gamnit :: GamnitProgram :: vertex_shader
	# Vertex shader to attach to this program
	fun vertex_shader: VertexShader is abstract
					lib/gamnit/programs.nit:324,2--325,44
				
	redef var vertex_shader = new VertexShader(vertex_shader_source) is lazy
					lib/gamnit/programs.nit:501,2--73