Hole Boundary Identification Algorithm for 3D Closed Triangle Mesh
Qingxi Hu · Jisuanji gongcheng · 2010
An entity hole boundary identification algorithm for 3D closed triangle mesh hole is presented in this paper.The area sounding the hole is selected by a smoothed curve which is dragged by the mouse.By using the dot product between the triangle normal and the viewing direction,the model silhouettes,and a continuous hole silhouette can be obtained.The 3D hole boundaries of the inner surface and the outer surface can be searched according to the curve point set and the hole silhouette.This whole flow is used to simplify the interactive operation for the identification of hole boundaries on the model which is a 2-manifold,oriented,closed and non-simple connected triangle mesh,which can improve the convenience for design system.