glIndexPointer(3G)	       OpenGL Reference		    glIndexPointer(3G)

NAME    [Toc]    [Back]

     glIndexPointer - define an	array of color indexes

C SPECIFICATION    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

     type     Specifies	the data type of each color index in the array.
	      Symbolic constants GL_UNSIGNED_BYTE, GL_SHORT, GL_INT, GL_FLOAT,
	      and GL_DOUBLE are	accepted. The initial value is GL_FLOAT.

     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.  The initial value
	      is 0.

     pointer  Specifies	a pointer to the first index in	the array.  The
	      initial value is 0.

DESCRIPTION    [Toc]    [Back]

     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 allowing vertices	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 vertices and vertex
     attributes	and glDrawElements to construct	a sequence of primitives by
     indexing vertices and vertex attributes.

NOTES    [Toc]    [Back]

     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.






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glIndexPointer(3G)	       OpenGL Reference		    glIndexPointer(3G)



     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
     glPushClientAttrib	and glPopClientAttrib instead.

ERRORS    [Toc]    [Back]

     GL_INVALID_ENUM is	generated if type is not an accepted value.

     GL_INVALID_VALUE is generated if stride is	negative.

ASSOCIATED GETS    [Toc]    [Back]

     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


MACHINE	DEPENDENCIES
     On	RealityEngine, RealityEngine2, and VTX systems,	do not enable or
     disable GL_VERTEX_ARRAY, GL_VERTEX_ARRAY_EXT, GL_NORMAL_ARRAY,
     GL_NORMAL_ARRAY_EXT, GL_COLOR_ARRAY, GL_COLOR_ARRAY_EXT,
     GL_INDEX_ARRAY,GL_INDEX_ARRAY_EXT,	GL_TEXTURE_COORD_ARRAY,
     GL_TEXTURE_COORD_ARRAY_EXT, GL_EDGE_FLAG_ARRAY or GL_EDGE_FLAG_ARRAY_EXT
     between a call to glNewList and the corresponding call to glEndList.
     Instead, enable or	disable	before the call	to glNewList.

SEE ALSO    [Toc]    [Back]

     glArrayElement, glColorPointer, glDrawArrays, glDrawElements,
     glEdgeFlagPointer,	glEnable, glGetPointerv, glInterleavedArrays,
     glNormalPointer, glPopClientAttrib, glPushClientAttrib,
     glTexCoordPointer,	glVertexPointer


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