OpenGL.GL.EXT.texture_perturb_normal

OpenGL extension EXT.texture_perturb_normal

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

Overview (from the spec)

This extension defines a mechanism for using texture values to perturb the fragment normal vector prior to fragment lighting. It enables a direct implementation of the original formulation of bump mapping by Blinn.

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