用opengl实现小球与地面的碰撞，点击屏幕发射小球-Opengl achieve the collision with the ball and the ground, tap the screen launch ball

使用c-free软件编写opengl，实现在屏幕上点击可显示2D彩色正方形，squaresMouse，初学小白，实测可用。-C-free software is written using opengl, realized on screen, tap to display the 2D color squares, squaresMouse, novice white, found available.