glIndexPointer man page on DigitalUNIX

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glIndexPointer(3G)					    glIndexPointer(3G)

       glIndexPointer - define an array of color indexes

       void glIndexPointer(
	       GLenum type,
	       GLsizei stride,
	       const GLvoid *pointer );

       Specifies the data type of each color index in the array. Symbolic con‐
       accepted.  The  initial	value  is GL_FLOAT.  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. The
       initial value is 0.  Specifies a pointer to  the	 first	index  in  the
       array. The initial value is 0.

       glIndexPointer()	 specifies  the location and data 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 allowing 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
       array,  call  glEnableClientState() and glDisableClientState() with the
       argument GL_INDEX_ARRAY. If enabled, the color index array is used when
       glDrawArrays(), 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
       glArrayElement()	 to specify primitives by indexing vertexes and vertex
       attributes and glDrawElements() to construct a sequence	of  primitives
       by indexing vertexes and vertex attributes.

       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
       corresponding  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 glPush‐
       ClientAttrib() and glPopClientAttrib() instead.

       GL_INVALID_ENUM is generated if type is not an accepted value.

       GL_INVALID_VALUE is generated if stride is negative.

       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

       glArrayElement(3),   glColorPointer(3),	 glDrawArrays(3),   glDrawEle‐
       ments(3), glEdgeFlagPointer(3), glEnable(3), glGetPointerv(3), glInter‐
       leavedArrays(3), glNormalPointer(3), glPopClientAttrib(3), glPushClien‐
       tAttrib(3), glTexCoordPointer(3), glVertexPointer(3)


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