glWeightPointerOES
- define an array of weights
void glWeightPointerOES(GLint size, GLenum type, GLsizei stride, const GLvoid * pointer)
size
Specifies the number of weights 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 weight in the array. Symbolic constant GL_FIXED
is accepted. However, the common profile also accepts the symbolic constant GL_FLOAT
as well. The initial value is GL_FIXED
for the common lite profile, or GL_FLOAT
for the common profile.
stride
Specifies the byte offset between consecutive weights. If stride
is 0, the weights are understood to be tightly packed in the array. The initial value is 0.
pointer
Specifies a pointer to the first weight of the first vertex in the array. The initial value is 0.
glWeightPointer
specifies the location and data of an array of weights to use when rendering. size
specifies the number of weights per vertex and type
the data type of the coordinates. stride
specifies the byte stride from one weight 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 weights are used to blend corresponding matrices for a given vertex.
When a weight array is specified, size
, type
, stride
, and pointer
are saved as client-side state.
If the weight 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_WEIGHT_ARRAY_OES
. The weight 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.
glWeightPointer
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
, glMatrixIndexPointer
, glMatrixMode
,