图形学消隐实验，*方案1上下旋转，只显示可见面，函数说明：void Project(float X,float Y,float Z)

功能：根据透视或平行投影将三维点进行投影变换

入口参数：float X,float Y,float Z

返回参数：无（void）-graphics blanking experiment, * a program next rotation, only to be met, function : void Project (float X, Y float, float Z) functions : According to the projection lens or parallel to the projection of 3D points transform entrance parameters : float X, Y float. float Z return parameters : None (void)