opengl中简单的画图程序，类似于绘图，有菜单可以选择绘制不同图形-opengl in the simple drawing program, similar to the drawings, there is the menu you can choose to draw different shapes

使用OPENGL绘制图形，可实现图形形状的转换，颜色模式的选择等-use opengl to paint a picture

用OpenGL做出的简易机器人模型，可以实现旋转等功能，鼠标右键可以创建一个菜单，根据提示选择需要的功能。-Simple to use OpenGL to make the robot model can rotate and other functions, the right mouse button to create a menu, follow the prompts to select the desired function.