立体透视变换矩阵中 P.Q.R 的透视几何意义

The Perspective Geometry Meaning of P.Q.R in Three-Dimensional Perspective Matrix

在计算机绘图中的立体透视变换矩阵中经常使用透视变换参数Ｐ．Ｑ．Ｒ，它们取值直接影响体的透视效果。本文对Ｐ．Ｑ．Ｒ的透视几何意义进行了分析证明，这对在选择Ｐ．Ｑ．Ｒ来绘制透视图时有一定的帮助。

The perspective parameters P.Q.R are very often used in the matrix of perspective transformation in the Computer Graphics. Their values have direct effect on three-dimensional perspect. The paper analyises and proves the perspective geometry meaning of the P.Q.R.