3D视见变换（球、三角形），包括空间计算、空间转换、消隐、裁剪、投影，可完成绕轴旋转、平移等功能。并能对每步处理的多边形计数-3D Viewing Transformation (balls, triangle), including space, space conversion, blanking, cutting, projection, to be completed by around the axis rotation, translation and other functions