一个简单的opengl程序，模拟一个太阳系，可以帮助理解模型视点变换，其中还用到了灯光，初学者可以一看！-A simple opengl program to simulate a solar system, can help understand the model of perspective transformation, which also use the lights, beginners can watch one!

一个封装好的opengl字体类，可以实现不受模型变换影响和受模型变换影响两类字体-a good opengl font type, model can be achieved without influence and transform transform affected by the model two fonts