143 lines
3.9 KiB
C++
Executable File
143 lines
3.9 KiB
C++
Executable File
// Copyright (c) 2000
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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//
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//
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// Author(s) : Herve Bronnimann
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#ifndef CGAL_CARTESIAN_SCALING_REP_2_H
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#define CGAL_CARTESIAN_SCALING_REP_2_H
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namespace CGAL {
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template < class R >
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class Scaling_repC2: public Aff_transformation_rep_baseC2<R>
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{
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friend class Aff_transformation_repC2<R>;
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friend class Translation_repC2<R>;
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friend class Rotation_repC2<R>;
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public:
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typedef Aff_transformation_rep_baseC2<R> Aff_t_base;
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typedef typename Aff_t_base::FT FT;
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typedef typename Aff_t_base::Point_2 Point_2;
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typedef typename Aff_t_base::Vector_2 Vector_2;
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typedef typename Aff_t_base::Direction_2 Direction_2;
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typedef typename Aff_t_base::Aff_transformation_2 Aff_transformation_2;
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typedef Aff_transformation_repC2<R> Transformation;
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typedef Translation_repC2<R> Translation;
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typedef Rotation_repC2<R> Rotation;
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typedef Scaling_repC2<R> Scaling;
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Scaling_repC2()
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{}
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Scaling_repC2(const FT &scalefactor) :
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scalefactor_(scalefactor)
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{}
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~Scaling_repC2()
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{}
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Point_2 transform(const Point_2 &p) const
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{
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return Point_2(scalefactor_ * p.x(), scalefactor_ * p.y());
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}
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Vector_2 transform(const Vector_2 &p) const
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{
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return Vector_2(scalefactor_ * p.x(), scalefactor_ * p.y());
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}
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Direction_2 transform(const Direction_2 &d) const
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{
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return d;
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}
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Aff_transformation_2 operator*(const Aff_t_base &t) const
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{
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return t.compose(*this);
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}
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Aff_transformation_2 compose(const Translation &t) const
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{
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FT ft0(0);
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return Aff_transformation_2(scalefactor_,
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ft0,
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t.translationvector_.x(),
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ft0,
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scalefactor_,
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t.translationvector_.y());
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}
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Aff_transformation_2 compose(const Rotation &t) const
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{
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return Aff_transformation_2(scalefactor_ * t.cosinus_,
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scalefactor_ * -t.sinus_,
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scalefactor_ * t.sinus_,
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scalefactor_ * t.cosinus_);
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}
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Aff_transformation_2 compose(const Scaling &t) const
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{
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return Aff_transformation_2(SCALING, scalefactor_*t.scalefactor_);
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}
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Aff_transformation_2 compose(const Transformation &t) const
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{
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return Aff_transformation_2(scalefactor_ * t.t11,
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scalefactor_ * t.t12,
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t.t13,
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scalefactor_ * t.t21,
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scalefactor_ * t.t22,
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t.t23);
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}
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Aff_transformation_2 inverse() const
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{
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return Aff_transformation_2(SCALING, FT(1)/scalefactor_);
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}
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bool is_even() const
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{
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return true;
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}
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FT cartesian(int i, int j) const
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{
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if (i!=j) return FT(0);
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return (i==2) ? FT(1) : scalefactor_;
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}
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std::ostream &print(std::ostream &os) const
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{
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os << "Aff_transformationC2(" << scalefactor_ << ")";
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return os;
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}
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private:
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FT scalefactor_;
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};
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} //namespace CGAL
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#endif // CGAL_CARTESIAN_SCALING_REP_2_H
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