这是一个opengl实现在不同小视口中画线，三角形，多边形，圆形的例子，右键可以选择某个小视口单独显示，还可以用鼠标实现拖动，缩放等功能，是不错的入门参考程序。-This is an opengl implementation in different belittle the mouth and drawing lines, triangles, polygons, circles example, right can choose to display a belittling mouth alone can also be achieved with the mouse drag, zoom and other functions, is a good entry-reference program.