GLINDEXPOINTER() GLINDEXPOINTER() NAME glIndexPointer - define an array of color indexes C SPECIFICATION void glIndexPointer( GLenum type, GLsizei stride, const GLvoid *pointer ) delim $$ PARAMETERS type Specifies the data type of each color index in the array. Sym- bolic constants GL_UNSIGNED_BYTE, GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are accepted. stride Specifies the byte offset between consecutive color indexes. If stride is 0 (the initial value), the color indexes are understood to be tightly packed in the array. pointer Specifies a pointer to the first index in the array. DESCRIPTION glIndexPointer specifies the location and data format of an array of color indexes to use when rendering. type specifies the data type of each color index and stride gives the byte stride from one color index to the next al- lowing vertexes and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see glInterleavedArrays.) type, stride, and pointer are saved as client-side state. The color index array is initially disabled. To enable and disable the ar- ray, call glEnableClientState and glDisableClientState with the argument GL_INDEX_ARRAY. If enabled, the color index array is used when glDrawAr- rays, glDrawElements or glArrayElement is called. Use glDrawArrays to construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays. Use glAr- rayElement to specify primitives by indexing vertexes and vertex attributes and glDrawElements to construct a sequence of primitives by indexing ver- texes and vertex attributes. NOTES glIndexPointer is available only if the GL version is 1.1 or greater. The color index array is initially disabled, and it isn't accessed when glArrayElement, glDrawElements or glDrawArrays is called. Execution of glIndexPointer is not allowed between glBegin and the corre- sponding glEnd, but an error may or may not be generated. If an error is not generated, the operation is undefined. glIndexPointer is typically implemented on the client side. Since the color index array parameters are client-side state, they are not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead. ERRORS GL_INVALID_ENUM is generated if type is not an accepted value. GL_INVALID_VALUE is generated if stride is negative. ASSOCIATED GETS glIsEnabled with argument GL_INDEX_ARRAY glGet with argument GL_INDEX_ARRAY_TYPE glGet with argument GL_INDEX_ARRAY_STRIDE glGetPointerv with argument GL_INDEX_ARRAY_POINTER SEE ALSO glArrayElement, glColorPointer, glDrawArrays, glDrawElements, glEdgeFlag- Pointer, glEnable, glGetPointerv, glInterleavedArrays, glNormalPointer, glPopClientAttrib, glPushClientAttrib, glTexCoordPointer, glVertexPointer GLINDEXPOINTER()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | ERRORS | ASSOCIATED GETS | SEE ALSO
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