本文介绍了使用CGAL简化组合图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想使用CGAL简化或边缘折叠从.off文件读取的网格作为组合图
I want to simplify or edge collapse a mesh read from .off file as a combinatorial map using CGAL
std::ifstream ifile(fileName.toStdString().c_str());
if (ifile)
{
CGAL::load_off(lcc, ifile);
lcc.display_characteristics(std::cout)<<", is_valid="<<CGAL::is_valid(lcc)<<std::endl;
}
namespace SMS = CGAL::Surface_mesh_simplification ;
SMS::Count_stop_predicate<LCC> stop(lcc.number_of_halfedges()/2 - 1);
int r = SMS::edge_collapse
(lcc
,stop
,CGAL::parameters::halfedge_index_map(get(CGAL::halfedge_index, lcc))
.vertex_index_map(get(boost::vertex_index, lcc))
.get_cost(SMS::Edge_length_cost<LCC>())
.get_placement(SMS::Midpoint_placement<LCC>())
);
std::cout << "\nFinished...\n" << r << " edges removed.\n"
<< (lcc.number_of_darts()/2) << " final edges.\n" ;
lcc.display_characteristics(std::cout)<<", is_valid="<<CGAL::is_valid(lcc)<<std::endl;
输出:
#Darts=16674, #0-cells=2775, #1-cells=8337, #2-cells=5558, #ccs=1, is_valid=1
Finished...
0 edges removed.
8337 final edges.
#Darts=16674, #0-cells=2775, #1-cells=8337, #2-cells=5558, #ccs=1, is_valid=1
该方法无济于事,我尝试了多个.off文件,它可以正确预览,但不能简化它
,我感谢您的帮助。
the method do nothing , I tried more than .off file and it's preview it properly but it cannot simplify it I appreciate any help .
推荐答案
请参见给出的示例,它运行良好。
See the example given here, it works perfectly.
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