nehe opengl源程序，第二课，介绍简单的opengl绘图功能-code of nehe s lesson 2

Qt中使用OpenGL进行2D绘图，包含QPainter and QGLWidget类的使用。-This example shows how QPainter and QGLWidget can be used together to display accelerated 2D graphics on supported hardware.

vc++中基于opengl绘图，控制台程序中绘制出立方体，并可使用鼠标对其移动操作-Based on vc++ opengl graphics, mapped the cube in the console program, and can use the mouse to its mobile operation