OpenGL.GL.SGIX.shadow

OpenGL extension SGIX.shadow

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

Overview (from the spec)

This extension defines two new operations to be performed on texture values before they are passed on to the filtering subsystem. These operations perform either a <= or >= test on the value from texture memory and the iterated R value, and return 1.0 or 0.0 if the test passes or fails, respectively.

The official definition of this extension is available here: http://www.opengl.org/registry/specs/SGIX/shadow.txt