glIndexPointer(3G)glIndexPointer(3G)NAMEglIndexPointer - define an array of color indexes
SYNOPSIS
void glIndexPointer(
GLenum type,
GLsizei stride,
const GLvoid *pointer );
PARAMETERS
Specifies the data type of each color index in the array. Symbolic con‐
stants GL_UNSIGNED_BYTE, GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are
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.
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 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.
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
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.
ERRORS
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
ASSOCIATED GETSglIsEnabled() 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 ALSOglArrayElement(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)glIndexPointer(3G)