增加帧 meaning in Chinese

add frame

Using 4d coordinate to express the convert matrix of perspective , it is predigested to calculate z coordinate through changing to one . the coordinates of pixels in screen correspond with the z coordinate of object surface are modified by adding the numbers of buffer . the method of 3d perspective using directx buffer is improved
使用四维坐标来表示物体的透视变换矩阵，通过对该矩阵进行归一化处理，简化了z坐标的计算；通过增加帧缓冲区的数量，修正了物体表面z坐标在屏幕上对应点的坐标值，对利用directx的缓冲区进行物体三维透视的方法进行了改进，提高了透视精度。