基于OpenGL的二维小狗动画，可以通过鼠标改变小狗跑，走，跳，静止的运动状态，可以使小狗发出声音，可以改变小狗颜色。(About OpenGL two-dimensional puppy animation, you can realize the puppy's running, walking, jumping, and still moving state. It can make a sound and change the puppy's color.)