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#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Nef_polyhedron_3.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/draw_nef_3.h>
#include <fstream>
#include <iostream>
typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;
int main(int argc, char *argv[])
{
// read OFF file into a polyhedron
Polyhedron P1, P2;
std::ifstream ifs1((argc > 1) ? argv[1] : CGAL::data_file_path("meshes/cross_quad.off"));
ifs1 >> P1;
std::ifstream ifs2((argc > 2) ? argv[2] : CGAL::data_file_path("meshes/beam.off"));
ifs2 >> P2;
// initialize nef from polyhedron
Nef_polyhedron N1(P1);
Nef_polyhedron N2(P2);
// draw Nef Polyhedron
CGAL::draw(N1-N2);
return EXIT_SUCCESS;
}
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