GLINDEXPOINTER(3G)GLINDEXPOINTER(3G)NAMEglIndexPointer - define an array of color indexes
C SPECIFICATION
void glIndexPointer( GLenum type,
GLsizei stride,
const GLvoid *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 ini‐
tial value is 0.
DESCRIPTIONglIndexPointer 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 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 argu‐
ment 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.
NOTESglIndexPointer 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 cor‐
responding 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,
glEdgeFlagPointer, glEnable, glGetPointerv, glInterleavedArrays,
glNormalPointer, glPopClientAttrib, glPushClientAttrib,
glTexCoordPointer, glVertexPointer
GLINDEXPOINTER(3G)
