CGAL 6.2 - Boolean Operations on Meshes

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PMP_Boolean_operations/corefinement_mesh_non_manifold_intersection.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/corefinement.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <iostream>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Surface_mesh<K::Point_3> Mesh;
namespace PMP = CGAL::Polygon_mesh_processing;
int main(int argc, char* argv[])
{
const std::string filename1 = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/blobby.off");
const std::string filename2 = (argc > 2) ? argv[2] : CGAL::data_file_path("meshes/eight.off");
Mesh mesh1, mesh2;
if(!PMP::IO::read_polygon_mesh(filename1, mesh1) || !PMP::IO::read_polygon_mesh(filename2, mesh2))
{
std::cerr << "Invalid input." << std::endl;
return 1;
}
PMP::Corefinement::Non_manifold_output_visitor<Mesh> visitor(mesh1, mesh2);
Mesh out;
bool valid_inter = PMP::corefine_and_compute_intersection(mesh1, mesh2, out, CGAL::parameters::visitor(visitor));
if(valid_inter)
{
std::cout << "Intersection was successfully computed as a manifold mesh\n";
CGAL::IO::write_polygon_mesh("inter.off", out, CGAL::parameters::stream_precision(17));
}
else
{
std::cout << "Intersection was successfully computed but is non-manifold, exporting a triangle soup\n";
std::vector<K::Point_3> points;
std::vector< std::array<std::size_t, 3> > polygons;
visitor.extract_intersection(points, polygons);
CGAL::IO::write_polygon_soup("inter_soup.off", points, polygons, CGAL::parameters::stream_precision(17));
// make the soup topologically manifold (but geometrically self-intersecting)
PMP::orient_polygon_soup(points, polygons);
// fill a mesh with the intersection
PMP::polygon_soup_to_polygon_mesh(points, polygons, out);
CGAL::IO::write_polygon_mesh("inter.off", out, CGAL::parameters::stream_precision(17));
}
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Surface_mesh
CGAL::IO::write_polygon_soup
bool write_polygon_soup(const std::string &fname, const PointRange &points, const PolygonRange &polygons, const NamedParameters &np=parameters::default_values())
CGAL::Polygon_mesh_processing::corefine_and_compute_intersection
bool corefine_and_compute_intersection(TriangleMesh &tm1, TriangleMesh &tm2, TriangleMesh &tm_out, const NamedParameters1 &np1=parameters::default_values(), const NamedParameters2 &np2=parameters::default_values(), const NamedParametersOut &np_out=parameters::default_values())
corefines tm1 and tm2 and puts in tm_out a triangulated surface mesh bounding the intersection of t...
Definition: corefinement.h:637
CGAL::Polygon_mesh_processing::polygon_soup_to_polygon_mesh
void polygon_soup_to_polygon_mesh(const PointRange &points, const PolygonRange &polygons, PolygonMesh &out, const NamedParameters_PS &np_ps=parameters::default_values(), const NamedParameters_PM &np_pm=parameters::default_values())
CGAL::Polygon_mesh_processing::orient_polygon_soup
bool orient_polygon_soup(PointRange &points, PolygonRange &polygons, const NamedParameters &np=parameters::default_values())
CGAL::IO::write_polygon_mesh
bool write_polygon_mesh(const std::string &fname, Graph &g, const NamedParameters &np=parameters::default_values())