关键词: 三角网格模型, 离散曲率, 网格分割

Abstract:

Aiming at the problems of high computational complexity and unsatisfactory for fast segmentation of triangular mesh model blocks in Web environment, a simple and efficient triangular mesh model segmentation method for Web environment is proposed. Firstly, the concave region of the mesh model is divided according to the characteristics of Gauss curvature and mean curvature. Then, the concave feature region is extracted according to the minimum negative curvature threshold in the concave region. Combined with the method of extracting the central feature line of the region and the algorithm of closing and optimizing the boundary line, a closed segmentation line is constructed to segment the triangular mesh model. Relying on the open source digital geometry processing software MeshLabJS and using the geometry processing and graphics rendering functions of WebGL, the algorithm is tested on Princeton standard data set and COSEG shape data set. The results show that the proposed method can segment three-dimensional models quickly, efficiently and meaningfully in the Web environment.

Key words: triangular mesh model, discrete curvature, mesh segmentation