BUFFERsettingGL_COLOR_LOGIC_OPenable bitGL_INDEX_LOGIC_OPenable bit Logic op function Color mode and index mode clear values Color mode and index mode writemasksGL_CURRENT_BITCurrent RGBA color Current color index Current normal vector Current texture coordinates Current raster positionGL_CURRENT_RASTER_POSITION_VALIDflag RGBA color associated with current raster position Color index associated with current raster position Texture coordinates associated with current raster positionGL_EDGE_FLAGflagGL_DEPTH_BUFFER_BITGL_DEPTH_TESTenable bit Depth buffer test function Depth buffer clear valueGL_DEPTH_WRITEMASKenable bitGL_ENABLE_BITGL_ALPHA_TESTflagGL_AUTO_NORMALflagGL_BLENDflag Enable bits for the user-definable clipping planesGL_COLOR_MATERIALGL_CULL_FACEflagGL_DEPTH_TESTflagGL_DITHERflagGL_FOGflagGL_LIGHTi where 0\ <= i<GL_MAX_LIGHTSGL_LIGHTINGflagGL_LINE_SMOOTHflagGL_LINE_STIPPLEflagGL_COLOR_LOGIC_OPflagGL_INDEX_LOGIC_OPflagGL_MAP1_x where x is a map typeGL_MAP2_x where x is a map typeGL_NORMALIZEflagGL_POINT_SMOOTHflagGL_POLYGON_OFFSET_LINEflagGL_POLYGON_OFFSET_FILLflagGL_POLYGON_OFFSET_POINTflagGL_POLYGON_SMOOTHflagGL_POLYGON_STIPPLEflagGL_SCISSOR_TESTflagGL_STENCIL_TESTflagGL_TEXTURE_1DflagGL_TEXTURE_2Dflag FlagsGL_TEXTURE_GEN_x where x is S, T, R, or QGL_EVAL_BITGL_MAP1_x enable bits, where x is a map typeGL_MAP2_x enable bits, where x is a map type 1D grid endpoints and divisions 2D grid endpoints and divisionsGL_AUTO_NORMALenable bitGL_FOG_BITGL_FOGenable bit Fog color Fog density Linear fog start Linear fog end Fog indexGL_FOG_MODEvalueGL_HINT_BITGL_PERSPECTIVE_CORRECTION_HINTsettingGL_POINT_SMOOTH_HINTsettingGL_LINE_SMOOTH_HINTsettingGL_POLYGON_SMOOTH_HINTsettingGL_FOG_HINTsettingGL_LIGHTING_BITGL_COLOR_MATERIALenable bitGL_COLOR_MATERIAL_FACEvalue Color material parameters that are tracking the current color Ambient scene colorGL_LIGHT_MODEL_LOCAL_VIEWERvalueGL_LIGHT_MODEL_TWO_SIDEsettingGL_LIGHTINGenable bit Enable bit for each light Ambient, diffuse, and specular intensity for each light Direction, position, exponent, and cutoff angle for each light Constant, linear, and quadratic attenuation factors for each light Ambient, diffuse, specular, and emissive color for each material Ambient, diffuse, and specular color indices for each material Specular exponent for each materialGL_SHADE_MODELsettingGL_LINE_BITGL_LINE_SMOOTHflagGL_LINE_STIPPLEenable bit Line stipple pattern and repeat counter Line widthGL_LIST_BITGL_LIST_BASEsettingGL_PIXEL_MODE_BITGL_RED_BIASandGL_RED_SCALEsettingsGL_GREEN_BIASandGL_GREEN_SCALEvaluesGL_BLUE_BIASandGL_BLUE_SCALEGL_ALPHA_BIASandGL_ALPHA_SCALEGL_DEPTH_BIASandGL_DEPTH_SCALEGL_INDEX_OFFSETandGL_INDEX_SHIFTvaluesGL_MAP_COLORandGL_MAP_STENCILflagsGL_ZOOM_XandGL_ZOOM_YfactorsGL_READ_BUFFERsettingGL_POINT_BITGL_POINT_SMOOTHflag Point sizeGL_POLYGON_BITGL_CULL_FACEenable bitGL_CULL_FACE_MODEvalueGL_FRONT_FACEindicatorGL_POLYGON_MODEsettingGL_POLYGON_SMOOTHflagGL_POLYGON_STIPPLEenable bitGL_POLYGON_OFFSET_FILLflagGL_POLYGON_OFFSET_LINEflagGL_POLYGON_OFFSET_POINTflagGL_POLYGON_OFFSET_FACTORGL_POLYGON_OFFSET_UNITSGL_POLYGON_STIPPLE_BITPolygon stipple imageGL_SCISSOR_BITGL_SCISSOR_TESTflag Scissor boxGL_STENCIL_BUFFER_BITGL_STENCIL_TESTenable bit Stencil function and reference value Stencil value mask Stencil fail, pass, and depth buffer pass actions Stencil buffer clear value Stencil buffer writemaskGL_TEXTURE_BITEnable bits for the four texture coordinates Border color for each texture image Minification function for each texture image Magnification function for each texture image Texture coordinates and wrap mode for each texture image Color and mode for each texture environment Enable bitsGL_TEXTURE_GEN_x, x is S, T, R, and QGL_TEXTURE_GEN_MODEsetting for S, T, R, and QglTexGenplane equations for S, T, R, and Q Current texture bindings (for example,GL_TEXTURE_2D_BINDING)GL_TRANSFORM_BITCoefficients of the six clipping planes Enable bits for the user-definable clipping planesGL_MATRIX_MODEvalueGL_NORMALIZEflagGL_VIEWPORT_BITDepth range (near and far) Viewport origin and extent .TEglPopAttribrestores the values of the state variables saved with the lastglPushAttribcommand. Those not saved are left unchanged.It is an error to push attributes onto a full stack, or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
Initially, the attribute stack is empty.
- Parameter
mask Specifies a mask that indicates which attributes to save. Values for mask are listed below.
- Throws
GL_STACK_OVERFLOWis generated ifglPushAttribis called while the attribute stack is full.GL_STACK_UNDERFLOWis generated ifglPopAttribis called while the attribute stack is empty.GL_INVALID_OPERATIONis generated ifglPushAttriborglPopAttribis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPopClientAttrib
voidglPopClientAttrib()- Description
glPushClientAttribtakes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by OR'ing several of these constants together. The special maskGL_CLIENT_ALL_ATTRIB_BITScan be used to save all stackable client state.The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved):
GL_CLIENT_PIXEL_STORE_BITPixel storage modesGL_CLIENT_VERTEX_ARRAY_BITVertex arrays (and enables)glPopClientAttribrestores the values of the client-state variables saved with the lastglPushClientAttrib. Those not saved are left unchanged.It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state.
Initially, the client attribute stack is empty.
- Parameter
mask Specifies a mask that indicates which attributes to save. Values for mask are listed below.
- Throws
GL_STACK_OVERFLOWis generated ifglPushClientAttribis called while the attribute stack is full.GL_STACK_UNDERFLOWis generated ifglPopClientAttribis called while the attribute stack is empty.
- MethodglPopMatrix
voidglPopMatrix()- Description
There is a stack of matrices for each of the matrix modes. In
GL_MODELVIEWmode, the stack depth is at least 32. In the other two modes,GL_PROJECTIONandGL_TEXTURE, the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.glPushMatrixpushes the current matrix stack down by one, duplicating the current matrix. That is, after aglPushMatrixcall, the matrix on top of the stack is identical to the one below it.glPopMatrixpops the current matrix stack, replacing the current matrix with the one below it on the stack.Initially, each of the stacks contains one matrix, an identity matrix.
It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix. In either case, the error flag is set and no other change is made to GL state.
- Throws
GL_STACK_OVERFLOWis generated ifglPushMatrixis called while the current matrix stack is full.GL_STACK_UNDERFLOWis generated ifglPopMatrixis called while the current matrix stack contains only a single matrix.GL_INVALID_OPERATIONis generated ifglPushMatrixorglPopMatrixis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPopName
voidglPopName()- Description
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.
glPushNamecauses name to be pushed onto the name stack.glPopNamepops one name off the top of the stack.The maximum name stack depth is implementation-dependent; call
GL_MAX_NAME_STACK_DEPTHto find out the value for a particular implementation. It is an error to push a name onto a full stack, or to pop a name off an empty stack. It is also an error to manipulate the name stack between the execution ofglBeginand the corresponding execution ofglEnd. In any of these cases, the error flag is set and no other change is made to GL state.The name stack is always empty while the render mode is not
GL_SELECT. Calls toglPushNameorglPopNamewhile the render mode is notGL_SELECTare ignored.- Parameter
name Specifies a name that will be pushed onto the name stack.
- Throws
GL_STACK_OVERFLOWis generated ifglPushNameis called while the name stack is full.GL_STACK_UNDERFLOWis generated ifglPopNameis called while the name stack is empty.GL_INVALID_OPERATIONis generated ifglPushNameorglPopNameis executed between a call toglBeginand the corresponding call toglEnd.
- MethodglPushAttrib
voidglPushAttrib(intmask)- Description
glPushAttribtakes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by ORing several of these constants together. The special maskGL_ALL_ATTRIB_BITScan be used to save all stackable states.The symbolic mask constants and their associated GL state are as follows (the second column lists which attributes are saved):
.TS ; l l .
GL_ACCUM_BUFFER_BITAccumulation buffer clear valueGL_COLOR_BUFFER_BITGL_ALPHA_TESTenable bit Alpha test function and reference valueGL_BLENDenable bit Blending source and destination functions Constant blend color Blending equationGL_DITHERenable bitGL_DRAW_BUFFERsettingGL_COLOR_LOGIC_OPenable bitGL_INDEX_LOGIC_OPenable bit Logic op function Color mode and index mode clear values Color mode and index mode writemasksGL_CURRENT_BITCurrent RGBA color Current color index Current normal vector Current texture coordinates Current raster positionGL_CURRENT_RASTER_POSITION_VALIDflag RGBA color associated with current raster position Color index associated with current raster position Texture coordinates associated with current raster positionGL_EDGE_FLAGflagGL_DEPTH_BUFFER_BITGL_DEPTH_TESTenable bit Depth buffer test function Depth buffer clear valueGL_DEPTH_WRITEMASKenable bitGL_ENABLE_BITGL_ALPHA_TESTflagGL_AUTO_NORMALflagGL_BLENDflag Enable bits for the user-definable clipping planesGL_COLOR_MATERIALGL_CULL_FACEflagGL_DEPTH_TESTflagGL_DITHERflagGL_FOGflagGL_LIGHTi where 0\ <= i<GL_MAX_LIGHTSGL_LIGHTINGflagGL_LINE_SMOOTHflagGL_LINE_STIPPLEflagGL_COLOR_LOGIC_OPflagGL_INDEX_LOGIC_OPflagGL_MAP1_x where x is a map typeGL_MAP2_x where x is a map typeGL_NORMALIZEflagGL_POINT_SMOOTHflagGL_POLYGON_OFFSET_LINEflagGL_POLYGON_OFFSET_FILLflagGL_POLYGON_OFFSET_POINTflagGL_POLYGON_SMOOTHflagGL_POLYGON_STIPPLEflagGL_SCISSOR_TESTflagGL_STENCIL_TESTflagGL_TEXTURE_1DflagGL_TEXTURE_2Dflag FlagsGL_TEXTURE_GEN_x where x is S, T, R, or QGL_EVAL_BITGL_MAP1_x enable bits, where x is a map typeGL_MAP2_x enable bits, where x is a map type 1D grid endpoints and divisions 2D grid endpoints and divisionsGL_AUTO_NORMALenable bitGL_FOG_BITGL_FOGenable bit Fog color Fog density Linear fog start Linear fog end Fog indexGL_FOG_MODEvalueGL_HINT_BITGL_PERSPECTIVE_CORRECTION_HINTsettingGL_POINT_SMOOTH_HINTsettingGL_LINE_SMOOTH_HINTsettingGL_POLYGON_SMOOTH_HINTsettingGL_FOG_HINTsettingGL_LIGHTING_BITGL_COLOR_MATERIALenable bitGL_COLOR_MATERIAL_FACEvalue Color material parameters that are tracking the current color Ambient scene colorGL_LIGHT_MODEL_LOCAL_VIEWERvalueGL_LIGHT_MODEL_TWO_SIDEsettingGL_LIGHTINGenable bit Enable bit for each light Ambient, diffuse, and specular intensity for each light Direction, position, exponent, and cutoff angle for each light Constant, linear, and quadratic attenuation factors for each light Ambient, diffuse, specular, and emissive color for each material Ambient, diffuse, and specular color indices for each material Specular exponent for each materialGL_SHADE_MODELsettingGL_LINE_BITGL_LINE_SMOOTHflagGL_LINE_STIPPLEenable bit Line stipple pattern and repeat counter Line widthGL_LIST_BITGL_LIST_BASEsettingGL_PIXEL_MODE_BITGL_RED_BIASandGL_RED_SCALEsettingsGL_GREEN_BIASandGL_GREEN_SCALEvaluesGL_BLUE_BIASandGL_BLUE_SCALEGL_ALPHA_BIASandGL_ALPHA_SCALEGL_DEPTH_BIASandGL_DEPTH_SCALEGL_INDEX_OFFSETandGL_INDEX_SHIFTvaluesGL_MAP_COLORandGL_MAP_STENCILflagsGL_ZOOM_XandGL_ZOOM_YfactorsGL_READ_BUFFERsettingGL_POINT_BITGL_POINT_SMOOTHflag Point sizeGL_POLYGON_BITGL_CULL_FACEenable bitGL_CULL_FACE_MODEvalueGL_FRONT_FACEindicatorGL_POLYGON_MODEsettingGL_POLYGON_SMOOTHflagGL_POLYGON_STIPPLEenable bitGL_POLYGON_OFFSET_FILLflagGL_POLYGON_OFFSET_LINEflagGL_POLYGON_OFFSET_POINTflagGL_POLYGON_OFFSET_FACTORGL_POLYGON_OFFSET_UNITSGL_POLYGON_STIPPLE_BITPolygon stipple imageGL_SCISSOR_BITGL_SCISSOR_TESTflag Scissor boxGL_STENCIL_BUFFER_BITGL_STENCIL_TESTenable bit Stencil function and reference value Stencil value mask Stencil fail, pass, and depth buffer pass actions Stencil buffer clear value Stencil buffer writemaskGL_TEXTURE_BITEnable bits for the four texture coordinates Border color for each texture image Minification function for each texture image Magnification function for each texture image Texture coordinates and wrap mode for each texture image Color and mode for each texture environment Enable bitsGL_TEXTURE_GEN_x, x is S, T, R, and QGL_TEXTURE_GEN_MODEsetting for S, T, R, and QglTexGenplane equations for S, T, R, and Q Current texture bindings (for example,GL_TEXTURE_2D_BINDING)GL_TRANSFORM_BITCoefficients of the six clipping planes Enable bits for the user-definable clipping planesGL_MATRIX_MODEvalueGL_NORMALIZEflagGL_VIEWPORT_BITDepth range (near and far) Viewport origin and extent .TEglPopAttribrestores the values of the state variables saved with the lastglPushAttribcommand. Those not saved are left unchanged.It is an error to push attributes onto a full stack, or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
Initially, the attribute stack is empty.
- Parameter
mask Specifies a mask that indicates which attributes to save. Values for mask are listed below.
- Throws
GL_STACK_OVERFLOWis generated ifglPushAttribis called while the attribute stack is full.GL_STACK_UNDERFLOWis generated ifglPopAttribis called while the attribute stack is empty.GL_INVALID_OPERATIONis generated ifglPushAttriborglPopAttribis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPushClientAttrib
voidglPushClientAttrib(intmask)- Description
glPushClientAttribtakes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by OR'ing several of these constants together. The special maskGL_CLIENT_ALL_ATTRIB_BITScan be used to save all stackable client state.The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved):
GL_CLIENT_PIXEL_STORE_BITPixel storage modesGL_CLIENT_VERTEX_ARRAY_BITVertex arrays (and enables)glPopClientAttribrestores the values of the client-state variables saved with the lastglPushClientAttrib. Those not saved are left unchanged.It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state.
Initially, the client attribute stack is empty.
- Parameter
mask Specifies a mask that indicates which attributes to save. Values for mask are listed below.
- Throws
GL_STACK_OVERFLOWis generated ifglPushClientAttribis called while the attribute stack is full.GL_STACK_UNDERFLOWis generated ifglPopClientAttribis called while the attribute stack is empty.
- MethodglPushMatrix
voidglPushMatrix()- Description
There is a stack of matrices for each of the matrix modes. In
GL_MODELVIEWmode, the stack depth is at least 32. In the other two modes,GL_PROJECTIONandGL_TEXTURE, the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.glPushMatrixpushes the current matrix stack down by one, duplicating the current matrix. That is, after aglPushMatrixcall, the matrix on top of the stack is identical to the one below it.glPopMatrixpops the current matrix stack, replacing the current matrix with the one below it on the stack.Initially, each of the stacks contains one matrix, an identity matrix.
It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix. In either case, the error flag is set and no other change is made to GL state.
- Throws
GL_STACK_OVERFLOWis generated ifglPushMatrixis called while the current matrix stack is full.GL_STACK_UNDERFLOWis generated ifglPopMatrixis called while the current matrix stack contains only a single matrix.GL_INVALID_OPERATIONis generated ifglPushMatrixorglPopMatrixis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglPushName
voidglPushName(intname)- Description
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.
glPushNamecauses name to be pushed onto the name stack.glPopNamepops one name off the top of the stack.The maximum name stack depth is implementation-dependent; call
GL_MAX_NAME_STACK_DEPTHto find out the value for a particular implementation. It is an error to push a name onto a full stack, or to pop a name off an empty stack. It is also an error to manipulate the name stack between the execution ofglBeginand the corresponding execution ofglEnd. In any of these cases, the error flag is set and no other change is made to GL state.The name stack is always empty while the render mode is not
GL_SELECT. Calls toglPushNameorglPopNamewhile the render mode is notGL_SELECTare ignored.- Parameter
name Specifies a name that will be pushed onto the name stack.
- Throws
GL_STACK_OVERFLOWis generated ifglPushNameis called while the name stack is full.GL_STACK_UNDERFLOWis generated ifglPopNameis called while the name stack is empty.GL_INVALID_OPERATIONis generated ifglPushNameorglPopNameis executed between a call toglBeginand the corresponding call toglEnd.
- MethodglRasterPos
voidglRasterPos(float|intx,float|inty,float|int|voidz,float|int|voidw)voidglRasterPos(array(float|int)pos)- Description
The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See
glBitmap,glDrawPixels, andglCopyPixels.The current raster position consists of three window coordinates (x, y, z), a clip coordinate value (w), an eye coordinate distance, a valid bit, and associated color data and texture coordinates. The w coordinate is a clip coordinate, because w is not projected to window coordinates. The variable z defaults to 0 and w defaults to 1.
The object coordinates presented by
glRasterPosare treated just like those of aglVertexcommand: They are transformed by the current modelview and projection matrices and passed to the clipping stage. If the vertex is not culled, then it is projected and scaled to window coordinates, which become the new current raster position, and theGL_CURRENT_RASTER_POSITION_VALIDflag is set. If the vertex .I is culled, then the valid bit is cleared and the current raster position and associated color and texture coordinates are undefined.The current raster position also includes some associated color data and texture coordinates. If lighting is enabled, then
GL_CURRENT_RASTER_COLOR(in RGBA mode) orGL_CURRENT_RASTER_INDEX(in color index mode) is set to the color produced by the lighting calculation (seeglLight,glLightModel, andglShadeModel). If lighting is disabled, current color (in RGBA mode, state variableGL_CURRENT_COLOR) or color index (in color index mode, state variableGL_CURRENT_INDEX) is used to update the current raster color.Likewise,
GL_CURRENT_RASTER_TEXTURE_COORDSis updated as a function ofGL_CURRENT_TEXTURE_COORDS, based on the texture matrix and the texture generation functions (seeglTexGen). Finally, the distance from the origin of the eye coordinate system to the vertex as transformed by only the modelview matrix replacesGL_CURRENT_RASTER_DISTANCE.Initially, the current raster position is (0, 0, 0, 1), the current raster distance is 0, the valid bit is set, the associated RGBA color is (1, 1, 1, 1), the associated color index is 1, and the associated texture coordinates are (0, 0, 0, 1). In RGBA mode,
GL_CURRENT_RASTER_INDEXis always 1; in color index mode, the current raster RGBA color always maintains its initial value.- Parameter
x Specify the x, y, z, and w object coordinates (if present) for the raster position.
- Parameter
v Specifies a pointer to an array of two, three, or four elements, specifying x, y, z, and w coordinates, respectively.
- Throws
GL_INVALID_OPERATIONis generated ifglRasterPosis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglReadBuffer
voidglReadBuffer(intmode)- Description
glReadBufferspecifies a color buffer as the source for subsequentglReadPixels,glCopyTexImage1D,glCopyTexImage2D,glCopyTexSubImage1D,glCopyTexSubImage2D, andglCopyPixelscommands. mode accepts one of twelve or more predefined values. (GL_AUX0throughGL_AUX3are always defined.) In a fully configured system,GL_FRONT,GL_LEFT, andGL_FRONT_LEFTall name the front left buffer,GL_FRONT_RIGHTandGL_RIGHTname the front right buffer, andGL_BACK_LEFTandGL_BACKname the back left buffer.Nonstereo double-buffered configurations have only a front left and a back left buffer. Single-buffered configurations have a front left and a front right buffer if stereo, and only a front left buffer if nonstereo. It is an error to specify a nonexistent buffer to
glReadBuffer.mode is initially
GL_FRONTin single-buffered configurations, andGL_BACKin double-buffered configurations.- Parameter
mode Specifies a color buffer. Accepted values are
GL_FRONT_LEFT,GL_FRONT_RIGHT,GL_BACK_LEFT,GL_BACK_RIGHT,GL_FRONT,GL_BACK,GL_LEFT,GL_RIGHT, and GL_AUXi, where i is between 0 andGL_AUX_BUFFERS-1.- Throws
GL_INVALID_ENUMis generated if mode is not one of the twelve (or more) accepted values.GL_INVALID_OPERATIONis generated if mode specifies a buffer that does not exist.GL_INVALID_OPERATIONis generated ifglReadBufferis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglRenderMode
voidglRenderMode(intmode)- Description
glRenderModesets the rasterization mode. It takes one argument, mode, which can assume one of three predefined values:GL_RENDERRender mode. Primitives are rasterized, producing pixel fragments, which are written into the frame buffer. This is the normal mode and also the default mode. GL_SELECTSelection mode. No pixel fragments are produced, and no change to the frame buffer contents is made. Instead, a record of the names of primitives that would have been drawn if the render mode had been GL_RENDERis returned in a select buffer, which must be created (seeglSelectBuffer) before selection mode is entered.GL_FEEDBACKFeedback mode. No pixel fragments are produced, and no change to the frame buffer contents is made. Instead, the coordinates and attributes of vertices that would have been drawn if the render mode had been GL_RENDERis returned in a feedback buffer, which must be created (seeglFeedbackBuffer) before feedback mode is entered.The return value of
glRenderModeis determined by the render mode at the timeglRenderModeis called, rather than by mode. The values returned for the three render modes are as follows:GL_RENDER0. GL_SELECTThe number of hit records transferred to the select buffer. GL_FEEDBACKThe number of values (not vertices) transferred to the feedback buffer. See the
glSelectBufferandglFeedbackBufferreference pages for more details concerning selection and feedback operation.- Parameter
mode Specifies the rasterization mode. Three values are accepted:
GL_RENDER,GL_SELECT, andGL_FEEDBACK. The initial value isGL_RENDER.- Throws
GL_INVALID_ENUMis generated if mode is not one of the three accepted values.GL_INVALID_OPERATIONis generated ifglSelectBufferis called while the render mode isGL_SELECT, or ifglRenderModeis called with argumentGL_SELECTbeforeglSelectBufferis called at least once.GL_INVALID_OPERATIONis generated ifglFeedbackBufferis called while the render mode isGL_FEEDBACK, or ifglRenderModeis called with argumentGL_FEEDBACKbeforeglFeedbackBufferis called at least once.GL_INVALID_OPERATIONis generated ifglRenderModeis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglRotate
voidglRotate(float|int|array(float|int)angle,float|int|voidx,float|int|voidy,float|int|voidz)- Description
glRotateproduces a rotation of angle degrees around the vector ("x", "y", "z"). The current matrix (seeglMatrixMode) is multiplied by a rotation matrix with the product replacing the current matrix, as ifglMultMatrixwere called with the following matrix as its argument:.ce .EQ left ( ~ down 20 matrix { ccol { "x" "x" (1 - c)+ c above "y" "x" (1 - c)+ "z" s above "x" "z" (1 - c)-"y" s above ~0 } ccol {"x" "y" (1 - c)-"z" s above "y" "y" (1 - c)+ c above "y" "z" (1 - c)+ "x" s above ~0 } ccol { "x" "z" (1 - c)+ "y" s above "y" "z" (1 - c)- "x" s above "z" "z" (1 - c) + c above ~0 } ccol { ~0 above ~0 above ~0 above ~1} } ~~ right ) .EN
.sp Where c ~=~ cos("angle"), s ~=~ sine("angle"), and ||(~"x", "y", "z"~)|| ~=~ 1 (if not, the GL will normalize this vector). .sp .sp
If the matrix mode is either
GL_MODELVIEWorGL_PROJECTION, all objects drawn afterglRotateis called are rotated. UseglPushMatrixandglPopMatrixto save and restore the unrotated coordinate system.- Parameter
angle Specifies the angle of rotation, in degrees.
- Parameter
x Specify the x, y, and z coordinates of a vector, respectively.
- Throws
GL_INVALID_OPERATIONis generated ifglRotateis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglScale
voidglScale(float|int|array(float|int)x,float|int|voidy,float|int|voidz)- Description
glScaleproduces a nonuniform scaling along the x, y, and z axes. The three parameters indicate the desired scale factor along each of the three axes.The current matrix (see
glMatrixMode) is multiplied by this scale matrix, and the product replaces the current matrix as ifglScalewere called with the following matrix as its argument:.ce .EQ left ( ~ down 20 matrix { ccol { ~"x" above ~0 above ~0 above ~0 } ccol { ~0 above ~"y" above ~0 above ~0 } ccol { ~0 above ~0 above ~"z" above ~0 } ccol { ~0 above ~0 above ~0 above ~1} } ~~ right ) .EN .sp If the matrix mode is either
GL_MODELVIEWorGL_PROJECTION, all objects drawn afterglScaleis called are scaled.Use
glPushMatrixandglPopMatrixto save and restore the unscaled coordinate system.- Parameter
x Specify scale factors along the x, y, and z axes, respectively.
- Throws
GL_INVALID_OPERATIONis generated ifglScaleis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglScissor
voidglScissor(intx,inty,intwidth,intheight)- Description
glScissordefines a rectangle, called the scissor box, in window coordinates. The first two arguments, x and y, specify the lower left corner of the box. width and height specify the width and height of the box.To enable and disable the scissor test, call
glEnableandglDisablewith argumentGL_SCISSOR_TEST. The test is initially disabled. While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window coordinates have integer values at the shared corners of frame buffer pixels. \f7glScissor(0,0,1,1)\fP allows modification of only the lower left pixel in the window, and \f7glScissor(0,0,0,0)\fP doesn't allow modification of any pixels in the window.When the scissor test is disabled, it is as though the scissor box includes the entire window.
- Parameter
x Specify the lower left corner of the scissor box. Initially (0, 0).
- Parameter
width Specify the width and height of the scissor box. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
- Throws
GL_INVALID_VALUEis generated if either width or height is negative.GL_INVALID_OPERATIONis generated ifglScissoris executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglShadeModel
voidglShadeModel(intmode)- Description
GL primitives can have either flat or smooth shading. Smooth shading, the default, causes the computed colors of vertices to be interpolated as the primitive is rasterized, typically assigning different colors to each resulting pixel fragment. Flat shading selects the computed color of just one vertex and assigns it to all the pixel fragments generated by rasterizing a single primitive. In either case, the computed color of a vertex is the result of lighting if lighting is enabled, or it is the current color at the time the vertex was specified if lighting is disabled.
Flat and smooth shading are indistinguishable for points. Starting when
glBeginis issued and counting vertices and primitives from 1, the GL gives each flat-shaded line segment i the computed color of vertex i + 1, its second vertex. Counting similarly from 1, the GL gives each flat-shaded polygon the computed color of the vertex listed in the following table. This is the last vertex to specify the polygon in all cases except single polygons, where the first vertex specifies the flat-shaded color. .sp .TS center box; l | c . primitive type of polygon i vertex = Single polygon ( i == 1 ) 1 Triangle strip i + 2 Triangle fan i + 2 Independent triangle 3 i Quad strip 2 i + 2 Independent quad 4 i .TE .sp Flat and smooth shading are specified byglShadeModelwith mode set toGL_FLATandGL_SMOOTH, respectively.- Parameter
mode Specifies a symbolic value representing a shading technique. Accepted values are
GL_FLATandGL_SMOOTH. The initial value isGL_SMOOTH.- Throws
GL_INVALID_ENUMis generated if mode is any value other thanGL_FLATorGL_SMOOTH.GL_INVALID_OPERATIONis generated ifglShadeModelis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglStencilFunc
voidglStencilFunc(intfunc,intref,intmask)- Description
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.
The stencil test conditionally eliminates a pixel based on the outcome of a comparison between the reference value and the value in the stencil buffer. To enable and disable the test, call
glEnableandglDisablewith argumentGL_STENCIL_TEST. To specify actions based on the outcome of the stencil test, callglStencilOp.func is a symbolic constant that determines the stencil comparison function. It accepts one of eight values, shown in the following list. ref is an integer reference value that is used in the stencil comparison. It is clamped to the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer. mask is bitwise ANDed with both the reference value and the stored stencil value, with the ANDed values participating in the comparison. .P If stencil represents the value stored in the corresponding stencil buffer location, the following list shows the effect of each comparison function that can be specified by func. Only if the comparison succeeds is the pixel passed through to the next stage in the rasterization process (see
glStencilOp). All tests treat stencil values as unsigned integers in the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer.The following values are accepted by func:
GL_NEVERAlways fails. GL_LESSPasses if ( ref & mask ) < ( stencil & mask ). GL_LEQUALPasses if ( ref & mask ) \(<= ( stencil & mask ). GL_GREATERPasses if ( ref & mask ) > ( stencil & mask ). GL_GEQUALPasses if ( ref & mask ) \(>= ( stencil & mask ). GL_EQUALPasses if ( ref & mask ) = ( stencil & mask ). GL_NOTEQUALPasses if ( ref & mask ) \(!= ( stencil & mask ). GL_ALWAYSAlways passes. - Parameter
func Specifies the test function. Eight tokens are valid:
GL_NEVER,GL_LESS,GL_LEQUAL,GL_GREATER,GL_GEQUAL,GL_EQUAL,GL_NOTEQUAL, andGL_ALWAYS. The initial value isGL_ALWAYS.- Parameter
ref Specifies the reference value for the stencil test. ref is clamped to the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer. The initial value is 0.
- Parameter
mask Specifies a mask that is ANDed with both the reference value and the stored stencil value when the test is done. The initial value is all 1's.
- Throws
GL_INVALID_ENUMis generated if func is not one of the eight accepted values.GL_INVALID_OPERATIONis generated ifglStencilFuncis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglStencilMask
voidglStencilMask(intmask)- Description
glStencilMaskcontrols the writing of individual bits in the stencil planes. The least significant n bits of mask, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.- Parameter
mask Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.
- Throws
GL_INVALID_OPERATIONis generated ifglStencilMaskis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglStencilOp
voidglStencilOp(intfail,intzfail,intzpass)- Description
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.
The stencil test conditionally eliminates a pixel based on the outcome of a comparison between the value in the stencil buffer and a reference value. To enable and disable the test, call
glEnableandglDisablewith argumentGL_STENCIL_TEST; to control it, callglStencilFunc.glStencilOptakes three arguments that indicate what happens to the stored stencil value while stenciling is enabled. If the stencil test fails, no change is made to the pixel's color or depth buffers, and fail specifies what happens to the stencil buffer contents. The following six actions are possible.GL_KEEPKeeps the current value. GL_ZEROSets the stencil buffer value to 0. GL_REPLACESets the stencil buffer value to ref, as specified by glStencilFunc.GL_INCRIncrements the current stencil buffer value. Clamps to the maximum representable unsigned value. GL_DECRDecrements the current stencil buffer value. Clamps to 0. GL_INVERTBitwise inverts the current stencil buffer value. Stencil buffer values are treated as unsigned integers. When incremented and decremented, values are clamped to 0 and 2 sup n - 1, where n is the value returned by querying
GL_STENCIL_BITS.The other two arguments to
glStencilOpspecify stencil buffer actions that depend on whether subsequent depth buffer tests succeed (zpass) or fail (zfail) (seeglDepthFunc). The actions are specified using the same six symbolic constants as fail. Note that zfail is ignored when there is no depth buffer, or when the depth buffer is not enabled. In these cases, fail and zpass specify stencil action when the stencil test fails and passes, respectively.- Parameter
fail Specifies the action to take when the stencil test fails. Six symbolic constants are accepted:
GL_KEEP,GL_ZERO,GL_REPLACE,GL_INCR,GL_DECR, andGL_INVERT. The initial value isGL_KEEP.- Parameter
zfail Specifies the stencil action when the stencil test passes, but the depth test fails. zfail accepts the same symbolic constants as fail. The initial value is
GL_KEEP.- Parameter
zpass Specifies the stencil action when both the stencil test and the depth test pass, or when the stencil test passes and either there is no depth buffer or depth testing is not enabled. zpass accepts the same symbolic constants as fail. The initial value is
GL_KEEP.- Throws
GL_INVALID_ENUMis generated if fail, zfail, or zpass is any value other than the six defined constant values.GL_INVALID_OPERATIONis generated ifglStencilOpis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTexCoord
voidglTexCoord(float|int|array(float|int)s,float|int|voidt,float|int|voidr,float|int|voidq)- Description
glTexCoordspecifies texture coordinates in one, two, three, or four dimensions.glTexCoord1sets the current texture coordinates to (s, 0, 0, 1); a call toglTexCoord2sets them to (s, t, 0, 1). Similarly,glTexCoord3specifies the texture coordinates as (s, t, r, 1), andglTexCoord4defines all four components explicitly as (s, t, r, q).The current texture coordinates are part of the data that is associated with each vertex and with the current raster position. Initially, the values for s, t, r, and q are (0, 0, 0, 1).
- Parameter
s Specify s, t, r, and q texture coordinates. Not all parameters are present in all forms of the command.
- Parameter
v Specifies a pointer to an array of one, two, three, or four elements, which in turn specify the s, t, r, and q texture coordinates.
- MethodglTexEnv
voidglTexEnv(inttarget,intpname,float|int|array(float|int)param)- Description
A texture environment specifies how texture values are interpreted when a fragment is textured. target must be
GL_TEXTURE_ENV. pname can be eitherGL_TEXTURE_ENV_MODEorGL_TEXTURE_ENV_COLOR.If pname is
GL_TEXTURE_ENV_MODE, then params is (or points to) the symbolic name of a texture function. Four texture functions may be specified:GL_MODULATE,GL_DECAL,GL_BLEND, andGL_REPLACE.A texture function acts on the fragment to be textured using the texture image value that applies to the fragment (see
glTexParameter) and produces an RGBA color for that fragment. The following table shows how the RGBA color is produced for each of the three texture functions that can be chosen. C is a triple of color values (RGB) and A is the associated alpha value. RGBA values extracted from a texture image are in the range [0,1]. The subscript f refers to the incoming fragment, the subscript t to the texture image, the subscript c to the texture environment color, and subscript v indicates a value produced by the texture function.A texture image can have up to four components per texture element (see
glTexImage1D,glTexImage2D,glCopyTexImage1D, andglCopyTexImage2D). In a one-component image, L sub t indicates that single component. A two-component image uses L sub t and A sub t. A three-component image has only a color value, C sub t. A four-component image has both a color value C sub t and an alpha value A sub t..ne .TS center box tab(:) ; ci || ci s s s ci || c c c c c || c | c | c | c. Base internal:Texture functions format:
GL_MODULATE:GL_DECAL:GL_BLEND:GL_REPLACE=GL_ALPHA:C sub v = C sub f:undefined:C sub v = C sub f:C sub v = C sub f \^ :A sub v = A sub f A sub t:\^:A sub v = A sub f:A sub v = A sub t _GL_LUMINANCE:C sub v = L sub t C sub f:undefined:C sub v = ( 1 - L sub t ) C sub f:C sub v = L sub t 1: : :+ L sub t C sub c: : : : : : A sub v = A sub f:\^: A sub v = A sub f:A sub v = A sub f _GL_LUMINANCE:C sub v = L sub t C sub f:undefined:C sub v = ( 1 - L sub t ) C sub f :C sub v = L sub t \_ALPHA: : : + L sub t C sub c 2: : : : :A sub v = A sub t A sub f:\^:A sub v = A sub t A sub f:A sub v = A sub t _GL_INTENSITY:C sub v = C sub f I sub t:undefined:C sub v = ( 1 - I sub t ) C sub f :C sub v = I sub t : : :+ I sub t C sub c : : : : \^ :A sub v = A sub f I sub t:\^:A sub v = ( 1 - I sub t ) A sub f :A sub v = I sub t : : :+ I sub t A sub c: _GL_RGB:C sub v = C sub t C sub f:C sub v = C sub t:C sub v = (1 - C sub t) C sub f :C sub v = C sub t 3: : : + C sub t C sub c : : : : :A sub v = A sub f:A sub v = A sub f:A sub v = A sub f:A sub v = A sub f _GL_RGBA:C sub v = C sub t C sub f:C sub v = ( 1 - A sub t ) C sub f :C sub v = (1 - C sub t) C sub f :C sub v = C sub t 4: :+ A sub t C sub t: + C sub t C sub c : : : : :A sub v = A sub t A sub f:A sub v = A sub f:A sub v = A sub t A sub f:A sub v = A sub t .TE .sp If pname isGL_TEXTURE_ENV_COLOR, params is a pointer to an array that holds an RGBA color consisting of four values. Integer color components are interpreted linearly such that the most positive integer maps to 1.0, and the most negative integer maps to -1.0. The values are clamped to the range [0,1] when they are specified. C sub c takes these four values.GL_TEXTURE_ENV_MODEdefaults toGL_MODULATEandGL_TEXTURE_ENV_COLORdefaults to (0, 0, 0, 0).- Parameter
target Specifies a texture environment. Must be
GL_TEXTURE_ENV.- Parameter
pname Specifies the symbolic name of a single-valued texture environment parameter. Must be
GL_TEXTURE_ENV_MODE.- Parameter
param Specifies a single symbolic constant, one of
GL_MODULATE,GL_DECAL,GL_BLEND, orGL_REPLACE.- Parameter
target Specifies a texture environment. Must be
GL_TEXTURE_ENV.- Parameter
pname Specifies the symbolic name of a texture environment parameter. Accepted values are
GL_TEXTURE_ENV_MODEandGL_TEXTURE_ENV_COLOR.- Parameter
params Specifies a pointer to a parameter array that contains either a single symbolic constant or an RGBA color.
- Throws
GL_INVALID_ENUMis generated when target or pname is not one of the accepted defined values, or when params should have a defined constant value (based on the value of pname) and does not.GL_INVALID_OPERATIONis generated ifglTexEnvis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTexGen
voidglTexGen(intcoord,intpname,float|int|array(float|int)param)- Description
glTexGenselects a texture-coordinate generation function or supplies coefficients for one of the functions. coord names one of the (s, t, r, q) texture coordinates; it must be one of the symbolsGL_S,GL_T,GL_R, orGL_Q. pname must be one of three symbolic constants:GL_TEXTURE_GEN_MODE,GL_OBJECT_PLANE, orGL_EYE_PLANE. If pname isGL_TEXTURE_GEN_MODE, then params chooses a mode, one ofGL_OBJECT_LINEAR,GL_EYE_LINEAR, orGL_SPHERE_MAP. If pname is eitherGL_OBJECT_PLANEorGL_EYE_PLANE, params contains coefficients for the corresponding texture generation function. .P If the texture generation function isGL_OBJECT_LINEAR, the function.ce g = p sub 1 x sub o + p sub 2 y sub o + p sub 3 z sub o + p sub 4 w sub o
is used, where g is the value computed for the coordinate named in coord, p sub 1, p sub 2, p sub 3, and p sub 4 are the four values supplied in params, and x sub o, y sub o, z sub o, and w sub o are the object coordinates of the vertex. This function can be used, for example, to texture-map terrain using sea level as a reference plane (defined by p sub 1, p sub 2, p sub 3, and p sub 4). The altitude of a terrain vertex is computed by the
GL_OBJECT_LINEARcoordinate generation function as its distance from sea level; that altitude can then be used to index the texture image to map white snow onto peaks and green grass onto foothills.If the texture generation function is
GL_EYE_LINEAR, the function.ce g = {p sub 1} sup prime ~x sub e + {p sub 2} sup prime ~y sub e + {p sub 3} sup prime ~z sub e + {p sub 4} sup prime ~w sub e
is used, where
.ce $( {p sub 1} sup prime ~~{p sub 2} sup prime~~{p sub 3} sup prime~~ {{p sub 4}sup prime}) = ( p sub 1~~ p sub 2~~ p sub 3~~ p sub 4 ) ~M sup -1$
and x sub e, y sub e, z sub e, and w sub e are the eye coordinates of the vertex, p sub 1, p sub 2, p sub 3, and p sub 4 are the values supplied in params, and M is the modelview matrix when
glTexGenis invoked. If M is poorly conditioned or singular, texture coordinates generated by the resulting function may be inaccurate or undefined.Note that the values in params define a reference plane in eye coordinates. The modelview matrix that is applied to them may not be the same one in effect when the polygon vertices are transformed. This function establishes a field of texture coordinates that can produce dynamic contour lines on moving objects.
If pname is
GL_SPHERE_MAPand coord is eitherGL_SorGL_T, s and t texture coordinates are generated as follows. Let u be the unit vector pointing from the origin to the polygon vertex (in eye coordinates). Let n sup prime be the current normal, after transformation to eye coordinates. Let.ce f ~=~ ( f sub x~~f sub y~~f sub z ) sup T be the reflection vector such that
.ce f ~=~ u ~-~ 2 n sup prime n sup prime sup T u
Finally, let m ~=~ 2 sqrt { f sub x sup {~2} + f sub y sup {~2} + (f sub z + 1 ) sup 2}. Then the values assigned to the s and t texture coordinates are
.ce 1 s ~=~ f sub x over m ~+~ 1 over 2 .sp .ce 1 t ~=~ f sub y over m ~+~ 1 over 2
To enable or disable a texture-coordinate generation function, call
glEnableorglDisablewith one of the symbolic texture-coordinate names (GL_TEXTURE_GEN_S,GL_TEXTURE_GEN_T,GL_TEXTURE_GEN_R, orGL_TEXTURE_GEN_Q) as the argument. When enabled, the specified texture coordinate is computed according to the generating function associated with that coordinate. When disabled, subsequent vertices take the specified texture coordinate from the current set of texture coordinates. Initially, all texture generation functions are set toGL_EYE_LINEARand are disabled. Both s plane equations are (1, 0, 0, 0), both t plane equations are (0, 1, 0, 0), and all r and q plane equations are (0, 0, 0, 0).- Parameter
coord Specifies a texture coordinate. Must be one of
GL_S,GL_T,GL_R, orGL_Q.- Parameter
pname Specifies the symbolic name of the texture-coordinate generation function. Must be
GL_TEXTURE_GEN_MODE.- Parameter
param Specifies a single-valued texture generation parameter, one of
GL_OBJECT_LINEAR,GL_EYE_LINEAR, orGL_SPHERE_MAP.- Parameter
coord Specifies a texture coordinate. Must be one of
GL_S,GL_T,GL_R, orGL_Q.- Parameter
pname Specifies the symbolic name of the texture-coordinate generation function or function parameters. Must be
GL_TEXTURE_GEN_MODE,GL_OBJECT_PLANE, orGL_EYE_PLANE.- Parameter
params Specifies a pointer to an array of texture generation parameters. If pname is
GL_TEXTURE_GEN_MODE, then the array must contain a single symbolic constant, one ofGL_OBJECT_LINEAR,GL_EYE_LINEAR, orGL_SPHERE_MAP. Otherwise, params holds the coefficients for the texture-coordinate generation function specified by pname.- Throws
GL_INVALID_ENUMis generated when coord or pname is not an accepted defined value, or when pname isGL_TEXTURE_GEN_MODEand params is not an accepted defined value.GL_INVALID_ENUMis generated when pname isGL_TEXTURE_GEN_MODE, params isGL_SPHERE_MAP, and coord is eitherGL_RorGL_Q.GL_INVALID_OPERATIONis generated ifglTexGenis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTexImage2D
voidglTexImage2D(inttarget,intlevel,intinternalformat,object|mapping(string:object)width,object|mapping(string:object)height,intborder,object|mapping(string:object)format,object|mapping(string:object)type,array(object|mapping(string:object))pixels)- Description
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable two-dimensional texturing, call
glEnableandglDisablewith argumentGL_TEXTURE_2D.To define texture images, call
glTexImage2D. The arguments describe the parameters of the texture image, such as height, width, width of the border, level-of-detail number (seeglTexParameter), and number of color components provided. The last three arguments describe how the image is represented in memory; they are identical to the pixel formats used forglDrawPixels.If target is
GL_PROXY_TEXTURE_2D, no data is read from pixels, but all of the texture image state is recalculated, checked for consistency, and checked against the implementation's capabilities. If the implementation cannot handle a texture of the requested texture size, it sets all of the image state to 0, but does not generate an error (seeglGetError). To query for an entire mipmap array, use an image array level greater than or equal to 1. .P If target isGL_TEXTURE_2D, data is read from pixels as a sequence of signed or unsigned bytes, shorts, or longs, or single-precision floating-point values, depending on type. These values are grouped into sets of one, two, three, or four values, depending on format, to form elements. If type isGL_BITMAP, the data is considered as a string of unsigned bytes (and format must beGL_COLOR_INDEX). Each data byte is treated as eight 1-bit elements, with bit ordering determined byGL_UNPACK_LSB_FIRST(seeglPixelStore).The first element corresponds to the lower left corner of the texture image. Subsequent elements progress left-to-right through the remaining texels in the lowest row of the texture image, and then in successively higher rows of the texture image. The final element corresponds to the upper right corner of the texture image.
format determines the composition of each element in pixels. It can assume one of nine symbolic values:
GL_COLOR_INDEXEach element is a single value, a color index. The GL converts it to fixed point (with an unspecified number of zero bits to the right of the binary point), shifted left or right depending on the value and sign of GL_INDEX_SHIFT, and added toGL_INDEX_OFFSET(seeglPixelTransfer). The resulting index is converted to a set of color components using theGL_PIXEL_MAP_I_TO_R,GL_PIXEL_MAP_I_TO_G,GL_PIXEL_MAP_I_TO_B, andGL_PIXEL_MAP_I_TO_Atables, and clamped to the range [0,1].GL_REDEach element is a single red component. The GL converts it to floating point and assembles it into an RGBA element by attaching 0 for green and blue, and 1 for alpha. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_GREENEach element is a single green component. The GL converts it to floating point and assembles it into an RGBA element by attaching 0 for red and blue, and 1 for alpha. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_BLUEEach element is a single blue component. The GL converts it to floating point and assembles it into an RGBA element by attaching 0 for red and green, and 1 for alpha. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_ALPHAEach element is a single alpha component. The GL converts it to floating point and assembles it into an RGBA element by attaching 0 for red, green, and blue. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_RGBEach element is an RGB triple. The GL converts it to floating point and assembles it into an RGBA element by attaching 1 for alpha. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_RGBAEach element contains all four components. Each component is multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_LUMINANCEEach element is a single luminance value. The GL converts it to floating point, then assembles it into an RGBA element by replicating the luminance value three times for red, green, and blue and attaching 1 for alpha. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).GL_LUMINANCE_ALPHAEach element is a luminance/alpha pair. The GL converts it to floating point, then assembles it into an RGBA element by replicating the luminance value three times for red, green, and blue. Each component is then multiplied by the signed scale factor GL_c_SCALE, added to the signed biasGL_c_BIAS, and clamped to the range [0,1] (seeglPixelTransfer).Refer to the
glDrawPixelsreference page for a description of the acceptable values for the type parameter.If an application wants to store the texture at a certain resolution or in a certain format, it can request the resolution and format with internalformat. The GL will choose an internal representation that closely approximates that requested by internalformat, but it may not match exactly. (The representations specified by
GL_LUMINANCE,GL_LUMINANCE_ALPHA,GL_RGB, andGL_RGBAmust match exactly. The numeric values 1, 2, 3, and 4 may also be used to specify the above representations.)Use the
GL_PROXY_TEXTURE_2Dtarget to try out a resolution and format. The implementation will update and recompute its best match for the requested storage resolution and format. To then query this state, callglGetTexLevelParameter. If the texture cannot be accommodated, texture state is set to 0.A one-component texture image uses only the red component of the RGBA color extracted from pixels. A two-component image uses the R and A values. A three-component image uses the R, G, and B values. A four-component image uses all of the RGBA components.
- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_2DorGL_PROXY_TEXTURE_2D.- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
internalformat Specifies the number of color components in the texture. Must be 1, 2, 3, or 4, or one of the following symbolic constants:
GL_ALPHA,GL_ALPHA4,GL_ALPHA8,GL_ALPHA12,GL_ALPHA16,GL_LUMINANCE,GL_LUMINANCE4,GL_LUMINANCE8,GL_LUMINANCE12,GL_LUMINANCE16,GL_LUMINANCE_ALPHA,GL_LUMINANCE4_ALPHA4,GL_LUMINANCE6_ALPHA2,GL_LUMINANCE8_ALPHA8,GL_LUMINANCE12_ALPHA4,GL_LUMINANCE12_ALPHA12,GL_LUMINANCE16_ALPHA16,GL_INTENSITY,GL_INTENSITY4,GL_INTENSITY8,GL_INTENSITY12,GL_INTENSITY16,GL_R3_G3_B2,GL_RGB,GL_RGB4,GL_RGB5,GL_RGB8,GL_RGB10,GL_RGB12,GL_RGB16,GL_RGBA,GL_RGBA2,GL_RGBA4,GL_RGB5_A1,GL_RGBA8,GL_RGB10_A2,GL_RGBA12, orGL_RGBA16.- Parameter
width Specifies the width of the texture image. Must be 2 sup n + 2 ( "border" ) for some integer n. All implementations support texture images that are at least 64 texels wide.
- Parameter
height Specifies the height of the texture image. Must be 2 sup m + 2 ( "border" ) for some integer m. All implementations support texture images that are at least 64 texels high.
- Parameter
border Specifies the width of the border. Must be either 0 or 1.
- Parameter
format Specifies the format of the pixel data. The following symbolic values are accepted:
GL_COLOR_INDEX,GL_RED,GL_GREEN,GL_BLUE,GL_ALPHA,GL_RGB,GL_RGBA,GL_LUMINANCE, andGL_LUMINANCE_ALPHA.- Parameter
type Specifies the data type of the pixel data. The following symbolic values are accepted:
GL_UNSIGNED_BYTE,GL_BYTE,GL_BITMAP,GL_UNSIGNED_SHORT,GL_SHORT,GL_UNSIGNED_INT,GL_INT, andGL_FLOAT.- Parameter
pixels Specifies a pointer to the image data in memory.
- Throws
GL_INVALID_ENUMis generated if target is notGL_TEXTURE_2DorGL_PROXY_TEXTURE_2D.GL_INVALID_ENUMis generated if format is not an accepted format constant. Format constants other thanGL_STENCIL_INDEXandGL_DEPTH_COMPONENTare accepted.GL_INVALID_ENUMis generated if type is not a type constant.GL_INVALID_ENUMis generated if type isGL_BITMAPand format is notGL_COLOR_INDEX.GL_INVALID_VALUEis generated if level is less than 0. .P .PGL_INVALID_VALUEmay be generated if level is greater than $log sub 2$max, where max is the returned value ofGL_MAX_TEXTURE_SIZE.GL_INVALID_VALUEis generated if internalformat is not 1, 2, 3, 4, or one of the accepted resolution and format symbolic constants.GL_INVALID_VALUEis generated if width or height is less than 0 or greater than 2 +GL_MAX_TEXTURE_SIZE, or if either cannot be represented as 2 sup k + 2("border") for some integer value of k.GL_INVALID_VALUEis generated if border is not 0 or 1.GL_INVALID_OPERATIONis generated ifglTexImage2Dis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTexParameter
voidglTexParameter(inttarget,intpname,float|int|array(float|int)param)- Description
Texture mapping is a technique that applies an image onto an object's surface as if the image were a decal or cellophane shrink-wrap. The image is created in texture space, with an (s, t) coordinate system. A texture is a one- or two-dimensional image and a set of parameters that determine how samples are derived from the image.
glTexParameterassigns the value or values in params to the texture parameter specified as pname. target defines the target texture, eitherGL_TEXTURE_1DorGL_TEXTURE_2D. The following symbols are accepted in pname:GL_TEXTURE_MIN_FILTERThe texture minifying function is used whenever the pixel being textured maps to an area greater than one texture element. There are six defined minifying functions. Two of them use the nearest one or nearest four texture elements to compute the texture value. The other four use mipmaps. A mipmap is an ordered set of arrays representing the same image at progressively lower resolutions. If the texture has dimensions 2 sup n times 2 sup m, there are bold max ( n, m ) + 1 mipmaps. The first mipmap is the original texture, with dimensions 2 sup n times 2 sup m. Each subsequent mipmap has dimensions 2 sup { k - 1 } times 2 sup { l - 1 }, where 2 sup k times 2 sup l are the dimensions of the previous mipmap, until either k = 0 or l=0. At that point, subsequent mipmaps have dimension 1 times 2 sup { l - 1 } or 2 sup { k - 1} times 1 until the final mipmap, which has dimension 1 times 1. To define the mipmaps, call glTexImage1D,glTexImage2D,glCopyTexImage1D, orglCopyTexImage2Dwith the level argument indicating the order of the mipmaps. Level 0 is the original texture; level bold max ( n, m ) is the final 1 times 1 mipmap. params supplies a function for minifying the texture as one of the following: .RS 10GL_NEARESTReturns the value of the texture element that is nearest (in Manhattan distance) to the center of the pixel being textured. GL_LINEARReturns the weighted average of the four texture elements that are closest to the center of the pixel being textured. These can include border texture elements, depending on the values of GL_TEXTURE_WRAP_SandGL_TEXTURE_WRAP_T, and on the exact mapping.GL_NEAREST_MIPMAP_NEARESTChooses the mipmap that most closely matches the size of the pixel being textured and uses the GL_NEARESTcriterion (the texture element nearest to the center of the pixel) to produce a texture value.GL_LINEAR_MIPMAP_NEARESTChooses the mipmap that most closely matches the size of the pixel being textured and uses the GL_LINEARcriterion (a weighted average of the four texture elements that are closest to the center of the pixel) to produce a texture value.GL_NEAREST_MIPMAP_LINEARChooses the two mipmaps that most closely match the size of the pixel being textured and uses the GL_NEARESTcriterion (the texture element nearest to the center of the pixel) to produce a texture value from each mipmap. The final texture value is a weighted average of those two values.GL_LINEAR_MIPMAP_LINEARChooses the two mipmaps that most closely match the size of the pixel being textured and uses the GL_LINEARcriterion (a weighted average of the four texture elements that are closest to the center of the pixel) to produce a texture value from each mipmap. The final texture value is a weighted average of those two values. .RE As more texture elements are sampled in the minification process, fewer aliasing artifacts will be apparent. While theGL_NEARESTandGL_LINEARminification functions can be faster than the other four, they sample only one or four texture elements to determine the texture value of the pixel being rendered and can produce moire patterns or ragged transitions. The initial value ofGL_TEXTURE_MIN_FILTERisGL_NEAREST_MIPMAP_LINEAR.GL_TEXTURE_MAG_FILTERThe texture magnification function is used when the pixel being textured maps to an area less than or equal to one texture element. It sets the texture magnification function to either GL_NEARESTorGL_LINEAR(see below).GL_NEARESTis generally faster thanGL_LINEAR, but it can produce textured images with sharper edges because the transition between texture elements is not as smooth. The initial value ofGL_TEXTURE_MAG_FILTERisGL_LINEAR. .RS 10GL_NEARESTReturns the value of the texture element that is nearest (in Manhattan distance) to the center of the pixel being textured. GL_LINEARReturns the weighted average of the four texture elements that are closest to the center of the pixel being textured. These can include border texture elements, depending on the values of GL_TEXTURE_WRAP_SandGL_TEXTURE_WRAP_T, and on the exact mapping..RE
GL_TEXTURE_WRAP_SSets the wrap parameter for texture coordinate s to either GL_CLAMPorGL_REPEAT.GL_CLAMPcauses s coordinates to be clamped to the range [0,1] and is useful for preventing wrapping artifacts when mapping a single image onto an object.GL_REPEATcauses the integer part of the s coordinate to be ignored; the GL uses only the fractional part, thereby creating a repeating pattern. Border texture elements are accessed only if wrapping is set toGL_CLAMP. Initially,GL_TEXTURE_WRAP_Sis set toGL_REPEAT.GL_TEXTURE_WRAP_TSets the wrap parameter for texture coordinate t to either GL_CLAMPorGL_REPEAT. See the discussion underGL_TEXTURE_WRAP_S. Initially,GL_TEXTURE_WRAP_Tis set toGL_REPEAT.GL_TEXTURE_BORDER_COLORSets a border color. params contains four values that comprise the RGBA color of the texture border. Integer color components are interpreted linearly such that the most positive integer maps to 1.0, and the most negative integer maps to -1.0. The values are clamped to the range [0,1] when they are specified. Initially, the border color is (0, 0, 0, 0). GL_TEXTURE_PRIORITYSpecifies the texture residence priority of the currently bound texture. Permissible values are in the range [0,\ 1]. See glPrioritizeTexturesandglBindTexturefor more information.- Parameter
target Specifies the target texture, which must be either
GL_TEXTURE_1DorGL_TEXTURE_2D.- Parameter
pname Specifies the symbolic name of a single-valued texture parameter. pname can be one of the following:
GL_TEXTURE_MIN_FILTER,GL_TEXTURE_MAG_FILTER,GL_TEXTURE_WRAP_S,GL_TEXTURE_WRAP_T, orGL_TEXTURE_PRIORITY.- Parameter
param Specifies the value of pname.
- Parameter
target Specifies the target texture, which must be either
GL_TEXTURE_1DorGL_TEXTURE_2D.- Parameter
pname Specifies the symbolic name of a texture parameter. pname can be one of the following:
GL_TEXTURE_MIN_FILTER,GL_TEXTURE_MAG_FILTER,GL_TEXTURE_WRAP_S,GL_TEXTURE_WRAP_T,GL_TEXTURE_BORDER_COLOR, orGL_TEXTURE_PRIORITY.- Parameter
params Specifies a pointer to an array where the value or values of pname are stored.
- Throws
GL_INVALID_ENUMis generated if target or pname is not one of the accepted defined values.GL_INVALID_ENUMis generated if params should have a defined constant value (based on the value of pname) and does not.GL_INVALID_OPERATIONis generated ifglTexParameteris executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTexSubImage2D
voidglTexSubImage2D(inttarget,intlevel,intxoffset,intyoffset,object|mapping(string:object)width,object|mapping(string:object)height,object|mapping(string:object)format,object|mapping(string:object)type,array(object|mapping(string:object))pixels)- Description
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable two-dimensional texturing, call
glEnableandglDisablewith argumentGL_TEXTURE_2D.glTexSubImage2Dredefines a contiguous subregion of an existing two-dimensional texture image. The texels referenced by pixels replace the portion of the existing texture array with x indices xoffset and "xoffset"~+~"width"~-~1, inclusive, and y indices yoffset and "yoffset"~+~"height"~-~1, inclusive. This region may not include any texels outside the range of the texture array as it was originally specified. It is not an error to specify a subtexture with zero width or height, but such a specification has no effect.- Parameter
target Specifies the target texture. Must be
GL_TEXTURE_2D.- Parameter
level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
- Parameter
xoffset Specifies a texel offset in the x direction within the texture array.
- Parameter
yoffset Specifies a texel offset in the y direction within the texture array.
- Parameter
width Specifies the width of the texture subimage.
- Parameter
height Specifies the height of the texture subimage.
- Parameter
format Specifies the format of the pixel data. The following symbolic values are accepted:
GL_COLOR_INDEX,GL_RED,GL_GREEN,GL_BLUE,GL_ALPHA,GL_RGB,GL_RGBA,GL_LUMINANCE, andGL_LUMINANCE_ALPHA.- Parameter
type Specifies the data type of the pixel data. The following symbolic values are accepted:
GL_UNSIGNED_BYTE,GL_BYTE,GL_BITMAP,GL_UNSIGNED_SHORT,GL_SHORT,GL_UNSIGNED_INT,GL_INT, andGL_FLOAT.- Parameter
pixels Specifies a pointer to the image data in memory.
- Throws
GL_INVALID_ENUMis generated if target is notGL_TEXTURE_2D.GL_INVALID_OPERATIONis generated if the texture array has not been defined by a previousglTexImage2Doperation.GL_INVALID_VALUEis generated if level is less than 0. .P PGL_INVALID_VALUEmay be generated if level is greater than log sub 2max, where max is the returned value ofGL_MAX_TEXTURE_SIZE.GL_INVALID_VALUEis generated if "xoffset" ~<~ ~-b, ("xoffset"~+~"width") ~>~ (w~-~b), "yoffset" ~<~ ~-b, or ("yoffset" ~+~ "height") ~>~ (h~-~b). Where w is theGL_TEXTURE_WIDTH, h is theGL_TEXTURE_HEIGHT, and b is the border width of the texture image being modified. Note that w and h include twice the border width.GL_INVALID_VALUEis generated if width or height is less than 0.GL_INVALID_ENUMis generated if format is not an accepted format constant.GL_INVALID_ENUMis generated if type is not a type constant.GL_INVALID_ENUMis generated if type isGL_BITMAPand format is notGL_COLOR_INDEX.GL_INVALID_OPERATIONis generated ifglTexSubImage2Dis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglTranslate
voidglTranslate(float|int|array(float|int)x,float|int|voidy,float|int|voidz)- Description
glTranslateproduces a translation by ("x","y","z"). The current matrix (seeglMatrixMode) is multiplied by this translation matrix, with the product replacing the current matrix, as ifglMultMatrixwere called with the following matrix for its argument: .sp .ce .EQ left ( ~ down 20 matrix { ccol { 1~~ above 0~~ above 0~~ above 0~~ } ccol { 0~~ above 1~~ above 0~~ above 0~~ } ccol { 0~~ above 0~~ above 1~~ above 0~~ } ccol { "x"~ above "y"~ above "z"~ above 1} } ~~right ) .EN .sp .RE If the matrix mode is eitherGL_MODELVIEWorGL_PROJECTION, all objects drawn after a call toglTranslateare translated.Use
glPushMatrixandglPopMatrixto save and restore the untranslated coordinate system.- Parameter
x Specify the x, y, and z coordinates of a translation vector.
- Throws
GL_INVALID_OPERATIONis generated ifglTranslateis executed between the execution ofglBeginand the corresponding execution ofglEnd.
- MethodglVertex
voidglVertex(float|int|array(float|int)x,float|int|voidy,float|int|voidz,float|int|voidw)- Description
glVertexcommands are used withinglBegin/glEndpairs to specify point, line, and polygon vertices. The current color, normal, and texture coordinates are associated with the vertex whenglVertexis called.When only x and y are specified, z defaults to 0 and w defaults to 1. When x, y, and z are specified, w defaults to 1.
- Parameter
x Specify x, y, z, and w coordinates of a vertex. Not all parameters are present in all forms of the command.
- Parameter
v Specifies a pointer to an array of two, three, or four elements. The elements of a two-element array are x and y; of a three-element array, x, y, and z; and of a four-element array, x, y, z, and w.
- MethodglViewport
voidglViewport(intx,inty,intwidth,intheight)- Description
glViewportspecifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x sub nd, y sub nd) be normalized device coordinates. Then the window coordinates (x sub w, y sub w) are computed as follows: .sp .ce .EQ x sub w ~=~ ( x sub nd + 1 ) left ( "width" over 2 right ) ~+~ "x" .EN .sp .ce .EQ y sub w ~=~ ( y sub nd + 1 ) left ( "height" over 2 right ) ~+~ "y" .EN .REViewport width and height are silently clamped to a range that depends on the implementation. To query this range, call
glGetwith argumentGL_MAX_VIEWPORT_DIMS.- Parameter
x Specify the lower left corner of the viewport rectangle, in pixels. The initial value is (0,0).
- Parameter
width Specify the width and height of the viewport. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
- Throws
GL_INVALID_VALUEis generated if either width or height is negative.GL_INVALID_OPERATIONis generated ifglViewportis executed between the execution ofglBeginand the corresponding execution ofglEnd.
Module GL.GLSLUtils
- Description
This module contains various utilities that greatly simplifies working with GLSL and some other extensions such as vertex buffers and render buffers.
- Methodadd_shader_define
voidadd_shader_define(stringx)- Description
Add a preprocessing define that will be used for all shader compilations from now forward.
- Methodadd_shader_path
voidadd_shader_path(stringx)- Description
Adds a directory to the list of directories where shaders can be found.
- Methodget_program
GLSLProgramget_program(stringfilename)- Description
Convenice function to compile and cache a GLSLProgram
- Methodset_shader_ext
voidset_shader_ext(stringx)- Description
Set the extension added to all shader filerequests. The default is to never add an extension, which means that the full filename has to be specified.
Class GL.GLSLUtils.GLSLProgram
- Description
This class keeps track of all state related to a GLSL program, such as the shaders (vertex and pixel), the uniform variables and any vertex buffer objects or textures.
- Methodadd_texture
voidadd_texture(stringname,int|objecttype_or_texture,int|voidid)- Description
Adds a texture to the list of textures used by the shader. If this function is used the allocation of texture units is done automatically by this class.
There are really two variants of this function: If
type_or_textureis an integer, theidindicates the texture object ID (as given byglGenTextures), andtype_or_textureindicates the texture type (GL_TEXTURE_2D etc).If
type_or_textureis an object, it's assumed that there is a texture_type member variable (indicating the texture type, such as GL_TEXTURE_2D) and a use method that will bind the texture to the currently active texture unit.The GLUE.Texture class meets these requirements. The
RenderBufferobjects does not, however.A RenderBuffer can be added as an texture by calling
add_texture( name, buffer->texture_type, buffer->texture )There are currently no checks done to ensure that you don't use more textures than there are texture units on your graphics card.
- Methodadd_vertex_buffer
voidadd_vertex_buffer(VertexBuffervbo)- Description
Add all vertex attributes defined in the VertexBuffer vbo. This is equivalent to calling
vertex_pointeronce for each attribute (with the difference that stride, size and offset are calculated automatically for you)
- Methodcompile_file
intcompile_file(stringfile_name)- Description
Compile the shader source found in
file_name. If filename is relative, the paths added byadd_shader_pathwill be searched. If -1 is returned, no file was compiled.This function is usually called from the
createmethod, but if no filename is passed there you can call this function (or thecompile_stringfunction) to specify the source.The file is compiled twice, once with VERTEX_SHADER defined, the other time with FRAGMENT_SHADER defined.
The functions vertex_main and fragment_main are special, in that when the vertex shader is compiled vertex_main is renamed to main and fragment_main is totally removed from the source. When the fragment shader is compiled it's the other way around.
- Methodcompile_string
intcompile_string(stringcode,stringpath)- Description
Compile the given string as a pixel/vertex shader. The string is compiled twice, once with VERTEX_SHADER defined, the other time with FRAGMENT_SHADER defined.
The functions vertex_main and fragment_main are special, in that when the vertex shader is compiled vertex_main is renamed to main and fragment_main is totally removed from the source. When the fragment shader is compiled it's the other way around.
This is done to make it easier to develop shaders, it's generally speaking more convenient to have them in one file that it is to have them in two.
- Methodcreate
GL.GLSLUtils.GLSLProgramGL.GLSLUtils.GLSLProgram(string|voidname)- Description
Create a new GLSL shader. If
nameis specified, it indicates a filename passed tocompile_file.
- Methoddisable
voiddisable()- Description
Disable this program. This will also disable all extra texture units that were needed to render with it, if any, and unbind the vertex pointer attributes, if any.
- Methoddraw
voiddraw(function(:void)x,mixed...args)- Description
Call the function
x(@args) with this program activated.This will bind all texture units to their correct textures, set up any vertex pointers that have been defined, and set uniforms to their value.
Once the function has been called, all texture units except the default one will be disabled, and the vertex array pointers will be reset.
- Methodset
voidset(stringname,mixed...to)- Description
Set the uniform variable
nameto the valueto(one or more floats or integers). The value will remain in effect until the next time this function is called (even if another program is used in between)
- Methoduse
voiduse()- Description
Enable the program, setting all uniform variables to their values as set by
set, enabling the required number of texture units and binding the correct textures, as given byadd_textureand finally initializing any vertex pointers set usingvertex_pointeroradd_vertex_buffer.
- Methodvertex
voidvertex(stringname,mixed...to)- Description
Set the vertex attribute
nametoto.tois one or more floats or integers.The attibute will have this value for all new glVertex calls until this function is called again.
- Methodvertex_pointer
voidvertex_pointer(stringname,intptr,intsize,inttype,boolnormalize,intstride,intoffset)- Description
Add a single vertex attribute pointer. This is usually used in combination with glDrawArrays to quickly draw a lot of primitives.
nameis the name of the vertex type variable in the program.ptris the vertex buffer ID.sizeis the size of the attribute (a vec3 has size 3, as an example)typeis the type, usually GL_FLOAT (actually, anything else requires extensions not currently supported by this class) Ifnormalizeis true, the value will be clamped between 0.0 and 1.0.strideis the distance between two attributes of this type in the buffer, andoffsetis the offset from the start of the buffer to the first attribute.
Class GL.GLSLUtils.RenderBuffer
- Description
A rendering buffer. This is usually used to do offscreeen-rendering with higher precision, or full-screen special effects such as blur etc. This class is not present if there is no FramebufferTexture2DEXT extention available. To my knowledge all cards with GLSL support also support this feature.
- Variablemipmaps
Variablealpha boolGL.GLSLUtils.RenderBuffer.mipmapsboolGL.GLSLUtils.RenderBuffer.alpha- Description
Does the RenderBuffer has mipmaps and alpha channel?
- Variabledb
intGL.GLSLUtils.RenderBuffer.db- Description
The object ID of the depth buffer object, if any. Otherwise -1
- Variableinternal_format
Variableformat intGL.GLSLUtils.RenderBuffer.internal_formatintGL.GLSLUtils.RenderBuffer.format- Description
The format of the texture object
- Variablewidth
Variableheight intGL.GLSLUtils.RenderBuffer.widthintGL.GLSLUtils.RenderBuffer.height- Description
Width and height, in pixels, of the buffer
- Variabletexture_type
intGL.GLSLUtils.RenderBuffer.texture_type- Description
The type of the texture, GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB typically.
- Methodbox
voidbox(floatx,floaty,floatw,floath)- Description
Draw the buffer using a GL_QUADS at x,y sized w,h. This function knows about GL_TEXTURE_2D and GL_TEXTURE_RECTANGLE_ARB texture coordinates, but not any other ones.
- Methodcreate
GL.GLSLUtils.RenderBufferGL.GLSLUtils.RenderBuffer(intw,inth,inttype,booldepth,boolmipmap,boolalpha,int|voidinternal_format,int|voidformat)- Description
Create a new render buffer, with the size given by
wandh, the texture target will betype(generally speaking GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB, the latter is needed if the size is not a power of two. This is not checked by the create function)depthmipmapandalphaspecifies if the corresponding extra buffers should be created.mipmapis not supported for GL_TEXTURE_RECTANGLE_ARBIf
worhis 0, the actual texture creation is postponed untilresizeis called. The buffer will not be valid before it has a size.If
internal_formatandformatare specified they are used to override the defaults (GL_RGB[A]16F_ARB and GL_RGB[A] respectively)Setting these also makes the buffer ignore the
alphaparamenter.The
mipmapparameter depends on the existance of the glGenerateMipmapEXT extension.
- Methoddisable
voiddisable()- Description
Restore the viewport and bind the screen as the active rendering buffer.
- Methoddraw
voiddraw(function(:void)f,mixed...args)- Description
Convenience function that binds the buffer as the currently active destination buffer, then calls
fand finally binds the default framebuffer (generally speaking the screen) as the active buffer again.This is equivalent to
usefollowed byf(args) followed bydisableThis function is usually what is used to draw into a RenderBuffer.
- Methoddraw_texture
voiddraw_texture(function(:void)f)- Description
Bind the buffer to the currently active texture unit, then call the specified function.
- Methodresize
boolresize(intw,inth)- Description
Resize the buffer to a new size. Returns true if a new texture was created.
- Methodsize
array(float) size()- Description
Width and height, suitable for texture coordinates, of the buffer. For GL_TEXTURE_2D this is always 1.0 x 1.0. For GL_TEXTURE_RECTANGLE_ARB it's the pixel sizes (as floats)
This function knows about GL_TEXTURE_2D and GL_TEXTURE_RECTANGLE_ARB texture coordinates, but not any other ones.
- Methoduse
voiduse()- Description
Set the viewport to the size of the texture, and set this buffer as the currently active destination framebuffer.
disable() must be called (exactly once) once you are done drawing into this buffer, or OpenGL will run out of attribute stack space eventually since the current viewport is pused to it.
drawwill do the use() / disable() handling for you.
Class GL.GLSLUtils.VertexBuffer
- Description
This class defines a vertex buffer. This is a chunk of memory defining vertex attributes for future drawing. Any number of vertex buffers (up to a hardware specific limit) can be added to any GLSLProgram.
Vertex buffers are generally speaking stored on the graphic card for fast access, making it possible to draw huge amounts of primitives without using all available CPU->GPU memory bandwidth.
Normal usage of this class is to create it, then call add_[type] for each vertex attribute (
add_float,add_vec2etc) defined in your program, then callset_sizeorset_datato set the size of the buffer, add the VertexBuffer to any relevant GLSLProgram instances, and then optionally callpwrite,vertexorstream_vertex() to update the data.The add_* functions can not be called once the VertexBuffer has been added to a
GLSLProgram.set_size,set_dataorrecalcmust be called before the VertexBuffer is added to aGLSLProgram.
- Variablecurrent_size
intGL.GLSLUtils.VertexBuffer.current_size- Description
The maximum offset ever written using
stream
- Variableid
intGL.GLSLUtils.VertexBuffer.id- Description
The vertexbuffer id (the object id passed to
glBindBuffer).
- Variableoffset
intGL.GLSLUtils.VertexBuffer.offset- Description
The index of the last vertex that was written using
stream
- Variablesize
intGL.GLSLUtils.VertexBuffer.size- Description
The total size of the VertexBuffer, counted in vertices
- Variablevertex_size
intGL.GLSLUtils.VertexBuffer.vertex_size- Description
The size of a single vertex, in floats
- Methodadd_alias
voidadd_alias(stringname,stringname2,int|voidsize)- Description
Add
nameas an alias forname2. As an example add_alias( "normal", "pos") will make the vertex attribute normal have the same value as pos without using additional storage.The size can be smaller than the size for the original attribute, but never larger. If no size is given they will have the same size.
- Methodadd_attribute
voidadd_attribute(stringname,inttype,boolnormalize,intsize)- Description
Add a generic attribute named
name, of the typetype(eg, GL_FLOAT),normalizedor not of sizesize.As an example add_vec2(
name) is an alias for add_attribute(name, GL_FLOAT, GL_FALSE, 2 )
- Methodattributes
array(array(string|int|bool)) attributes()- Description
Method used by
GLSLProgramto get a list of the attributes.
- Methodcreate
GL.GLSLUtils.VertexBufferGL.GLSLUtils.VertexBuffer(intdraw_mode)- Description
Create a new vertex buffer, draw_mode is a usage hint.
GL_STREAM_DRAW: Draw multiple times, updating the data ocassionally GL_STATIC_DRAW: Set the data once, then draw multiple times GL_DYNAMIC_DRAW: Draw and update all the time
The mode is only a hint, it does not really affect the functionality of the buffer.
- Methodpwrite
voidpwrite(intoffset,array(float)data)- Description
Write
dataat the byteoffsetoffset. The size of a vertex is given by thestridemember variable in this class.It's usually more convenient to use the
vertexorstreammethods when updating data.
- Methodrecalc
voidrecalc()- Description
Recalculate the offsets for all attributes. Normally called automatically from set_data and set_size.
- Methodset_data
voidset_data(array(float)data)- Description
Set the data to an array of floating point numbers. The attributes are always ordered in the array according to the order the various add_* functions were called. Note that add_alias does not add a new attribute, only an alias for an existing one.
- Methodset_size
voidset_size(intsize)- Description
Set the size of the VertexBuffer. The size is given in
strideincrements. That is, it defines the number of complete vertexes that can be generated from this buffer, not the number of floats or bytes in it.set_sizewill remove all the data that was previously present in the buffer.
- Methodstream
voidstream(array(float)data)- Description
Append the
datato the current object. Once the end of the buffer has been reached, start over from the beginning. This is useful for particle systems of various kinds, where each vertex (or every few vertices) indicate a separate particle that evolves over time using a GLSLProgram, and there is no need to send the whole list to the graphic card each frame.When calling glDrawArrays using this kind of VertexBuffer, use the current_size member variable, it indicates the last fully written vertice.
- Methodvertex
voidvertex(intvertex,array(float)data)- Description
Give data starting at the given vertex. Any number of vertices up to the full size of the VertexBuffer can be written from this point onwards.
Class GL.GLSLUtils.VertexBuffer.Attribute
- Variablename
Variabletype
Variablenormalize
Variablesize
Variableoffset stringGL.GLSLUtils.VertexBuffer.Attribute.nameintGL.GLSLUtils.VertexBuffer.Attribute.typeboolGL.GLSLUtils.VertexBuffer.Attribute.normalizeintGL.GLSLUtils.VertexBuffer.Attribute.sizeintGL.GLSLUtils.VertexBuffer.Attribute.offset
- Method__create__
protectedlocalvoid__create__(stringname,inttype,boolnormalize,intsize,intoffset)
- Variablename
Class GL.GLSLUtils.vec
- Description
A very basic vector class. Use
vec2/vec3orvec4
Class GL.GLSLUtils.vec2
- Description
A vector class somewhat similar to a GLSL vec2.
Class GL.GLSLUtils.vec3
- Description
A vector class somewhat similar to a GLSL vec3.
Module GLU
- Description
The GL Utilities module is a partial implementation of the GLU library. This module only contains functions that someone at some point actually needed to get his work done. If you need a GLU function that isn't in here, copy the C code from the GLU library (Mesa was used last time), tweak it so that it compiles as Pike code and then check it in into git.
- MethodgluLookAt
voidgluLookAt(floateyex,floateyey,floateyez,floatcenterx,floatcentery,floatcenterz,floatupx,floatupy,floatupz)voidgluLookAt(Math.Matrixeye,Math.Matrixcenter,Math.Matrixup)- Description
gluLookAt creates a viewing matrix derived from an
eyepoint, a reference point indicating thecenterof the scene, and anupvector. The matrix maps the reference point to the negative z axis and the eye point to the origin, so that, when a typical projection matrix is used, the center of the scene maps to the center of the viewport. Similarly, the direction described by the up vector projected onto the viewing plane is mapped to the positive y axis so that it points upward in the viewport. The up vector must not be parallel to the line of sight from the eye to the reference point.The matrix generated by gluLookAt postmultiplies the current matrix.
The relation between the matrix objects and the float values are
Math.Matrix eye =Math.Matrix(({ eyex, eyey, eyez }));- See also
GL.glFrustum,gluPerspective
- MethodgluOrtho2D
voidgluOrtho2D(floatleft,floatright,floatbottom,floattop)- Description
gluOrtho2D sets up a two-dimensional orthographic viewing region. This is equivalent to calling
glOrtho(left, right, bottom, top, -1.0, 1.0);- FIXME
The GLU manual says
glOrtho(a,b,c,d, 0, 1).- See also
GL.glOrtho,gluPerspective
- MethodgluPerspective
voidgluPerspective(floatfovy,floataspect,floatzNear,floatzFar)- Description
gluPerspective specifies a viewing frustum into the world coordinate system. In general, the aspect ratio in gluPerspective should match the aspect ratio of the associated viewport. For example, aspect = 2.0 means the viewer's angle of view is twice as wide in x as it is in y. If the viewport is twice as wide as it is tall, it displays the image without distortion.
The matrix generated by gluPerspective is multipled by the current matrix, just as if
GL.glMultMatrixwere called with the generated matrix. To load the perspective matrix onto the current matrix stack instead, precede the call to gluPerspective with a call toGL.glLoadIdentity.
- MethodgluPickMatrix
voidgluPickMatrix(floatx,floaty,floatwidth,floatheight,array(int)viewport)- Description
gluPickMatrix creates a projection matrix that can be used to restrict drawing to a small region of the viewport. This is typically useful to determine what objects are being drawn near the cursor. Use gluPickMatrix to restrict drawing to a small region around the cursor. Then, enter selection mode (with
GL.glRenderModeand rerender the scene. All primitives that would have been drawn near the cursor are identified and stored in the selection buffer.The matrix created by gluPickMatrix is multiplied by the current matrix just as if
GL.glMultMatrixis called with the generated matrix. To effectively use the generated pick matrix for picking, first callGL.glLoadIdentityto load an identity matrix onto the perspective matrix stack. Then call gluPickMatrix, and finally, call a command (such asgluPerspective) to multiply the perspective matrix by the pick matrix.When using gluPickMatrix to pick NURBS, be careful to turn off the NURBS property GLU_AUTO_LOAD_MATRIX. If GLU_AUTO_LOAD_MATRIX is not turned off, then any NURBS surface rendered is subdivided differently with the pick matrix than the way it was subdivided without the pick matrix.
- Parameter
viewport The viewport is an array with four integers.
- FIXME
Does the NURB remark apply?
- See also
GL.glGet,gluLoadIdentity,gluMultMatrix,gluRenderMode,gluPerspective
- MethodgluProject
array(float)|zerogluProject(floatobjx,floatobjy,floatobjz,array(float)model,array(float)proj,array(int)viewport)- Description
gluProject transforms the specified object coordinates into window coordinates using
model,proj, andviewport. The result is returned in a three valued array.
Module GLUE
- Description
GL Universal Environment
- MethodPushPop
voidPushPop(function(:void)f)- Description
Performs function
fbetweenGL.glPushMatrixandGL.glPopMatrixcalls.- Example
PushPop() { GL.glTranslate( 0.01, -0.9, 0.0 ); write_text( "Press esc to quit" ); };
- Methodadd_reinit_callback
voidadd_reinit_callback(function(void:void)f)- Description
Add a callback that will be called every time the resolution is about to change.
- See also
remove_reinit_callback
- Methodallocate_light
intallocate_light()- Description
Allocate a hardwareaccelerated lightsource from OpenGL.
- Returns
an id which may be added to the GL.GL_LIGHT0 constant.
- See also
free_light
- Methoddebug_stuff
mapping(string:mixed) debug_stuff()- Description
Returns some internal states for debug purposes. The actual content may change.
- Methoddraw_box
voiddraw_box(floatx0,floaty0,floatx1,floaty1,array(Image.Color.Color)|Image.Color.Colorc,void|array(float)|floata)- Description
Draw a box at the specified coordinates.
cis either a single color, in which case it will be used for all corners, or an array of four colors, which will be used for each corner.ais similar toc, but is the alpha values for each coordinate.
- Methoddraw_line
voiddraw_line(floatx0,floaty0,floatx1,floaty1,Image.Color.Colorc,void|floata)voiddraw_line(floatx0,floaty0,floatz0,floatx1,floaty1,floatz1,Image.Color.Colorc,void|floata)
- Methoddraw_obox
voiddraw_obox(floatx0,floaty0,floatx1,floaty1,array(Image.Color.Color)|Image.Color.Colorc,void|array(float)|floata)- Description
Draw a box outline around the specified coordinates.
cis either a single color, in which case it will be used for all corners, or an array of four colors, which will be used for each corner.ais similar toc, but is the alpha values for each coordinate.
- Methodfree_light
voidfree_light(intl)- Description
Call this function to free a lightsource that has been allocated with
allocate_light.- Parameter
l Id which has been allocated using
allocate_light.- See also
allocate_light
- Methodget_all_lists
array(List) get_all_lists()- Description
Returns all defined lists. Only available on Windows.
- Methodget_all_textures
array(BaseTexture) get_all_textures()- Description
Returns a list of all current textures.
- Methodget_drivers
array(string) get_drivers()- Description
Returns the name of the available drivers.
- See also
init
- Methodget_gl_flags
intget_gl_flags()- Description
Returns the GL flags currently used.
- See also
set_gl_flags
- Methodget_screen_mode
boolget_screen_mode()- Description
Returns 1 if in fullscreen mode, otherwise 0.
- See also
toggle_fullscreen
- Methodget_texture_mem_usage
intget_texture_mem_usage()- Description
Returns the number of bytes used by the textures.
- Methodhas_extension
boolhas_extension(stringext)- Description
Checks if the GL extension
extis currently supported.
- Methodinit
voidinit(mapping(string:mixed)|voidoptions)- Description
Initializes GLUE and loads a driver from a list of drivers. If a driver fails to load or initialize, the next driver is tried.
- Throws
driver_namesnot listed in the result fromget_driverswill cause an error to be thrown.- Parameter
options "driver_names":string|array(string)The name of a driver or a list of drivers to try, in given order. If no driver name is given, the list given by
get_driversis used."event_callback":function(.Events.Event:void)This callback is called with a
Events.Eventobject whenever an event is trapped by the driver. If no event callback is given, a callback that callsexit(0)on Escape and Exit events is used."resize_callback":function(float,bool:void)This callback is called with the aspect whenever the drawing area is resized, either by an event or explicitly by the program.
"fullscreen":boolSet fullscreen/window mode. 1 is fullscreen, 0 is window. Defaults to fullscreen.
"resolution":array(int)Sets the resolution of the drawing area. Defaults to ({ 800, 600 }).
"aspect":floatSets the aspect of the drawing area. Defaults to 1.333333 (4:3).
"depth":intSets the color depth of the drawing area. Defaults to 32.
"title":stringSets the window title to this string.
"icon_title":stringSets the icon title to this string.
"fast_mipmap":boolUse GL_NEAREST_MIMAP_NEAREST instead of GL_LINEAR_MIPMAP_LINEAR, which also is the default.
"rotation":floatThe rotation in z-axis of the drawing field.
"mirror":stringMirroring in x and/or y axis.
- See also
get_drivers
- Methodmake_rect_texture
BaseTexturemake_rect_texture(mapping|Image.Imageimage,string|voidname)- Description
Create a texture with the specified image as contents. Will try to use the TEXTURE_RECTANGLE_NV extension if available, otherwise normal textures will be used (like
make_texture).- See also
make_texture
- Methodmake_texture
BaseTexturemake_texture(mapping|Image.Imageimage,string|voidname)- Description
Create a texture. Mainly here for symetry with
make_rect_texture- See also
Texture,make_rect_texture
- Methodmirror_screen
voidmirror_screen(stringhow)- Description
Mirrors the screen in x and/or y axis. Useful e.g. when drawing for backlight projection.
- Parameter
how A string that contains the mirror axis, e.g.
"x"or"xy".
- Methodpushpop_depth
int(0..)pushpop_depth()- Description
Returns the PushPop depth, i.e. the number of pushes awaiting corresponding pops.
- Methodremove_reinit_callback
voidremove_reinit_callback(function(void:void)f)- Description
Removes a reinitialization callback.
- See also
add_reinit_callback
- Methodset_aspect
voidset_aspect(floatasp)voidset_aspect(intw,inth)- Description
Set the aspect of the draw area. Does nothing if the provided aspect is equal to the one currently used.
- See also
get_aspect
- Methodset_resolution
voidset_resolution(intw,inth)- Description
Sets the resolution to
wxhpixels.- See also
xsize,ysize
- Methodset_screen_rotation
voidset_screen_rotation(floatdeg)- Description
Rotates the drawing area
degdegrees. Useful e.g. when drawing for tilted monitors.
- Methodtoggle_fullscreen
voidtoggle_fullscreen(void|bool_fullscreen)- Description
Toggles between fullscreen and window mode. If a screen mode is provided, that mode will be assumed.
- See also
get_screen_mode
- Methodxsize
Methodysize intxsize()intysize()- Description
Returns the screen width/height.
- See also
set_resolution
Class GLUE.BaseDWIM
- Description
A mixin class with a dwim create function.
- Methodcreate
GLUE.BaseDWIMGLUE.BaseDWIM(mixed...args)- Description
This create function has the following heuristic:
If a mapping is encountered, the following information will be attempted to be extracted.
"image":Image.ImageThe texture image.
"xsize":intThe image dimensions. If not provided, the dimensions of the
"image"member will be used."ysize":int"height":int"width":int"alpha":intThe alpha mode.
"mipmap":boolShould the texture be mipmapped or not.
"clamp":boolShould the texture be clamped or not.
"mode":intThe texture mode.
"debug":stringThe debug name associated with this texture.
If an object is encountered in the argument list, the first object will be used as texture image and the second as texture alpha.
If a string is encountered in the argument list, it will be used as debug name associated with this texture.
Once all mappings, strings and objects are removed from the argument list, the remaining integers will be interpreted as width, height, alpha, mipmap and mode, unless there is only one argument. In that case it will be interpreted as the alpha mode.
Class GLUE.BaseTexture
- Description
The texture base class. Using e.g.
Texturemight be more convenient.
- Variablewidth_u
Variableheight_u floatGLUE.BaseTexture.width_ufloatGLUE.BaseTexture.height_u- Description
Utilization in percent.
- Variablei_width
Variablei_height intGLUE.BaseTexture.i_widthintGLUE.BaseTexture.i_height- Description
Image dimensions
- Variablet_width
Variablet_height intGLUE.BaseTexture.t_widthintGLUE.BaseTexture.t_height- Description
Texture dimensions
- Variabletexture_type
intGLUE.BaseTexture.texture_type- Description
The texture type, e.g.
GL.GL_TEXTURE_2D.
- Method_sizeof
intsizeof(GLUE.BaseTexturearg)- Description
Returns the size of memory allocated by the texture.
- Methodconstruct
voidconstruct(intwidth,intheight,int_alpha,mapping|voidimgs,int(2bit)|voidflags,int|void_mode,string|voiddebug_text)- Description
Construct a new texture. Processes
_alpha,_modeanddebug_textand callsresize.- Parameter
_alpha The alpha mode the texture is operating in.
0RGB
1RGBA
2ALPHA
3LUM
4LUM+ALPHA
- Parameter
_mode The mode the texture is operating in. Autoselected wrt
_alphaif0.- Parameter
debug_text A string that can be used to identify this texture.
- Methodcreate_texture
voidcreate_texture(mapping|voidimgs,int(2bit)|voidflags,int|voidwidth,int|voidheight)- Description
Actually creates the texture.
- Parameter
imgs If zero, a black texture with the dimensions
width*heightwill be generated. Otherwiseimgsshould be a mapping as follows."image":Image.ImageThe actual image to be used as texture. It will be cropped/padded to meet the dimensions given in
widthandheight."alpha":Image.ImageOptional image to be used as alpha channel, depending on the alpha value given to
create/construct.- Parameter
flags If
1, the texture will be mipmapped. If bit 1 (2) is set, texture will not be wrapped but clamped.- Parameter
width - Parameter
height The dimensions of the texture. If omitted the dimensions of the images in
imgswill be used.- See also
resize
- Methoddraw
voiddraw(floatx,floaty,floatz,floatw,floath)- Description
Draw the texture at
x,y,zwith dimensionsw*h.
- Methoddraw_region
voiddraw_region(floatx,floaty,floatz,floatw,floath,floats0,floatq0,floatss,floatqs)- Description
Draw texture region
s0,q0-ss,qsatx,y,zwith dimensionsw*h.
- Methodmake_mipmap
voidmake_mipmap(mappingimgs,int|voidimode,int|voiddx,int|voiddy)- Description
Renders a mipmap of the image/partial image
imgs.- Parameter
imgs Image data mapping to feed
GL.glTexImage2DorGL.glTexSubImage2D.- Parameter
imode Internal format to feed
GL.glTexImage2D, or UNDEFINED for partial images.- Parameter
dx - Parameter
dy Xoffs, yoffs to feed
GL.glTexSubImage2Dfor partial images.- See also
create_texture
- Methodpaste
voidpaste(zero|Image.Imagei,Image.Imagea,intx,inty)- Description
Paste the image
iwith alpha channelaat coordinatesxandyin the current texture.
- Methodresize
voidresize(intwidth,intheight,mapping|voidimgs,int(2bit)|voidflags,bool|voidnocreate)- Description
Resizes/creates a texture to meet the dimensions
widthandheight. Ifnocreateisn't given,create_textureis called to actually perform the resize/creation.- See also
construct
- Methodset_image_data
voidset_image_data(Image.Image|mapping(string:mixed)data,bool|voidno_resize)- Description
Set the contents (and size) of the texture from the supplied data. The
datais identical to what would normally be sent as the last argument to glTex[Sub]Image2D() or an Image.Image object.If
no_resizeis specified, it is assumed that the data will fit in the texture, otherwise the parts that extend beyond it will be discarded.- Parameter
data Besides being an
Image.Imageobject,datacan be either of two types of mappins. First it can be a mapping with Image data."rgb":Image.ImageTexture image data.
"alpha":Image.ImageOptional alpha channel.
"luminance":Image.ImageOptional luminance channel.
Second it can be a mapping pointing out a shared memory segment.
"mem":System.MemoryThe shared memory segment.
"mem_w":intThe width and height of the memory segment.
"mem_h":int"mem_format":intThe format of the memory segment, e.g.
GL.GL_RGB."mem_type":intThe low level format of the memory segment, e.g.
GL.GL_UNSIGNED_BYTE.
Class GLUE.DynList
- Description
A displaylist that is generated on demand.
- Note
On Windows lists needs to be regenerated when the video driver mode is changed. Thus the DynList is to prefer over
List, since regeneration is done automatically upon video mode change.
- Methodcreate
GLUE.DynListGLUE.DynList(function(:void)|voidf)- Description
Create a new DynList object and optionally set a function that can generate the displaylist
- Parameter
f Function which contains the GL commands that generates the displaylist.
- Methodinit
voidinit()- Description
Generates the displaylist, ie calls the function set in
set_generator. Called only when the display list needs to be generated.
Class GLUE.Font
- Description
A font.
- Methodcreate
GLUE.FontGLUE.Font(Image.Fonts.Fontfont,float|voidscale_width,float|voidscale_spacing)
- Methodget_character
array(int|BaseTexture|Region) get_character(intc)- Description
Returns the advance (in pixels), the texture and the texture coordinates for the specified character, or 0 if it's nonprintable.
- Note
If the font->write call fails, the backtrace will be written to stderr.
- Methodtext_extents
array(float) text_extents(stringtext,floath)- Description
Get the width and height of the area that the string
textin sizehwould cover.
- Methodwrite
array(List|float) write(stringtext,floath,void|float|Regionroi,string|voidalign)- Description
Create a display list that writes text.
- Parameter
text The text to write.
- Parameter
h The font height
- Parameter
roi The region, if supplied, to restrict writing to.
- Parameter
align The text justification; "left" (default), "center" or "right".
- Methodwrite_now
array(float) write_now(stringtext,floath,void|float|Regionroi,string|voidalign)- Description
Write the
textin size [h], possibly restricted by regionroi. Return the width and height of the resulting text area. Ifroiis a float,Region(0.0, 0.0, roi, 10000.0)will be used.
Class GLUE.Font.Character
- Description
A character to draw.
- Methoddraw
voiddraw()- Description
Draw the character using the texture
txtwith the texture-coordinates indicated inpos, possible cropped withslice.
Class GLUE.Font.GAH
- Variableq
Variabletext
Variableh
Variableroi
Variablealign objectGLUE.Font.GAH.qstringGLUE.Font.GAH.textfloatGLUE.Font.GAH.hfloat|objectGLUE.Font.GAH.roistring|voidGLUE.Font.GAH.align
- Method__create__
protectedlocalvoid__create__(objectq,stringtext,floath,float|objectroi,string|voidalign)
- Variableq
Class GLUE.List
- Description
A display list abstraction. Automatically allocates a display list id upon creation and correctly deallocate it upon destruction.
- See also
DynList
- Method_destruct
protectedvoid_destruct()- Description
Deletes this list and frees the list id from the id pool.
- Method`>
boolres =GLUE.List()>x- Description
Listobjects can be sorted according to list id.- See also
get_id
- Methodbegin
voidbegin(bool|voidrun)- Description
Start defining the list. If
runis provided, the list will be executed as it is compiled (GL.GL_COMPILE_AND_EXECUTE).- See also
end,compile
- Methodcompile
voidcompile(function(:void)f)- Description
Compile a list be executing the list code
f. Exceptions infwill be thrown afterGL.glEndListhas been called.- See also
begin
- Methodcreate
GLUE.ListGLUE.List(void|function(:void)f)- Description
When creating a new list, the list code can be compiled upon creation by supplying a function
fthat performs the GL operations.- See also
call- Example
List list = List() { // GL code };
Class GLUE.RectangleDWIMTexture
- Description
Convenience version of the
RectangleTextureclass.
Class GLUE.RectangleTexture
- Description
Uses the NVidia RECT texture extension for non-power-of-two textures.
Class GLUE.Region
- Description
A rectangle. Used by the text routines to avoid drawing outside the current region.
- Variablex
Variabley
Variablew
Variableh floatGLUE.Region.xfloatGLUE.Region.yfloatGLUE.Region.wfloatGLUE.Region.h
- Method`&
Regionres =GLUE.Region()&R- Description
Creates a new region with the intersection of this region and
R.
Class GLUE.SquareMesh
- Description
A mesh of squares.
- Methodcreate
GLUE.SquareMeshGLUE.SquareMesh(function(float,float:Math.Matrix)calculator)- Description
The
calculatorwill be called for each corner and should return a 1x3 matrix describing the coordinates for the given spot om the surface.
- Methodset_lighting
voidset_lighting(booldo_lighting)- Description
Indicate whether or not lighting is used. If it is, the normals of each vertex will be calculated as well as the coordinates.
Class GLUE.Texture
- Description
Convenience version of the
Textureclass.
Module GLUE.Events
- Description
GLUE Event abstraction.
- ConstantBACKSPACE
ConstantDELETE
ConstantTAB
ConstantF1
ConstantF2
ConstantF3
ConstantF4
ConstantF5
ConstantF6
ConstantF7
ConstantF8
ConstantF9
ConstantF10
ConstantF11
ConstantF12
ConstantESCAPE
ConstantUP
ConstantDOWN
ConstantLEFT
ConstantRIGHT
ConstantPGUP
ConstantPGDWN
ConstantENTER
ConstantSPACE
ConstantHOME
ConstantEND
ConstantPAUSE
ConstantINSERT
ConstantSCROLL_LOCK
ConstantSYS_REQ
ConstantPRINT_SCRN
ConstantCAPSLOCK
ConstantMENU
ConstantNUMLOCK
ConstantA
ConstantB
ConstantC
ConstantD
ConstantE
ConstantF
ConstantG
ConstantH
ConstantI
ConstantJ
ConstantK
ConstantL
ConstantM
ConstantN
ConstantO
ConstantP
ConstantQ
ConstantR
ConstantS
ConstantT
ConstantU
ConstantV
ConstantW
ConstantX
ConstantY
ConstantZ constantintGLUE.Events.BACKSPACEconstantintGLUE.Events.DELETEconstantintGLUE.Events.TABconstantintGLUE.Events.F1constantGLUE.Events.F2constantGLUE.Events.F3constantGLUE.Events.F4constantGLUE.Events.F5constantGLUE.Events.F6constantGLUE.Events.F7constantGLUE.Events.F8constantGLUE.Events.F9constantGLUE.Events.F10constantGLUE.Events.F11constantGLUE.Events.F12constantintGLUE.Events.ESCAPEconstantintGLUE.Events.UPconstantintGLUE.Events.DOWNconstantintGLUE.Events.LEFTconstantintGLUE.Events.RIGHTconstantintGLUE.Events.PGUPconstantintGLUE.Events.PGDWNconstantintGLUE.Events.ENTERconstantintGLUE.Events.SPACEconstantintGLUE.Events.HOMEconstantintGLUE.Events.ENDconstantintGLUE.Events.PAUSEconstantintGLUE.Events.INSERTconstantintGLUE.Events.SCROLL_LOCKconstantintGLUE.Events.SYS_REQconstantintGLUE.Events.PRINT_SCRNconstantintGLUE.Events.CAPSLOCKconstantintGLUE.Events.MENUconstantintGLUE.Events.NUMLOCKconstantintGLUE.Events.AconstantintGLUE.Events.BconstantintGLUE.Events.CconstantintGLUE.Events.DconstantintGLUE.Events.EconstantintGLUE.Events.FconstantintGLUE.Events.GconstantintGLUE.Events.HconstantintGLUE.Events.IconstantintGLUE.Events.JconstantintGLUE.Events.KconstantintGLUE.Events.LconstantintGLUE.Events.MconstantintGLUE.Events.NconstantintGLUE.Events.OconstantintGLUE.Events.PconstantintGLUE.Events.QconstantintGLUE.Events.RconstantintGLUE.Events.SconstantintGLUE.Events.TconstantintGLUE.Events.UconstantintGLUE.Events.VconstantintGLUE.Events.WconstantintGLUE.Events.XconstantintGLUE.Events.YconstantintGLUE.Events.Z- Description
Numeric constant representing a key.
- ConstantBUTTON_1
ConstantBUTTON_2
ConstantBUTTON_3
ConstantBUTTON_4
ConstantBUTTON_5 constantintGLUE.Events.BUTTON_1constantintGLUE.Events.BUTTON_2constantintGLUE.Events.BUTTON_3constantintGLUE.Events.BUTTON_4constantintGLUE.Events.BUTTON_5- Description
Numeric constant representing a mouse button.
- ConstantKNOWN_MODIFIERS
constantGLUE.Events.KNOWN_MODIFIERS- Description
Integer constant with the union of all known modifiers, i.e.
_SHFTÂ |Â _CTRLÂ |Â _ALT.
- ConstantLSHIFT
ConstantRSHIFT
ConstantLCTRL
ConstantRCTRL
ConstantLALT
ConstantRALT constantintGLUE.Events.LSHIFTconstantintGLUE.Events.RSHIFTconstantintGLUE.Events.LCTRLconstantintGLUE.Events.RCTRLconstantintGLUE.Events.LALTconstantintGLUE.Events.RALT- Description
Numeric constant representing a modifier key.
- ConstantMODIFIERS
constantGLUE.Events.MODIFIERS- Description
Mapping that maps a modifier key to any of the symbolic modifiers
_SHFT,_CTRLand_ALT.
- ConstantMOUSE_UP
ConstantMOUSE_DOWN
ConstantMOUSE_LEFT
ConstantMOUSE_RIGHT
ConstantMOUSE_ABS constantintGLUE.Events.MOUSE_UPconstantintGLUE.Events.MOUSE_DOWNconstantintGLUE.Events.MOUSE_LEFTconstantintGLUE.Events.MOUSE_RIGHTconstantintGLUE.Events.MOUSE_ABS- Description
Numeric constant representing a mouse movement.
- Constantkey_names
constantGLUE.Events.key_names- Description
Mapping that maps key identifiers with a printable name, e.g.
LSHIFTto"Left shift".
- MethodALT
EventALT(int|EventX)array(Event) ALT(array(int|Event)X)- Description
Adds the
_ALTmodifier to anEvent, key or array of Events and/or keys.
- MethodCTRL
EventCTRL(int|EventX)array(Event) CTRL(array(int|Event)X)- Description
Adds the
_CTRLmodifier to anEvent, key or array of Events and/or keys.
- MethodSHFT
EventSHFT(int|EventX)array(Event) SHFT(array(int|Event)X)- Description
Adds the
_SHFTmodifier to anEvent, key or array of Events and/or keys.
- Methodis_modifier
boolis_modifier(intk)- Description
Returns
1if the key codekis a modifier key, e.g.LSHIFTorRSHIFT.
Class GLUE.Events.Event
- Description
Contains an event.
- Variablepressure
floatGLUE.Events.Event.pressure- Description
The pressure of the key stroke. A value between 0.0 and 1.0. Unknown values are represented as 0.
- Methodcreate
GLUE.Events.EventGLUE.Events.Event(int|void_key,bool|void_press,string|void_data,int|void_modifiers,float|voidpressure)
Module GLUT
Module GLSL
- Description
Low-level functions needed to do 'modern' OpenGL rendering.
You probably want to start by looking at the
GLSLUtilsmodule, or the examples included in the module.
- ConstantGL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING
constantGLSL.GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING
- MethodglBufferData
voidglBufferData(inttarget,System.Memorydata,intusage)voidglBufferData(inttarget,array(float)data,intusage)voidglBufferData(inttarget,intsize,intusage)
- MethodglBufferData
voidglBufferData(inttarget,intoffset,System.Memorydata)voidglBufferData(inttarget,intoffset,System.Memorydata,intdata_start,intdata_len)voidglBufferData(inttarget,intoffset,array(float)data)
- MethodglFramebufferRenderbufferEXT
voidglFramebufferRenderbufferEXT(intattachment,intrenderbuffer_object)
- MethodglFramebufferTexture2DEXT
voidglFramebufferTexture2DEXT(intattachment,inttype,inttexture,intmipmap)
- MethodglGetAttribLocation
MethodglVertexAttrib intglGetAttribLocation(intprogra,stringname)voidglVertexAttrib(intlocation,floatvalue)voidglVertexAttrib(intlocation,floatv1,floatv2)voidglVertexAttrib(intlocation,floatv1,floatv2,floatv3)voidglVertexAttrib(intlocation,floatv1,floatv2,floatv3,floatv4)
- MethodglMultiTexCoord
voidglMultiTexCoord(inttexture_unit,floatx)voidglMultiTexCoord(inttexture_unit,floatx,floaty)voidglMultiTexCoord(inttexture_unit,floatx,floaty,floatz)
- MethodglTexImage2DNoImage
intglTexImage2DNoImage(inttarget,intlevel,intinternal,intwidth,intheight,intborder,intformat,inttype)- Description
This is used by the framebuffer code on the pikelevel.
- MethodglVertexAttribPointer
voidglVertexAttribPointer(intindex,intsize,inttype,boolnormalize,intstride,System.Memorydata)
- MethodglVertexAttribPointer
voidglVertexAttribPointer(intindex,intsize,inttype,boolnormalize,intstride,intoffset)