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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// Alternatively, 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 of
// the License, 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 Lesser General Public License or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#ifndef EIGEN_COMMAINITIALIZER_H
#define EIGEN_COMMAINITIALIZER_H
/** \internal
* Helper class to define the MatrixBase::operator<<
*/
template<typename Derived>
struct MatrixBase<Derived>::CommaInitializer
{
inline CommaInitializer(Derived& mat, const Scalar& s)
: m_matrix(mat), m_row(0), m_col(1), m_currentBlockRows(1)
{
m_matrix.coeffRef(0,0) = s;
}
template<typename OtherDerived>
inline CommaInitializer(Derived& mat, const MatrixBase<OtherDerived>& other)
: m_matrix(mat), m_row(0), m_col(other.cols()), m_currentBlockRows(other.rows())
{
m_matrix.block(0, 0, other.rows(), other.cols()) = other;
}
CommaInitializer& operator,(const Scalar& s)
{
if (m_col==m_matrix.cols())
{
m_row+=m_currentBlockRows;
m_col = 0;
m_currentBlockRows = 1;
ei_assert(m_row<m_matrix.rows()
&& "Too many rows passed to comma initializer (operator<<)");
}
ei_assert(m_col<m_matrix.cols()
&& "Too many coefficients passed to comma initializer (operator<<)");
ei_assert(m_currentBlockRows==1);
m_matrix.coeffRef(m_row, m_col++) = s;
return *this;
}
template<typename OtherDerived>
CommaInitializer& operator,(const MatrixBase<OtherDerived>& other)
{
if (m_col==m_matrix.cols())
{
m_row+=m_currentBlockRows;
m_col = 0;
m_currentBlockRows = other.rows();
ei_assert(m_row+m_currentBlockRows<=m_matrix.rows()
&& "Too many rows passed to comma initializer (operator<<)");
}
ei_assert(m_col<m_matrix.cols()
&& "Too many coefficients passed to comma initializer (operator<<)");
ei_assert(m_currentBlockRows==other.rows());
if (OtherDerived::SizeAtCompileTime != Dynamic)
m_matrix.block<OtherDerived::RowsAtCompileTime != Dynamic ? OtherDerived::RowsAtCompileTime : 1,
OtherDerived::ColsAtCompileTime != Dynamic ? OtherDerived::ColsAtCompileTime : 1>
(m_row, m_col) = other;
else
m_matrix.block(m_row, m_col, other.rows(), other.cols()) = other;
m_col += other.cols();
return *this;
}
inline ~CommaInitializer()
{
ei_assert((m_row+m_currentBlockRows) == m_matrix.rows()
&& m_col == m_matrix.cols()
&& "Too few coefficients passed to comma initializer (operator<<)");
}
/** \returns the built matrix once all its coefficients have been set.
* Calling finished is 100% optional. Its purpose is to write expressions
* like this:
* \code
* quaternion.fromRotationMatrix((Matrix3f() << axis0, axis1, axis2).finished());
* \endcode
*/
inline Derived& finished() { return m_matrix; }
Derived& m_matrix;
int m_row; // current row id
int m_col; // current col id
int m_currentBlockRows; // current block height
};
/** Convenient operator to set the coefficients of a matrix.
*
* The coefficients must be provided in a row major order and exactly match
* the size of the matrix. Otherwise an assertion is raised.
*
* \addexample CommaInit \label How to easily set all the coefficients of a matrix
*
* Example: \include MatrixBase_set.cpp
* Output: \verbinclude MatrixBase_set.out
*/
template<typename Derived>
inline typename MatrixBase<Derived>::CommaInitializer MatrixBase<Derived>::operator<< (const Scalar& s)
{
return CommaInitializer(*static_cast<Derived*>(this), s);
}
/** \sa operator<<(const Scalar&) */
template<typename Derived>
template<typename OtherDerived>
inline typename MatrixBase<Derived>::CommaInitializer
MatrixBase<Derived>::operator<<(const MatrixBase<OtherDerived>& other)
{
return CommaInitializer(*static_cast<Derived *>(this), other);
}
#endif // EIGEN_COMMAINITIALIZER_H
|
