vc实现一个风车，风车的颜色和位置都在随时间改变而改变-vc achieve a windmill, windmill and location of all the colors change over time change

opengl，四个扇叶的风车，键盘点R风车开始转动，放开R风车转动停止。-Opengl, four blades of the windmill, the keyboard point R windmill began to turn, let go of R windmills rotation stops.