- Finished building glfw window.
- Finished ref and autorelease pool.
- Finished shaders' compiling, linking and processing.
- Finished image reading.
- Finished texture generating.
- Finished sprites' vao & vbos setup.
- Finished default ortho camera.
- Finished nodes' transform.
- Finished sprites' anchor point and content size.
- Finished visit nodes and nodes'addChild method.
- Finished local zorder.
- Finished sprites' opacity and color.
- Finished main scene.
- Finished rect.
- Mouse and keyboard events.
- BlendFunc.
- glStateBlock.
- Timer.
- Actions.
- Particles.
- Support OpenAL.