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// Copyright (c) 1999 // Utrecht University (The Netherlands), // ETH Zurich (Switzerland), // INRIA Sophia-Antipolis (France), // Max-Planck-Institute Saarbruecken (Germany), // and Tel-Aviv University (Israel). All rights reserved. // // This file is part of CGAL (www.cgal.org) // // $URL: https://github.com/CGAL/cgal/blob/v6.1/Kernel_23/include/CGAL/Line_2.h $ // $Id: include/CGAL/Line_2.h b26b07a1242 $ // SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial // // // Author(s) : Andreas Fabri #ifndef CGAL_LINE_2_H #define CGAL_LINE_2_H #include #include #include #include #include #include namespace CGAL { template class Line_2 : public R_::Kernel_base::Line_2 { typedef typename R_::RT RT; typedef typename R_::FT FT; typedef typename R_::Point_2 Point_2; typedef typename R_::Segment_2 Segment_2; typedef typename R_::Ray_2 Ray_2; typedef typename R_::Vector_2 Vector_2; typedef typename R_::Direction_2 Direction_2; typedef typename R_::Aff_transformation_2 Aff_transformation_2; typedef typename R_::Kernel_base::Line_2 RLine_2; typedef Line_2 Self; static_assert(std::is_same::value); public: typedef Dimension_tag<2> Ambient_dimension; typedef Dimension_tag<1> Feature_dimension; typedef RLine_2 Rep; const Rep& rep() const { return *this; } Rep& rep() { return *this; } typedef R_ R; Line_2() {} Line_2(const RLine_2& l) // conversion impl -> interface class : RLine_2(l) {} Line_2(RLine_2&& l) : RLine_2(std::move(l)) {} Line_2(const Point_2 &p, const Point_2 &q) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), p,q)) {} Line_2(const RT &a, const RT &b, const RT &c) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), a,b,c)) {} explicit Line_2(const Segment_2& s) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), s)) {} explicit Line_2(const Ray_2& r) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), r)) {} Line_2(const Point_2 &p, const Direction_2 &d) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), p,d)) {} Line_2(const Point_2 &p, const Vector_2 &v) : RLine_2(typename R::Construct_line_2()(Return_base_tag(), p,v)) {} decltype(auto) a() const { return R().compute_a_2_object()(*this); } decltype(auto) b() const { return R().compute_b_2_object()(*this); } decltype(auto) c() const { return R().compute_c_2_object()(*this); } Line_2 transform(const Aff_transformation_2 &t) const { return Line_2(t.transform(point(0)), t.transform(direction())); } Line_2 opposite() const { return R().construct_opposite_line_2_object()(*this); } Direction_2 direction() const { return R().construct_direction_2_object()(*this); } Vector_2 to_vector() const { return R().construct_vector_2_object()(*this); } Line_2 perpendicular(const Point_2 &p) const { return R().construct_perpendicular_line_2_object()(*this,p); } Point_2 projection(const Point_2& p) const { return R().construct_projected_point_2_object()(*this,p); } typename R::Boolean is_horizontal() const { return R().is_horizontal_2_object()(*this); } typename R::Boolean is_vertical() const { return R().is_vertical_2_object()(*this); } typename R::Boolean is_degenerate() const { return R().is_degenerate_2_object()(*this); } typename R::Oriented_side oriented_side(const Point_2 &p) const { return R().oriented_side_2_object()(*this,p); } typename R::Boolean has_on_boundary(const Point_2 &p) const { return oriented_side(p) == ON_ORIENTED_BOUNDARY; } typename R::Boolean has_on_positive_side(const Point_2 &p) const { return oriented_side(p) == ON_POSITIVE_SIDE; } typename R::Boolean has_on_negative_side(const Point_2 &p) const { return oriented_side(p) == ON_NEGATIVE_SIDE; } typename R::Boolean has_on(const Point_2 &p) const { return has_on_boundary(p); } FT x_at_y(const FT &y) const { return R().compute_x_at_y_2_object()(*this, y); } FT y_at_x(const FT &y) const { return R().compute_y_at_x_2_object()(*this, y); } Point_2 point() const { return R().construct_point_2_object()(*this); } Point_2 point(const int i) const { return R().construct_point_2_object()(*this, RT(i)); } Point_2 point(const typename First_if_different::Type& i) const { return R().construct_point_2_object()(*this,i); } Point_2 point(const typename First_if_different< const typename First_if_different::Type, int>::Type& i) const { return R().construct_point_2_object()(*this,i); } }; template std::ostream& insert(std::ostream& os, const Line_2& l) { switch(IO::get_mode(os)) { case IO::ASCII : return os << l.a() << ' ' << l.b() << ' ' << l.c(); case IO::BINARY : write(os, l.a()); write(os, l.b()); write(os, l.c()); return os; default: return os << "Line_2(" << l.a() << ", " << l.b() << ", " << l.c() <<')'; } } template < class R > std::ostream & operator<<(std::ostream &os, const Line_2 &l) { return insert(os, l); } template std::istream& extract(std::istream& is, Line_2& l) { typename R::RT a(0), b(0), c(0); switch(IO::get_mode(is)) { case IO::ASCII : is >> IO::iformat(a) >> IO::iformat(b) >> IO::iformat(c); break; case IO::BINARY : read(is, a); read(is, b); read(is, c); break; default: is.setstate(std::ios::failbit); std::cerr << "" << std::endl; std::cerr << "Stream must be in ASCII or binary mode" << std::endl; break; } if (is) l = Line_2(a, b, c); return is; } template < class R > std::istream & operator>>(std::istream &is, Line_2 &l) { return extract(is, l); } } //namespace CGAL #endif // CGAL_LINE_2_H