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fglIndexPointerEXT(3G)	       OpenGL Reference		fglIndexPointerEXT(3G)

NAME
     fglIndexPointerEXT - define an array of color indexes

FORTRAN SPECIFICATION
     SUBROUTINE fglIndexPointerEXT( INTEGER*4 type,
				    INTEGER*4 stride,
				    INTEGER*4 count,
				    CHARACTER*8 pointer )

PARAMETERS
     type     Specifies the data type of each color index in the array.
	      Symbolic constants GL_SHORT, GL_INT, GL_FLOAT, or GL_DOUBLE_EXT,
	      are accepted.

     stride   Specifies the byte offset between consecutive color indexes.  If
	      stride is zero the color indexes are understood to be tightly
	      packed in the array.

     count    Specifies the number of indexes, counting from the first, that
	      are static.

     pointer  Specifies a pointer to the first index in the array.

DESCRIPTION
     fglIndexPointerEXT specifies the location and data format of an array of
     color indexes to use when rendering using the vertex array extension.
     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.)
     count indicates the number of array elements (counting from the first)
     that are static. Static elements may be modified by the application, but
     once they are modified, the application must explicitly respecify the
     array before using it for any rendering. When a color index array is
     specified, type, stride, count and pointer are saved as client-side
     state, and static array elements may be cached by the implementation.

     The color index array is enabled and disabled using fglEnable and
     fglDisable with the argument GL_INDEX_ARRAY_EXT. If enabled, the color
     index array is used when fglDrawArraysEXT or fglArrayElementEXT is
     called.

     Use fglDrawArraysEXT to define a sequence of primitives (all of the same
     type) from pre-specified vertex and vertex attribute arrays.  Use
     fglArrayElementEXT to specify primitives by indexing vertices and vertex
     attributes.

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fglIndexPointerEXT(3G)	       OpenGL Reference		fglIndexPointerEXT(3G)

NOTES
     Non-static array elements are not accessed until fglArrayElementEXT or
     fglDrawArraysEXT is executed.

     By default the color index array is disabled and it won't be accessed
     when fglArrayElementEXT or fglDrawArraysEXT is called.

     Although it is not an error to call fglIndexPointerEXT between the
     execution of fglBegin and the corresponding execution of fglEnd, the
     results are undefined.

     fglIndexPointerEXT will typically be implemented on the client side with
     no protocol.

     Since the color index array parameters are client side state, they are
     not saved or restored by fglPushAttrib and fglPopAttrib.

     fglIndexPointerEXT commands are not entered into display lists.

     fglIndexPointerEXT is part of the EXT_vertex_array extension, not part of
     the core GL command set. If GL_EXT_vertex_array is included in the string
     returned by fglGetString, when called with argument GL_EXTENSIONS,
     extension EXT_vertex_array is supported.

ERRORS
     GL_INVALID_ENUM is generated if type is not an accepted value.

     GL_INVALID_VALUE is generated if stride or count is negative.

ASSOCIATED GETS
     fglIsEnabled with argument GL_INDEX_ARRAY_EXT
     fglGet with argument GL_INDEX_ARRAY_SIZE_EXT
     fglGet with argument GL_INDEX_ARRAY_TYPE_EXT
     fglGet with argument GL_INDEX_ARRAY_STRIDE_EXT
     fglGet with argument GL_INDEX_ARRAY_COUNT_EXT
     fglGetPointervEXT with argument GL_INDEX_ARRAY_POINTER_EXT

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 fglNewList and the corresponding call to fglEndList.

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fglIndexPointerEXT(3G)	       OpenGL Reference		fglIndexPointerEXT(3G)

     Instead, enable or disable before the call to fglNewList.

SEE ALSO
     fglArrayElementEXT, fglColorPointerEXT, fglDrawArraysEXT,
     fglEdgeFlagPointerEXT, fglEnable, fglGetPointervEXT, fglNormalPointerEXT,
     fglTexCoordPointerEXT, fglVertexPointerEXT

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