Viewing file:  envmap_bumpmap.py (1.39 KB) -rw-r--r--
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'''OpenGL extension ATI.envmap_bumpmap
This module customises the behaviour of the
OpenGL.raw.GL.ATI.envmap_bumpmap to provide a more
Python-friendly API
Overview (from the spec)
This extension adds environment mapped bump mapping (EMBM) to the GL.
The method exposed by this extension is to use a dependent texture
read on a bumpmap (du,dv) texture to offset the texture coordinates
read into a map on another texture unit. This (du,dv) offset is also
rotated through a user-specified rotation matrix to get the texture
coordinates into the appropriate space.
A new texture format is introduced in order for specifying the (du,dv)
bumpmap texture. This map represents -1 <= du,dv <= 1 offsets to
be applied to the texture coordinates used to read into the base
map. Additionally, the (du,dv) offsets are transformed by a rotation
matrix that this extension allows the user to specify. Further, a
new color operation is added to EXT_texture_env_combine to specify
both that bumpmapping is enabled and which texture unit to apply
the bump offset to.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.txt
'''
from OpenGL import platform, constants, constant, arrays
from OpenGL import extensions, wrapper
from OpenGL.GL import glget
import ctypes
from OpenGL.raw.GL.ATI.envmap_bumpmap import *
### END AUTOGENERATED SECTION
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