一个工程视图的消隐算法

Algorithm for removal of hidden lines from projective view

采用现有一些平面立体图形的消隐算法对工程视图消隐效率较低。从最终形成视图的像空间分析入手，提出一个首先对显示平面进行深度排序，按深度顺序，对各显示面进行多边形区域选取运算得到最终视图的算法；它的求交运算只与最终视图图形有关，包含性检验运算也极少，加快了消隐速度，适合于工程视图的消隐。

An algorithm for the removal of hidden lines from projective view is presented. The presented alogrithm removes hidden lines by sorting display planes according to their depth and selecting area operation of projective polygon. The intersecting calculation only depends on the last projective view. The inclusion test is seldom to be taken. Therefore the presented algorithm quickens the speed of hidden lines removal and is very adapted to the removal of hidden lines from projective view.