OpenGL extension NV.texture_env_combine4
 
This module customises the behaviour of the 
OpenGL.raw.GL.NV.texture_env_combine4 to provide a more 
Python-friendly API
 
Overview (from the spec)
        
        New texture environment function COMBINE4_NV allows programmable
        texture combiner operations, including
        
            ADD                     Arg0 * Arg1 + Arg2 * Arg3
            ADD_SIGNED_EXT          Arg0 * Arg1 + Arg2 * Arg3 - 0.5
        
        where Arg0, Arg1, Arg2 and Arg3 are derived from
        
            ZERO                    the value 0
            PRIMARY_COLOR_EXT       primary color of incoming fragment
            TEXTURE                 texture color of corresponding texture unit
            CONSTANT_EXT            texture environment constant color
            PREVIOUS_EXT            result of previous texture environment; on
                                    texture unit 0, this maps to PRIMARY_COLOR_EXT
            TEXTURE<n>_ARB          texture color of the <n>th texture unit
        
        In addition, the result may be scaled by 1.0, 2.0 or 4.0.
 
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NV/texture_env_combine4.txt

Modules
		OpenGL.arrays OpenGL.constant OpenGL.constants ctypes OpenGL.extensions OpenGL.GL.glget OpenGL.platform OpenGL.wrapper

Data
		EXTENSION_NAME = 'GL_NV_texture_env_combine4' GL_COMBINE4_NV = GL_COMBINE4_NV GL_OPERAND3_ALPHA_NV = GL_OPERAND3_ALPHA_NV GL_OPERAND3_RGB_NV = GL_OPERAND3_RGB_NV GL_SOURCE3_ALPHA_NV = GL_SOURCE3_ALPHA_NV GL_SOURCE3_RGB_NV = GL_SOURCE3_RGB_NV __file__ = '/home/mcfletch/pylive/OpenGL/GL/NV/texture_env_combine4.pyc' __name__ = 'OpenGL.GL.NV.texture_env_combine4' __package__ = 'OpenGL.GL.NV'