mirror of https://github.com/CGAL/cgal
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
#include <CGAL/Simple_cartesian.h>
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#include <CGAL/Surface_mesh.h>
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#include <CGAL/Heat_method_3/Surface_mesh_geodesic_distances_3.h>
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#include <iostream>
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#include <fstream>
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typedef CGAL::Simple_cartesian<double> Kernel;
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typedef Kernel::Point_3 Point_3;
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typedef CGAL::Surface_mesh<Point_3> Triangle_mesh;
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typedef boost::graph_traits<Triangle_mesh>::vertex_descriptor vertex_descriptor;
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typedef Triangle_mesh::Property_map<vertex_descriptor,double> Vertex_distance_map;
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int main(int argc, char* argv[])
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{
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const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/elephant.off");
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Triangle_mesh tm;
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if(!CGAL::IO::read_polygon_mesh(filename, tm) ||
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CGAL::is_empty(tm) || !CGAL::is_triangle_mesh(tm))
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{
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std::cerr << "Invalid input file." << std::endl;
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return EXIT_FAILURE;
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}
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//property map for the distance values to the source set
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Vertex_distance_map vertex_distance = tm.add_property_map<vertex_descriptor, double>("v:distance", 0).first;
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vertex_descriptor source = *(vertices(tm).first);
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CGAL::Heat_method_3::estimate_geodesic_distances(tm, vertex_distance, source) ;
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std::cout << "Source vertex " << source << " at: " << tm.point(source) << std::endl;
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for(vertex_descriptor vd : vertices(tm))
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{
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std::cout << vd << " ("<< tm.point(vd) << ")"
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<< " is at distance " << get(vertex_distance, vd) << std::endl;
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}
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return 0;
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}
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