OpenGL.GL.ARB.point_sprite

OpenGL extension ARB.point_sprite

This module customises the behaviour of the OpenGL.raw.GL.ARB.point_sprite to provide a more Python-friendly API

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://www.opengl.org/registry/specs/ARB/point_sprite.txt