Line.h

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#pragma once
 
#ifdef OGDF_INCLUDE_CGAL
 
#   include <ogdf/geometric/cr_min/geometry/objects/Point.h>
#   include <ogdf/geometric/cr_min/geometry/objects/Vector.h>
 
#   include <CGAL/Line_2.h>
#   include <math.h>
 
namespace ogdf {
namespace internal {
namespace gcm {
namespace geometry {
using namespace tools;
template<typename kernel>
using Line_t = CGAL::Line_2<kernel>;
 
template<typename kernel>
inline bool turn(const Line_t<kernel>& l1, const Line_t<kernel>& l2) {
    return turn(l1.to_vector(), l2.to_vector());
}
 
template<typename kernel>
inline bool left_turn(const Line_t<kernel>& l1, const Line_t<kernel>& l2) {
    return left_turn(l1.to_vector(), l2.to_vector());
}
 
template<typename kernel>
inline bool right_turn(const Line_t<kernel>& l1, const Line_t<kernel>& l2) {
    return right_turn(l1.to_vector(), l2.to_vector());
}
 
template<typename kernel>
inline bool turn(const Line_t<kernel>& l, const Point_t<kernel>& p) {
    return turn(l.to_vector(), p - l.point(0));
}
 
template<typename kernel>
inline bool left_turn(const Line_t<kernel>& l, const Point_t<kernel>& p) {
    return left_turn(l.to_vector(), p - l.point(0));
}
 
template<typename kernel>
inline bool right_turn(const Line_t<kernel>& l, const Point_t<kernel>& p) {
    return right_turn(l.to_vector(), p - l.point(0));
}
 
template<typename kernel>
inline Point_t<kernel> intersect(const Line_t<kernel>& l1, const Line_t<kernel>& l2) {
    OGDF_ASSERT(!l1.is_degenerate());
    OGDF_ASSERT(!l2.is_degenerate());
    auto result = CGAL::intersection(l1, l2);
    if (!result) {
        return Point_t<kernel>(std::numeric_limits<unsigned int>::max(),
                std::numeric_limits<unsigned int>::max());
    }
 
    Point_t<kernel> intersection;
    if (boost::get<Line_t<kernel>>(&*result)) {
        auto s = boost::get<Line_t<kernel>>(&*result);
        intersection = s->point(0);
    } else {
        intersection = *boost::get<Point_t<kernel>>(&*result);
    }
    return intersection;
}
 
} /* namespace geometry */
}
}
}
 
#endif