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Scaling2d.h
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1// -*- LSST-C++ -*-
2/*
3 * Developed for the LSST Data Management System.
4 * This product includes software developed by the LSST Project
5 * (https://www.lsst.org).
6 * See the COPYRIGHT file at the top-level directory of this distribution
7 * for details of code ownership.
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
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14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * GNU General Public License for more details.
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20 * along with this program. If not, see <https://www.gnu.org/licenses/>.
21 */
22#ifndef LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED
23#define LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED
24
26#include "lsst/geom/Point.h"
27#include "lsst/geom/Box.h"
28
29namespace lsst { namespace geom { namespace polynomials {
30
48class Scaling2d {
49public:
50
52 Scaling2d(Scaling1d const & x, Scaling1d const & y) noexcept : _x(x), _y(y) {}
53
55 Scaling2d(Scaling2d const &) noexcept = default;
56
58 Scaling2d(Scaling2d &&) noexcept = default;
59
61 Scaling2d & operator=(Scaling2d const &) noexcept = default;
62
64 Scaling2d & operator=(Scaling2d &&) noexcept = default;
65
67 Scaling1d const & getX() const noexcept { return _x; }
68
70 Scaling1d const & getY() const noexcept { return _y; }
71
73 geom::Point2D applyForward(geom::Point2D const & p) const noexcept {
74 return geom::Point2D(getX().applyForward(p.getX()), getY().applyForward(p.getY()));
75 }
76
78 geom::Point2D applyInverse(geom::Point2D const & p) const noexcept {
79 return geom::Point2D(getX().applyInverse(p.getX()), getY().applyInverse(p.getY()));
80 }
81
89 Scaling2d inverted() const noexcept {
90 return Scaling2d(getX().inverted(), getY().inverted());
91 }
92
100 Scaling2d then(Scaling2d const & second) const noexcept {
101 return Scaling2d(getX().then(second.getX()), getY().then(second.getY()));
102 }
103
104private:
105 Scaling1d _x;
106 Scaling1d _y;
107};
108
113 return Scaling2d(
116 );
117}
118
119}}} // namespace lsst::geom::polynomials
120
121#endif // !LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED
A floating-point coordinate rectangle geometry.
Definition Box.h:413
double getMaxY() const noexcept
Definition Box.h:519
double getMaxX() const noexcept
Definition Box.h:518
double getMinY() const noexcept
Definition Box.h:515
double getMinX() const noexcept
Definition Box.h:514
A 1-d affine transform that can be used to map one interval to another.
Definition Scaling1d.h:46
A 2-d separable affine transform that can be used to map one interval to another.
Definition Scaling2d.h:48
geom::Point2D applyInverse(geom::Point2D const &p) const noexcept
Apply the inverse of the forward transform.
Definition Scaling2d.h:78
Scaling2d(Scaling2d &&) noexcept=default
Default move constructor.
geom::Point2D applyForward(geom::Point2D const &p) const noexcept
Apply the transform in the forward direction.
Definition Scaling2d.h:73
Scaling2d inverted() const noexcept
Invert the transform.
Definition Scaling2d.h:89
Scaling1d const & getX() const noexcept
Return the 1-d scaling in the X direction.
Definition Scaling2d.h:67
Scaling2d(Scaling1d const &x, Scaling1d const &y) noexcept
Construct from the given 1-d scalings.
Definition Scaling2d.h:52
Scaling2d then(Scaling2d const &second) const noexcept
Compose two transforms.
Definition Scaling2d.h:100
Scaling1d const & getY() const noexcept
Return the 1-d scaling in the Y direction.
Definition Scaling2d.h:70
Scaling2d(Scaling2d const &) noexcept=default
Default copy constructor.
Low-level polynomials (including special polynomials) in C++.
Scaling2d makeUnitRangeScaling2d(geom::Box2D const &box)
Return a Scaling1d that maps the given box to [-1, 1]x[-1, 1].
Definition Scaling2d.h:112
Scaling1d makeUnitRangeScaling1d(double min, double max) noexcept
Return a Scaling1d that maps the interval [min, max] to [-1, 1].
Definition Scaling1d.h:120
Point< double, 2 > Point2D
Definition Point.h:324