演示验证了OpenGL与vb结合实现三维结构网格的绘制，网格云图的绘制。鼠标基本交互，包括旋转、平移、缩放，不同视角视图的设置，坐标系绘制，光照，shade的绘制等内容。-Demonstration of the combination of OpenGL and vb to achieve three-dimensional structure of the grid rendering, rendering the grid cloud. Mouse basic interaction, i