通过OpenGL基本体素，例如三角形、三角形带、四边形、四边形带，它们都可以构成的球体。通过改变半径控制大小，通过改变角度的改变大小就可以改变顶点的数目和密度，通过在调用回调函数设置模式，就可以改变填充状态。通过调用函数来得到当前时间就可以得到一个功能要花费的时间。-Through the OpenGL primitives, such as triangle, triangle strip, quadrilateral, quadrilateral zone, which can constitute a sphere. Radius control by changing the size of the change by changing the angle can change the size and density of the number of vertices, by calling the callback function, set the mode, you can change the fill state. By calling the function to get the current time can be a function of the amount of time.