dust3d/thirdparty/cgal/CGAL-5.1/include/CGAL/Cartesian/Scaling_rep_3.h

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// Copyright (c) 2000
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
//
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// This file is part of CGAL (www.cgal.org)
//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Cartesian_kernel/include/CGAL/Cartesian/Scaling_rep_3.h $
// $Id: Scaling_rep_3.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Herve Bronnimann
#ifndef CGAL_CARTESIAN_SCALING_REP_3_H
#define CGAL_CARTESIAN_SCALING_REP_3_H
namespace CGAL {
template < class R >
class Scaling_repC3 : public Aff_transformation_rep_baseC3<R>
{
friend class Aff_transformation_repC3<R>;
friend class Translation_repC3<R>;
public:
typedef typename R::FT FT;
typedef Aff_transformation_rep_baseC3<R> Transformation_base_3;
typedef Aff_transformation_repC3<R> Transformation_3;
typedef Translation_repC3<R> Translation_3;
typedef Scaling_repC3<R> Scaling_3;
typedef typename Transformation_base_3::Point_3 Point_3;
typedef typename Transformation_base_3::Vector_3 Vector_3;
typedef typename Transformation_base_3::Direction_3 Direction_3;
typedef typename Transformation_base_3::Aff_transformation_3
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Aff_transformation_3;
Scaling_repC3() {}
Scaling_repC3(const FT &s) : scalefactor_(s) {}
virtual ~Scaling_repC3() {}
virtual Point_3 transform(const Point_3 &p) const
{
return Point_3(scalefactor_ * p.x(),
scalefactor_ * p.y(),
scalefactor_ * p.z());
}
virtual Vector_3 transform(const Vector_3 &v) const
{
return Vector_3(scalefactor_ * v.x(), scalefactor_ * v.y(),
scalefactor_ * v.z());
}
virtual Direction_3 transform(const Direction_3 &d) const
{
return d;
}
virtual Aff_transformation_3 operator*(const Transformation_base_3 &t) const
{
return t.compose(*this);
}
virtual Aff_transformation_3 compose(const Transformation_3 &t) const
{
return Aff_transformation_3(scalefactor_ * t.t11,
scalefactor_ * t.t12,
scalefactor_ * t.t13,
t.t14,
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scalefactor_ * t.t21,
scalefactor_ * t.t22,
scalefactor_ * t.t23,
t.t24,
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scalefactor_ * t.t31,
scalefactor_ * t.t32,
scalefactor_ * t.t33,
t.t34);
}
virtual Aff_transformation_3 compose(const Translation_3 &t) const
{
FT ft0(0);
return Aff_transformation_3(scalefactor_,
ft0,
ft0,
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t.translationvector_.x(),
ft0,
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scalefactor_,
ft0,
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t.translationvector_.y(),
ft0,
ft0,
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scalefactor_,
t.translationvector_.z());
}
virtual Aff_transformation_3 compose(const Scaling_3 &t) const
{
return Aff_transformation_3(SCALING, scalefactor_*t.scalefactor_);
}
virtual Aff_transformation_3 inverse() const
{
return Aff_transformation_3(SCALING, FT(1)/scalefactor_);
}
virtual Aff_transformation_3 transpose() const
{
return Aff_transformation_3(SCALING, scalefactor_);
}
virtual bool is_even() const
{
return true;
}
virtual FT cartesian(int i, int j) const
{
if (i!=j) return FT(0);
if (i==3) return FT(1);
return scalefactor_;
}
virtual std::ostream &print(std::ostream &os) const
{
os << "Aff_transformationC3(" << scalefactor_ << ")";
return os;
}
private:
FT scalefactor_;
};
} //namespace CGAL
#endif // CGAL_CARTESIAN_SCALING_REP_3_H