107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Polyhedron_3.h>
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#include <CGAL/boost/graph/properties_Polyhedron_3.h>
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#include <CGAL/IO/Polyhedron_iostream.h>
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#include <CGAL/Surface_mesh.h>
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#include <CGAL/boost/graph/properties_Surface_mesh.h>
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#include <CGAL/Polygon_mesh_processing/measure.h>
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#include <iostream>
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#include <fstream>
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#include <iterator>
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#include <list>
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#include <boost/foreach.hpp>
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typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
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typedef K::Point_3 Point;
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typedef CGAL::Polyhedron_3<K> Polyhedron;
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typedef CGAL::Surface_mesh<Point> Surface_mesh;
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namespace PMP = CGAL::Polygon_mesh_processing;
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template<typename Mesh>
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void test(const Mesh& pmesh)
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{
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typedef boost::graph_traits<Mesh>::halfedge_descriptor halfedge_descriptor;
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typedef boost::graph_traits<Mesh>::face_descriptor face_descriptor;
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halfedge_descriptor border_he;
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BOOST_FOREACH(halfedge_descriptor h, halfedges(pmesh))
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{
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if (is_border(h, pmesh))
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{
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border_he = h;
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break;
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}
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}
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double border_l = PMP::border_length(border_he, pmesh);
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std::cout << "length of hole border = " << border_l << std::endl;
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std::list<face_descriptor> patch;
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BOOST_FOREACH(halfedge_descriptor h, halfedges(pmesh))
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{
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if (is_border(h, pmesh) || is_border(opposite(h, pmesh), pmesh))
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continue;
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else
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{
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patch.push_back(face(h, pmesh));
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patch.push_back(face(opposite(h, pmesh), pmesh));
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patch.push_back(face(opposite(next(h, pmesh), pmesh), pmesh));
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patch.push_back(face(opposite(prev(h, pmesh), pmesh), pmesh));
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break;
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}
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}
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double patch_area = PMP::area(patch, pmesh);
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std::cout << "patch area = " << patch_area << std::endl;
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}
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void test_polyhedron(const char* filename)
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{
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//run test for a Polyhedron
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Polyhedron poly; // file should contain oriented polyhedron
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std::ifstream input(filename);
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if (!input || !(input >> poly))
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{
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std::cerr << "Error: cannot read Polyhedron : " << filename << "\n";
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assert(!poly.empty());
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assert(false);
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return;
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}
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test(poly);
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}
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void test_surface_mesh(const char* filename)
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{
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Surface_mesh sm;
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std::ifstream input(filename);
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if (!input || !(input >> sm))
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{
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std::cerr << "Error: cannot read Surface mesh : " << filename << "\n";
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assert(sm.number_of_vertices() > 0);
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assert(false);
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return;
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}
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test(sm);
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}
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int main(int argc, char* argv[])
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{
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const char* filename = (argc > 1) ? argv[1] : "data/mech-holes-shark.off";
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test_polyhedron(filename);
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test_surface_mesh(filename);
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std::cerr << "All done." << std::endl;
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return 0;
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}
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