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- '''OpenGL extension NV.texgen_emboss
-
- Overview (from the spec)
-
- This extension provides a new texture coordinate generation mode
- suitable for multitexture-based embossing (or bump mapping) effects.
-
- Given two texture units, this extension generates the texture
- coordinates of a second texture unit (an odd-numbered texture unit)
- as a perturbation of a first texture unit (an even-numbered texture
- unit one less than the second texture unit). The perturbation is
- based on the normal, tangent, and light vectors. The normal vector
- is supplied by glNormal; the light vector is supplied as a direction
- vector to a specified OpenGL light's position; and the tanget
- vector is supplied by the second texture unit's current texture
- coordinate. The perturbation is also scaled by program-supplied
- scaling constants.
-
- If both texture units are bound to the same texture representing a
- height field, by subtracting the difference between the resulting two
- filtered texels, programs can achieve a per-pixel embossing effect.
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/NV/texgen_emboss.txt
-
- Automatically generated by the get_gl_extensions script, do not edit!
- '''
- from OpenGL import platform, constants, constant, arrays
- from OpenGL import extensions
- from OpenGL.GL import glget
- import ctypes
- EXTENSION_NAME = 'GL_NV_texgen_emboss'
- GL_EMBOSS_LIGHT_NV = constant.Constant( 'GL_EMBOSS_LIGHT_NV', 0x855D )
- GL_EMBOSS_CONSTANT_NV = constant.Constant( 'GL_EMBOSS_CONSTANT_NV', 0x855E )
- GL_EMBOSS_MAP_NV = constant.Constant( 'GL_EMBOSS_MAP_NV', 0x855F )
-
-
- def glInitTexgenEmbossNV():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-