CGAL 6.1 - Triangulated Surface Mesh Segmentation

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Surface_mesh_segmentation/sdf_values_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/mesh_segmentation.h>
#include <CGAL/property_map.h>
#include <iostream>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef boost::graph_traits<Polyhedron>::face_descriptor face_descriptor;
int main()
{
// create and read Polyhedron
Polyhedron mesh;
std::ifstream input(CGAL::data_file_path("meshes/cactus.off"));
if ( !input || !(input >> mesh) || mesh.empty() || ( !CGAL::is_triangle_mesh(mesh)) )
{
std::cerr << "Input is not a triangle mesh" << std::endl;
return EXIT_FAILURE;
}
// create a property-map
typedef std::map<face_descriptor, double> Face_double_map;
Face_double_map internal_map;
boost::associative_property_map<Face_double_map> sdf_property_map(internal_map);
// compute SDF values
std::pair<double, double> min_max_sdf = CGAL::sdf_values(mesh, sdf_property_map);
// It is possible to compute the raw SDF values and post-process them using
// the following lines:
// const std::size_t number_of_rays = 25; // cast 25 rays per face
// const double cone_angle = 2.0 / 3.0 * CGAL_PI; // set cone opening-angle
// CGAL::sdf_values(mesh, sdf_property_map, cone_angle, number_of_rays, false);
// std::pair<double, double> min_max_sdf =
// CGAL::sdf_values_postprocessing(mesh, sdf_property_map);
// print minimum & maximum SDF values
std::cout << "minimum SDF: " << min_max_sdf.first
<< " maximum SDF: " << min_max_sdf.second << std::endl;
// print SDF values
for(face_descriptor f : faces(mesh))
std::cout << sdf_property_map[f] << " ";
std::cout << std::endl;
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::is_triangle_mesh
bool is_triangle_mesh(const FaceGraph &g)
CGAL::sdf_values
std::pair< double, double > sdf_values(const TriangleMesh &triangle_mesh, SDFPropertyMap sdf_values_map, double cone_angle=2.0/3.0 *CGAL_PI, std::size_t number_of_rays=25, bool postprocess=true, PointPropertyMap ppmap=PointPropertyMap(), GeomTraits traits=GeomTraits())
Function computing the Shape Diameter Function over a surface mesh.
Definition: mesh_segmentation.h:96
Kernel