mirror of https://github.com/CGAL/cgal
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include <CGAL/Surface_mesh.h>
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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Polygon_mesh_processing/compute_normal.h>
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#include <CGAL/Polygon_mesh_processing/extrude.h>
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#include <CGAL/IO/polygon_mesh_io.h>
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#include <iostream>
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#include <fstream>
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#include <string>
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typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
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typedef CGAL::Surface_mesh<Kernel::Point_3> Mesh;
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typedef boost::graph_traits<Mesh>::vertex_descriptor vertex_descriptor;
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typedef Kernel::Vector_3 Vector;
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typedef boost::property_map<Mesh, CGAL::vertex_point_t>::type VPMap;
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typedef Mesh::template Property_map<vertex_descriptor, Vector> VNMap;
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struct Bottom
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{
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Bottom(VPMap pmap, VNMap nmap, double vlen)
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: pmap(pmap), nmap(nmap), vlen(vlen)
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{}
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void operator()(const vertex_descriptor& vin, const vertex_descriptor vout) const
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{
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put(pmap, vout, get(pmap, vout) - vlen* get(nmap, vin));
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}
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VPMap pmap;
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VNMap nmap;
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double vlen;
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};
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struct Top
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{
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Top(VPMap pmap, VNMap nmap, double vlen)
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: pmap(pmap), nmap(nmap), vlen(vlen)
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{}
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void operator()(const vertex_descriptor& vin, const vertex_descriptor vout) const
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{
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put(pmap, vout, get(pmap, vout) + vlen* get(nmap, vin));
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}
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VPMap pmap;
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VNMap nmap;
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double vlen;
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};
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int main(int argc, char* argv[])
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{
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Mesh in, out;
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std::string filename = (argc > 1) ? std::string(argv[1]) : CGAL::data_file_path("meshes/cube-ouvert.off");
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double vlen = (argc > 2) ? std::stod(argv[2]) : 0.1;
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CGAL::IO::read_polygon_mesh(filename, in);
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VNMap vnormals = in.template add_property_map<vertex_descriptor, Vector>("v:normals", CGAL::NULL_VECTOR).first;
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CGAL::Polygon_mesh_processing::compute_vertex_normals(in, vnormals);
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Bottom bottom(get(CGAL::vertex_point,out), vnormals, vlen);
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Top top(get(CGAL::vertex_point,out), vnormals, vlen);
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CGAL::Polygon_mesh_processing::extrude_mesh(in, out, bottom, top);
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filename = filename.substr(filename.find_last_of("/") + 1, filename.length() - 1);
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filename = filename.substr(0, filename.find_last_of("."));
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filename = filename + "_" + std::to_string(vlen) + ".off";
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CGAL::IO::write_polygon_mesh(filename, out, CGAL::parameters::stream_precision(17));
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return 0;
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}
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