def on_draw(self, gl=pyglet.gl):
		gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
		gl.glLoadIdentity()
		for renderer in self.renderers:
			renderer.draw()
Clear the current OpenGL context, reset the model/view matrix and
dataset/ETHPy150Open caseman/grease/grease/world.py/World.on_draw