peripheral trunks

The distinguishing feature of the new method is that a complex object can be decomposed to several convex parts of the body, Then, the periphery of projection for the convex part of the body is found.

该方法的特点是将复杂形体分解成若干个基本凸体，并将凸体的外围线框找出，同时将待消隐线段与外围线框求交，并用交点将待消隐线段分解成若干段，每一段采用视线交点法消隐原理测试其可见性，从而达到对待消隐线段消隐的目的。