opengl实现3d光晕仿真,我们将扩展glCamera类，来实现镜头光晕的效果-3d opengl implementation halo simulation, we will extend glCamera class that implements the lens flare effect

Qt中使用OpenGL进行2D绘图，包含QPainter and QGLWidget类的使用。-This example shows how QPainter and QGLWidget can be used together to display accelerated 2D graphics on supported hardware.

帮助学习opengl视角变换的程序，还有camera类的使用-Help learning program opengl perspective transformation, as well as the use of camera class