1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 or (at your option) any later version.
//
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License along
// with Eigen; if not, write to the Free Software Foundation, Inc., 51
// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. This exception does not invalidate any other reasons why a work
// based on this file might be covered by the GNU General Public License.
#ifndef EIGEN_SCALARMULTIPLE_H
#define EIGEN_SCALARMULTIPLE_H
template<typename FactorType, typename MatrixType> class ScalarMultiple : NoOperatorEquals,
public MatrixBase<typename MatrixType::Scalar, ScalarMultiple<FactorType, MatrixType> >
{
public:
typedef typename MatrixType::Scalar Scalar;
typedef typename MatrixType::Ref MatRef;
friend class MatrixBase<Scalar, ScalarMultiple<FactorType, MatrixType> >;
ScalarMultiple(const MatRef& matrix, FactorType factor)
: m_matrix(matrix), m_factor(factor) {}
private:
static const TraversalOrder _Order = MatrixType::Order;
static const int _RowsAtCompileTime = MatrixType::RowsAtCompileTime,
_ColsAtCompileTime = MatrixType::ColsAtCompileTime;
const ScalarMultiple& _ref() const { return *this; }
int _rows() const { return m_matrix.rows(); }
int _cols() const { return m_matrix.cols(); }
Scalar _coeff(int row, int col) const
{
return m_factor * m_matrix.coeff(row, col);
}
protected:
const MatRef m_matrix;
const FactorType m_factor;
};
#define EIGEN_MAKE_SCALAR_OPS(FactorType) \
/** \relates MatrixBase */ \
template<typename Scalar, typename Derived> \
const ScalarMultiple<FactorType, Derived> \
operator*(const MatrixBase<Scalar, Derived>& matrix, \
FactorType scalar) \
{ \
return ScalarMultiple<FactorType, Derived>(matrix.ref(), scalar); \
} \
\
/** \relates MatrixBase */ \
template<typename Scalar, typename Derived> \
const ScalarMultiple<FactorType, Derived> \
operator*(FactorType scalar, \
const MatrixBase<Scalar, Derived>& matrix) \
{ \
return ScalarMultiple<FactorType, Derived>(matrix.ref(), scalar); \
} \
\
/** \relates MatrixBase */ \
template<typename Scalar, typename Derived> \
const ScalarMultiple<typename NumTraits<FactorType>::FloatingPoint, Derived> \
operator/(const MatrixBase<Scalar, Derived>& matrix, \
FactorType scalar) \
{ \
assert(NumTraits<Scalar>::HasFloatingPoint); \
return matrix * (static_cast< \
typename NumTraits<FactorType>::FloatingPoint \
>(1) / scalar); \
} \
\
template<typename Scalar, typename Derived> \
Derived & \
MatrixBase<Scalar, Derived>::operator*=(const FactorType &other) \
{ \
return *this = *this * other; \
} \
\
template<typename Scalar, typename Derived> \
Derived & \
MatrixBase<Scalar, Derived>::operator/=(const FactorType &other) \
{ \
return *this = *this / other; \
}
EIGEN_MAKE_SCALAR_OPS(int)
EIGEN_MAKE_SCALAR_OPS(float)
EIGEN_MAKE_SCALAR_OPS(double)
EIGEN_MAKE_SCALAR_OPS(std::complex<float>)
EIGEN_MAKE_SCALAR_OPS(std::complex<double>)
#undef EIGEN_MAKE_SCALAR_OPS
#endif // EIGEN_SCALARMULTIPLE_H
|
