CGAL 5.1 - Polygon Mesh Processing
Polygon_mesh_processing/orientation_pipeline_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/orientation.h>
#include <CGAL/Polygon_mesh_processing/polygon_soup_to_polygon_mesh.h>
#include <CGAL/Polygon_mesh_processing/orient_polygon_soup_extension.h>
#include <CGAL/algorithm.h>
#include <CGAL/Timer.h>
#include <fstream>
#include <algorithm>
#include <cstdlib>
int main(int argc, char** argv)
{
typedef K::Point_3 Point_3;
std::vector<Point_3> points;
std::vector< std::vector<std::size_t> > polygons;
Mesh ref1;
const char* input_filename = argc<2 ? "data/blobby-shuffled.off" : argv[1];
std::ifstream input(input_filename);
if ( !input){
std::cerr << "Error: can not read input file.\n";
return 1;
}
typedef K::Point_3 Point_3;
CGAL::File_scanner_OFF scanner(input);
points.resize(scanner.size_of_vertices());
polygons.resize(scanner.size_of_facets());
for (std::size_t i = 0; i < scanner.size_of_vertices(); ++i)
{
double x, y, z, w;
scanner.scan_vertex( x, y, z, w);
points[i] = Point_3(x, y, z, w);
scanner.skip_to_next_vertex( i);
}
for (std::size_t i = 0; i < scanner.size_of_facets(); ++i)
{
std::size_t no;
scanner.scan_facet( no, i);
polygons[i].resize(no);
for(std::size_t j = 0; j < no; ++j) {
std::size_t id;
scanner.scan_facet_vertex_index(id, i);
if(id < scanner.size_of_vertices())
{
polygons[i][j] = id;
}
else
{
std::cerr << "Error: input file not valid.\n";
return 1;
}
}
}
input.close();
if(points.size() == 0 || polygons.size()==0)
{
std::cerr << "Error: input file not valid.\n";
return 1;
}
const char* reference_filename = argc<2 ? "data/blobby.off" : argv[2];
input.open(reference_filename);
if ( !input || !(input >> ref1)){
std::cerr << "Error: can not read reference file.\n";
return 1;
}
input.close();
std::cout << "Is the soup a polygon mesh ? : "
<< std::endl;
CGAL::Polygon_mesh_processing::orient_triangle_soup_with_reference_triangle_mesh<CGAL::Sequential_tag>(ref1, points, polygons);
std::cout << "And now ? : "
<< std::endl;
std::cout << "And now ? : "
<< std::endl;
Mesh poly;
points, polygons, poly);
typedef boost::property_map<Mesh, CGAL::dynamic_face_property_t<std::size_t> >::type Fccmap;
Fccmap fccmap = get(CGAL::dynamic_face_property_t<std::size_t>(), poly);
connected_components(poly, fccmap)<<" CCs before merge."<<std::endl;
connected_components(poly, fccmap)<<" remaining CCs."<<std::endl;
return 0;
}