select active texture unit
Signature
Parameters
| Variables | Description |
|---|---|
| texture |
Specifies which texture unit to make active. The number
of texture units is implementation dependent, but must be at least
two.
texture
must be one of
GL_TEXTURE
,
where
i ranges from 0 to the larger of (
GL_MAX_TEXTURE_COORDS
- 1)
and (
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
- 1).
The initial value is
GL_TEXTURE0
.
|
Description
glActiveTexture
selects which texture unit subsequent texture state calls will
affect. The number of texture units an implementation supports is
implementation dependent, but must be at least 2.
Vertex arrays are client-side GL resources, which are selected by the
glClientActiveTexture
routine.
Notes
glActiveTexture
is only supported if the GL version is 1.3 or greater, or if
ARB_multitexture
is included in the string returned by
glGetString
when called with the argument
GL_EXTENSIONS
.
Errors
GL_INVALID_ENUM
is generated if
texture
is not one of
GL_TEXTURE
,
where i ranges from 0 to the larger of (
GL_MAX_TEXTURE_COORDS
- 1)
and (
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
- 1).
Associated Gets
glGet
with argument
GL_ACTIVE_TEXTURE
,
GL_MAX_TEXTURE_COORDS
, or
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
See Also
Copyright
Copyright
1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/
.
Sample Code References
The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.
glActiveTexture