144 lines
4.2 KiB
C++
144 lines
4.2 KiB
C++
// 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)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Cartesian_kernel/include/CGAL/Cartesian/Scaling_rep_3.h $
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// $Id: Scaling_rep_3.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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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_3_H
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#define CGAL_CARTESIAN_SCALING_REP_3_H
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namespace CGAL {
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template < class R >
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class Scaling_repC3 : public Aff_transformation_rep_baseC3<R>
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{
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friend class Aff_transformation_repC3<R>;
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friend class Translation_repC3<R>;
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public:
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typedef typename R::FT FT;
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typedef Aff_transformation_rep_baseC3<R> Transformation_base_3;
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typedef Aff_transformation_repC3<R> Transformation_3;
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typedef Translation_repC3<R> Translation_3;
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typedef Scaling_repC3<R> Scaling_3;
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typedef typename Transformation_base_3::Point_3 Point_3;
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typedef typename Transformation_base_3::Vector_3 Vector_3;
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typedef typename Transformation_base_3::Direction_3 Direction_3;
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typedef typename Transformation_base_3::Aff_transformation_3
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Aff_transformation_3;
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Scaling_repC3() {}
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Scaling_repC3(const FT &s) : scalefactor_(s) {}
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virtual ~Scaling_repC3() {}
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virtual Point_3 transform(const Point_3 &p) const
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{
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return Point_3(scalefactor_ * p.x(),
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scalefactor_ * p.y(),
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scalefactor_ * p.z());
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}
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virtual Vector_3 transform(const Vector_3 &v) const
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{
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return Vector_3(scalefactor_ * v.x(), scalefactor_ * v.y(),
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scalefactor_ * v.z());
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}
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virtual Direction_3 transform(const Direction_3 &d) const
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{
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return d;
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}
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virtual Aff_transformation_3 operator*(const Transformation_base_3 &t) const
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{
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return t.compose(*this);
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}
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virtual Aff_transformation_3 compose(const Transformation_3 &t) const
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{
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return Aff_transformation_3(scalefactor_ * t.t11,
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scalefactor_ * t.t12,
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scalefactor_ * t.t13,
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t.t14,
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scalefactor_ * t.t21,
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scalefactor_ * t.t22,
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scalefactor_ * t.t23,
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t.t24,
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scalefactor_ * t.t31,
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scalefactor_ * t.t32,
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scalefactor_ * t.t33,
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t.t34);
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}
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virtual Aff_transformation_3 compose(const Translation_3 &t) const
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{
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FT ft0(0);
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return Aff_transformation_3(scalefactor_,
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ft0,
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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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ft0,
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t.translationvector_.y(),
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ft0,
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ft0,
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scalefactor_,
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t.translationvector_.z());
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}
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virtual Aff_transformation_3 compose(const Scaling_3 &t) const
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{
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return Aff_transformation_3(SCALING, scalefactor_*t.scalefactor_);
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}
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virtual Aff_transformation_3 inverse() const
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{
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return Aff_transformation_3(SCALING, FT(1)/scalefactor_);
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}
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virtual Aff_transformation_3 transpose() const
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{
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return Aff_transformation_3(SCALING, scalefactor_);
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}
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virtual bool is_even() const
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{
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return true;
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}
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virtual 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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if (i==3) return FT(1);
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return scalefactor_;
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}
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virtual std::ostream &print(std::ostream &os) const
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{
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os << "Aff_transformationC3(" << 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_3_H
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