fglIndexPointer(3G) OpenGL Reference fglIndexPointer(3G)NAMEfglIndexPointer - define an array of color indexes
FORTRAN SPECIFICATION
SUBROUTINE fglIndexPointer( INTEGER*4 type,
INTEGER*4 stride,
CHARACTER*8 pointer )
PARAMETERS
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.
DESCRIPTIONfglIndexPointer 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 fglInterleavedArrays.)
type, stride, and pointer are saved as client-side state.
The color index array is initially disabled. To enable and disable the
array, call fglEnableClientState and fglDisableClientState with the
argument GL_INDEX_ARRAY. If enabled, the color index array is used when
fglDrawArrays, fglDrawElements or fglArrayElement is called.
Use fglDrawArrays to construct a sequence of primitives (all of the same
type) from prespecified vertex and vertex attribute arrays. Use
fglArrayElement to specify primitives by indexing vertices and vertex
attributes and fglDrawElements to construct a sequence of primitives by
indexing vertices and vertex attributes.
NOTESfglIndexPointer 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
fglArrayElement, fglDrawElements, or fglDrawArrays is called.
Page 1
fglIndexPointer(3G) OpenGL Reference fglIndexPointer(3G)
Execution of fglIndexPointer is not allowed between fglBegin and the
corresponding fglEnd, but an error may or may not be generated. If an
error is not generated, the operation is undefined.
fglIndexPointer is typically implemented on the client side.
Since the color index array parameters are client-side state, they are
not saved or restored by fglPushAttrib and fglPopAttrib. Use
fglPushClientAttrib and fglPopClientAttrib 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
fglIsEnabled with argument GL_INDEX_ARRAY
fglGet with argument GL_INDEX_ARRAY_TYPE
fglGet with argument GL_INDEX_ARRAY_STRIDE
fglGetPointerv 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 fglNewList and the corresponding call to fglEndList.
Instead, enable or disable before the call to fglNewList.
SEE ALSO
fglArrayElement, fglColorPointer, fglDrawArrays, fglDrawElements,
fglEdgeFlagPointer, fglEnable, fglGetPointerv, fglInterleavedArrays,
fglNormalPointer, fglPopClientAttrib, fglPushClientAttrib,
fglTexCoordPointer, fglVertexPointer
Page 2