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- '''OpenGL extension ARB.point_sprite
-
- Overview (from the spec)
-
- Applications such as particle systems have tended to use OpenGL quads
- rather than points to render their geometry, since they would like
- to use a custom-drawn texture for each particle, rather than the
- traditional OpenGL round antialiased points, and each fragment in
- a point has the same texture coordinates as every other fragment.
-
- Unfortunately, specifying the geometry for these quads can be
- expensive, since it quadruples the amount of geometry required, and
- may also require the application to do extra processing to compute
- the location of each vertex.
-
- The purpose of this extension is to allow such applications to use
- points rather than quads. When GL_POINT_SPRITE_ARB is enabled,
- the state of point antialiasing is ignored. For each texture unit,
- the app can then specify whether to replace the existing texture
- coordinates with point sprite texture coordinates, which are
- interpolated across the point.
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/ARB/point_sprite.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_ARB_point_sprite'
- GL_POINT_SPRITE_ARB = constant.Constant( 'GL_POINT_SPRITE_ARB', 0x8861 )
- glget.addGLGetConstant( GL_POINT_SPRITE_ARB, (1,) )
- GL_COORD_REPLACE_ARB = constant.Constant( 'GL_COORD_REPLACE_ARB', 0x8862 )
-
-
- def glInitPointSpriteARB():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-