glMatrixIndexPointerOES
- define an array of matrix indices
void glMatrixIndexPointerOES(GLint size, GLenum type, GLsizei stride, const GLvoid * pointer)
size
Specifies the number of matrix indices per vertex. Must be is less than or equal to GL_MAX_VERTEX_UNITS_OES
. The initial value is 0
.
type
Specifies the data type of each matrix index in the array. Symbolic constant GL_UNSIGNED_BYTE
is accepted. The initial value is GL_UNSIGNED_BYTE
.
stride
Specifies the byte offset between consecutive matrix indices. If stride
is 0, the matrix indices are understood to be tightly packed in the array. The initial value is 0
.
pointer
Specifies a pointer to the first matrix index of the first vertex in the array. The initial value is 0
.
glMatrixIndexPointer
specifies the location and data of an array of matrix indices to use when rendering. size
specifies the number of matrix indices per vertex and type
the data type of the coordinates. stride
specifies the byte stride from one matrix 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.)
These matrices indices are used to blend corresponding matrices for a given vertex.
When a matrix index array is specified, size
, type
, stride
, and pointer
are saved as client-side state.
If the matrix index array is enabled, it is used when glDrawArrays
, or glDrawElements
is called. To enable and disable the vertex array, call glEnableClientState
and glDisableClientState
with the argument GL_MATRIX_INDEX_ARRAY_OES
. The matrix index array is initially disabled and isn't accessed when glDrawArrays
or glDrawElements
is called.
Use glDrawArrays
to construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays. Use glDrawElements
to construct a sequence of primitives by indexing vertices and vertex attributes.
glMatrixIndexPointer
is typically implemented on the client side.
GL_INVALID_VALUE
is generated if size
is greater than GL_MAX_VERTEX_UNITS_OES
.
GL_INVALID_ENUM
is generated if type
is is not an accepted value.
GL_INVALID_VALUE
is generated if stride
is negative.
Copyright © 2003-2004 Silicon Graphics, Inc.
This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.
glCurrentPaletteMatrix
, glDrawArrays
, glDrawElements
, glLoadPaletteFromModelViewMatrix
, glMatrixMode
, glWeightPointer
,