一种简易的曲面隐藏线消去法

本文介绍一种简易的曲面隐藏线消去法。先将曲面上各网点分成可见与不可见两类,然后根据线与线相关性,判断各网格线段的可见性,最后只显示或绘制所有的可见网格线段,得到消隐后的曲面立体图形,本法比较简易,调用方便,通用性较强,不管曲面是根据什么方法构作的,只要顺序输入两个方向的网点数及所有网点的坐标值,调用本子程序,一般均能进行曲面消隐。

A Simple Algorithm for Removing Hidden Grid Lines on Surfaces

Presented in this paper is a simple and easy method for removing hidden lines on a curved surface. First,the grid nodes on the surface are divided into two groups, visible and invisible,then judgement is made for the visibility of the grid lines on the surface according to the coherence of the lines. All the visible lines are then displayed or drawn to get the axonometric projections of the curved surface. This method Is rather simple, convenient to be called in and less restricted. The only input needed is the grid node numbers in two directions and the coordinates of all the grid nodes regardless of the construction of the curved surface.