Nef_3/transformation.cpp

#include <CGAL/Exact_integer.h>
#include <CGAL/Extended_homogeneous.h>
#include <CGAL/Nef_polyhedron_3.h>
#include <CGAL/IO/Nef_polyhedron_iostream_3.h>
 
 
//instead of
//typedef CGAL::Extended_homogeneous<CGAL::Exact_integer>  Kernel;
// workaround for VC++
struct Kernel : public CGAL::Extended_homogeneous<CGAL::Exact_integer> {};
 
typedef CGAL::Nef_polyhedron_3<Kernel>  Nef_polyhedron;
typedef Nef_polyhedron::Plane_3  Plane_3;
typedef Nef_polyhedron::Vector_3  Vector_3;
typedef Nef_polyhedron::Aff_transformation_3  Aff_transformation_3;
 
int main() {
 
  Nef_polyhedron N(Plane_3(0,1,0,0));
  Aff_transformation_3 transl(CGAL::TRANSLATION, Vector_3(5, 7, 9));
  Aff_transformation_3 rotx90(1,0,0,
                              0,0,-1,
                              0,1,0,
                              1);
  Aff_transformation_3 scale(3,0,0,
                             0,3,0,
                             0,0,3,
                             2);
 
  N.transform(transl);
  CGAL_assertion(N == Nef_polyhedron(Plane_3(0,1,0,-7)));
  N.transform(rotx90);
  CGAL_assertion(N == Nef_polyhedron(Plane_3(0,0,1,-7)));
  N.transform(scale);
  CGAL_assertion(N == Nef_polyhedron(Plane_3(0,0,2,-21)));
 
  return 0;
}