实现对三维人脸的读取，放大，缩小，可以根据鼠标的拖动来旋转。内部包含一个标准的三维人脸，对三维学习来说，非常好的代码学习材料，是我们实验室的作品。-Implementation of three-dimensional human face to read, enlarge, reduce, can drag the mouse to rotate. Interior includes a standard three-dimensional face, three-dimensional le