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#include <CGAL/Gmpq.h>
#include <CGAL/Lazy_exact_nt.h>
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Bounded_kernel.h>
#include <CGAL/Nef_polyhedron_2.h>
#include <CGAL/Extended_cartesian.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
typedef CGAL::Lazy_exact_nt<CGAL::Gmpq> FT;
typedef CGAL::Simple_cartesian<FT> Kernel;
typedef CGAL::Bounded_kernel<Kernel> Extended_kernel;
// typedef CGAL::Exact_predicates_inexact_constructions_kernel MyKernel;
// typedef CGAL::Bounded_kernel<CGAL::Extended_cartesian<CGAL::Gmpq> > MyKernel;
typedef CGAL::Extended_cartesian<CGAL::Gmpq> MyKernel;
typedef CGAL::Nef_polyhedron_2<MyKernel> Nef_polyhedron;
typedef Nef_polyhedron::Point Point;
typedef Nef_polyhedron::Explorer Explorer;
typedef Explorer::Vertex_const_iterator Vertex_const_iterator;
typedef Explorer::Face_const_iterator Face_const_iterator;
typedef Explorer::Hole_const_iterator Hole_const_iterator;
typedef Explorer::Halfedge_around_face_const_circulator Halfedge_around_face_const_circulator;
typedef Explorer::Vertex_const_handle Vertex_const_handle;
typedef Explorer::Vertex_handle Vertex_handle;
typedef Explorer::Halfedge_const_handle Halfedge_const_handle;
void print(const Nef_polyhedron &RST)
{
// CGAL::set_pretty_mode(std::cout);
// std::cout << RST << std::endl;
Explorer explorer = RST.explorer();
explorer.print_statistics();
CGAL::Object_index<Vertex_const_handle> VI(explorer.vertices_begin(), explorer.vertices_end(), 'v');
for (Vertex_const_iterator vit = explorer.vertices_begin(); vit!=explorer.vertices_end(); ++vit) {
std::cout << VI(vit, true);
if (explorer.is_standard(vit)) std::cout << " [ " << to_double(explorer.point(vit).x()) << ", " << to_double(explorer.point(vit).y()) << " ]";
std::cout << "\n";
}
for (Face_const_iterator fit = explorer.faces_begin();
fit != explorer.faces_end();
fit++) {
std::cout << "explorer.mark(explorer.faces_begin()) " << ((explorer.mark(fit))? "is part of polygon" : "is not part of polygon") << std::endl;
if (fit->halfedge() == Halfedge_const_handle()) std::cout << "X\n";
else {
Halfedge_around_face_const_circulator hafc = explorer.face_cycle(fit), done(hafc);
do {
Vertex_const_handle vh = explorer.target(hafc);
std::cout << VI(vh, true) << " ";
if (explorer.is_standard(vh)) std::cout << "[" << to_double(explorer.point(vh).x()) << ", " << to_double(explorer.point(vh).y()) << "], " ;
hafc++;
} while(hafc != done);
std::cout << std::endl;
}
if (fit->fc_begin() == fit->fc_end()) {
std::cout << "Y\n";
}
else {
for (Hole_const_iterator hit = explorer.holes_begin(fit); hit != explorer.holes_end(fit); hit++){
std::cout << "Hole: ";
Halfedge_around_face_const_circulator hafc(hit), done(hit);
do{
Vertex_const_handle vh = explorer.target(hafc);
std::cout << VI(vh, true) << " ";
if (explorer.is_standard(vh)) std::cout << "[" << to_double(explorer.point(vh).x()) << ", " << to_double(explorer.point(vh).y()) << "], " ;
hafc++;
}while(hafc != done);
std::cout << std::endl;
}
}
}
}
int main()
{
Point tris[15] = {
Point(45,100), Point(45,50), Point(60,80),
Point(140,0), Point(45,50), Point(0,0),
Point(0,140), Point(0,0), Point(50,140),
Point(45,100), Point(50,140), Point(0,0),
Point(45,100), Point(0,0), Point(45,50),
};
std::list<std::pair<Point*,Point*> > polylines;
polylines.push_back(std::make_pair(tris+0, tris+3));
polylines.push_back(std::make_pair(tris+3, tris+6));
polylines.push_back(std::make_pair(tris+6, tris+9));
polylines.push_back(std::make_pair(tris+9, tris+12));
polylines.push_back(std::make_pair(tris+12, tris+15));
Nef_polyhedron RST(polylines.begin(), polylines.end(), Nef_polyhedron::POLYGONS);
print(RST);
Nef_polyhedron N;
for (std::list<std::pair<Point*,Point*> >::const_iterator iter = polylines.begin();
iter != polylines.end();
iter++) {
N += Nef_polyhedron(iter->first, iter->second, Nef_polyhedron::INCLUDED);
}
print(N);
return 0;
}
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