No comment. Sorry.

	initialize
	initialize reset

	shading
	processVertexBuffer:

	accessing	top
	addLight:
	material
	material:
	materialColor:
	needsLightUpdate
	needsLightUpdate:
	needsMaterialUpdate
	needsMaterialUpdate:
	popMaterial
	pushMaterial
	removeLight: Remove the light with the given index

	initialize	top
	initialize
	reset

	shading	top
	processVertexBuffer: Process the given vertex buffer in this part of the engine.

	testing	top
	isAvailable Return true if this part of the engine is available