def draw(self):
"""The OpenGL draw routine."""
# sys.stderr.write("Start GLUTContext.draw\n")
GL.glClearColor(self.background_color[0], self.background_color[1],
self.background_color[2], self.background_color[3])
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glEnable(GL.GL_DEPTH_TEST)
# sys.stderr.write("About to draw collections\n")
for collection in self.object_collections:
collection.draw()
err = GL.glGetError()
if err != GL.GL_NO_ERROR:
sys.stderr.write("Error {} drawing: {}\n".format(
err, gluErrorString(err)))
sys.exit(-1)
GLUT.glutSwapBuffers()
# sys.stderr.write("Done drawing collections.\n")
Rater.get().set()
# sys.stderr.write("End GLUTContext.draw\n")
self.framecount += 1
