本文提出并实现一种用于三维坐标拣选的RIP（Ray-Intersection-Penetration）方法。介绍了如何在已经渲染至窗口的三维场景中，使用鼠标或者相关设备拣选特定三维对象的方法。此方法对于正交投影或透视投影均有效，相对于OpenGL自带的选择与反馈机制，本方法无论是拣选精度还是算法实现效率均高出许多，是一种比较通用的解决方案。-this paper, and for the realization of a three-dimensional coordinates of the selected RIP (Ray-Intersecti on-penetration) method. Described how the window had been exaggerated to the three-dimensional scenes. use a mouse or related equipment selection of specific three-dimensional object methods. This method for the orthogonal projection or perspective projection is effective, relative to OpenGL to bring their own choices and feedback mechanisms, Whether this method is to select the algorithm accuracy or much higher efficiency is a more generic solution.