| | '''OpenGL extension EXT.light_texture |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.EXT.light_texture to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension defines a general mechanism for substituting the |
| | fragment color computed during texture environment processing in |
| | place of other fragment attributes such as the fragment normal, or |
| | as sources for some of the computations in the fragment processing |
| | pipeline, for example as material or light parameters in the |
| | fragment lighting computations. |
| | |
| | |
| | Cf ----------------------+ |
| | | +-> to lighting parameters |
| | v | |
| | +------------+ +--------+ +-------------+ |
| | | | | | | | |
| | | texel |------->| texenv |-----| texture |---> Cf' (to Light Environment |
| | | generation | | | | application | or Fog) |
| | | | | | | | |
| | +------------+ +--------+ +-------------+ |
| | |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/EXT/light_texture.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GL import _types, _glgets |
| | from OpenGL.raw.GL.EXT.light_texture import * |
| | from OpenGL.raw.GL.EXT.light_texture import _EXTENSION_NAME |
| |
|
| | def glInitLightTextureEXT(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| |
|
| | |
