CGAL 6.1.2 - 2D Movable Separability of Sets: Set_movable_separability_2/is_pullout_direction_single_mold_trans_cast.cpp

CGAL 6.1.2 - 2D Movable Separability of Sets

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Set_movable_separability_2/is_pullout_direction_single_mold_trans_cast.cpp
#include <fstream>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Set_movable_separability_2/Single_mold_translational_casting/is_pullout_direction.h>
typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef Kernel::Vector_2 Vector_2;
typedef Kernel::Point_2 Point_2;
typedef Kernel::Direction_2 Direction_2;
typedef CGAL::Polygon_2<Kernel> Polygon_2;
namespace SMS = CGAL::Set_movable_separability_2;
namespace casting = SMS::Single_mold_translational_casting;
template <typename Kernel>
inline std::pair<typename Kernel::Direction_2, typename Kernel::Direction_2>
get_segment_outer_circle(const typename Kernel::Segment_2 seg,
const CGAL::Orientation orientation)
{
typename Kernel::Direction_2 forward( seg);
typename Kernel::Direction_2 backward(-forward);
return (orientation == CGAL::CLOCKWISE) ?
std::make_pair(backward, forward) : std::make_pair(forward, backward);
}
// The main program:
int main(int argc, char* argv[])
{
Polygon_2 polygon;
const char* filename = (argc > 1) ? argv[1] : "polygon.dat";
std::ifstream input_file(filename);
if (! input_file.is_open()) {
std::cerr << "Failed to open the " << filename << std::endl;
return -1;
}
input_file >> polygon;
input_file.close();
// Example for is_pullout_direction_single_mold_translational_casting_2 that
// accepts the edge
size_t index(0);
for (auto e_it = polygon.edges_begin(); e_it != polygon.edges_end(); ++e_it,
++index)
{
auto orientation = polygon.orientation();
auto segment_outer_circle = get_segment_outer_circle<Kernel>(*e_it, orientation);
auto d = segment_outer_circle.first;
d = d.perpendicular(CGAL::CLOCKWISE);
auto res = casting::is_pullout_direction(polygon, e_it, d);
std::cout << "The polygon is " << (res ? "" : "not ")
<< "castable using edge "
<< index << " in vertical translation (" << d << ")" << std::endl;
}
std::cout << "-----------------------------------"<< std::endl;
// Example for is_pullout_direction_single_mold_translational_casting_2 that
// do not accepts the edge
{
Vector_2 v (Point_2(0,0), Point_2(1,0));
Direction_2 d(v);
auto res = casting::is_pullout_direction(polygon, d);
if (res != polygon.edges_end()) {
std::cout << "The polygon is castable in direction d (" << d
<< ") using edge "<< *res << std::endl;
}
else {
std::cout << "The polygon is not castable in direction d (" << d << ")"
<< std::endl;
}
}
return 0;
}
CGAL::Exact_predicates_exact_constructions_kernel
CGAL::Polygon_2
Kernel::Direction_2
Kernel::Point_2
Kernel::Segment_2
Kernel::Vector_2
CGAL::Sign
Sign
CGAL::CLOCKWISE
const CGAL::Orientation CLOCKWISE
CGAL::orientation
Orientation orientation(const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q, const CGAL::Point_2< Kernel > &r)
CGAL::Set_movable_separability_2
Definition: is_pullout_direction.h:2
Kernel