实现纹理投影，能够通过键盘控制投影的方式，变化投影显示的物体，能进行键盘控制放大缩小，打开纹理显示和关闭纹理显示等，具体可见文件里边的功能列表截图-Realize texture projection, the projector can be controlled through the keyboard the way changes in the projection display of objects, the keyboard can control zoom, open the t