摘要
针对大规模模型数据量庞大,难以实时显示的问题,为了压缩数据量,对已有的三角形折叠网格简化算法进行改进.该算法采用球面来拟合原始曲面,在球面上选取新的顶点,并引入局部区域面积度量参数作为三角形的权值来确定三角形的折叠次序,能够在简化程度较高的情况下很好保持原始模型的几何特征、拓扑结构和边界特性.实验表明,该算法是有效的,能有效逼真原始模型.
In order to solve the problem of large amount of data and difficult real-time display of the large-scale model,the existed mesh simplification algorithm of the triangle collapse is improved to compress the data.In the algorithm,the spherical surface is used to fit the original curved surface so as to locate a new vertex,and the local region area measure is introduced into the collapse cost computation to change the sequence of triangle collapse.This algorithm can keep the geometrical cheracteristic,topological structure and boundary characteristic of original model effectively when it greatly simplifies the model.Experiments show that it preserves the key features of the original model in simplified model and is effective.
出处
《兰州交通大学学报》
CAS
2011年第6期45-49,共5页
Journal of Lanzhou Jiaotong University
关键词
三角形折叠
网格简化
球面近似
局部区域面积
triangle collapse
mesh simplification
spherical surface estimation
local region area
