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LSST Data Management Base Package
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EllipticityBase.h
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1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2008, 2009, 2010 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25#ifndef LSST_AFW_GEOM_ELLIPSES_EllipticityBase_h_INCLUDED
26#define LSST_AFW_GEOM_ELLIPSES_EllipticityBase_h_INCLUDED
27
28#include "Eigen/Core"
29#include <complex>
30
31namespace lsst {
32namespace afw {
33namespace geom {
34namespace ellipses {
35
36namespace detail {
37
46public:
47 using Jacobian = Eigen::Matrix2d;
48
49 enum ParameterEnum { E1 = 0, E2 = 1 };
50
52
53 std::complex<double> const& getComplex() const { return _complex; }
54
56
57 double getE1() const { return _complex.real(); }
58 void setE1(double e1) {
59#if __cplusplus < 201103L
61#else
62 _complex.real(e1);
63#endif
64 }
65
66 double getE2() const { return _complex.imag(); }
67 void setE2(double e2) {
68#if __cplusplus < 201103L
70#else
71 _complex.imag(e2);
72#endif
73 }
74
75 double getE() const { return std::sqrt(std::norm(_complex)); }
76 void setE(double e) { _complex *= e / getE(); }
77
78 double getTheta() const { return 0.5 * std::arg(_complex); }
79
84 ~EllipticityBase() = default;
85
86protected:
87 explicit EllipticityBase(std::complex<double> const& complex) : _complex(complex) {}
88
89 explicit EllipticityBase(double e1 = 0.0, double e2 = 0.0) : _complex(e1, e2) {}
90
92};
93
94} // namespace detail
95} // namespace ellipses
96} // namespace geom
97} // namespace afw
98} // namespace lsst
99
100#endif // !LSST_AFW_GEOM_ELLIPSES_EllipticityBase_h_INCLUDED
EllipticityBase is a base class for complex ellipticity types.
EllipticityBase(EllipticityBase const &)=default
std::complex< double > const & getComplex() const
void setComplex(std::complex< double > const &v)
EllipticityBase & operator=(EllipticityBase &&)=default
EllipticityBase(std::complex< double > const &complex)
EllipticityBase & operator=(EllipticityBase const &)=default
T imag(T... args)
T real(T... args)
T sqrt(T... args)