本程序实习了openGL的茶壶(Teapot)；键盘C键控制其颜色；R键实现了旋转，同时X，Y，Z键可改变其旋转轴；方向键可控制光源位置；按着鼠标左键移动鼠标可以人工旋转，像Google Earth；按着鼠标右键移动向上移动鼠标壳缩小其尺寸，向下可放大-This program internship in openGL teapot (Teapot) keyboard C keys to control their color R key to achieving the rotation,

本程序用C++编写，实现了对各种点云数据的读取、显示（用OPENGL显示）、操作（用鼠标选取、放大、缩小、平移等）。-The the program C++ write, and read on a variety of point cloud data display (with OPENGL show), operation (selected with the mouse, zoom in, zoom out, pan, etc.).