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Eigen  3.4.0
 
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Replicate.h
1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
5//
6// This Source Code Form is subject to the terms of the Mozilla
7// Public License v. 2.0. If a copy of the MPL was not distributed
8// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10#ifndef EIGEN_REPLICATE_H
11#define EIGEN_REPLICATE_H
12
13namespace Eigen {
14
15namespace internal {
16template<typename MatrixType,int RowFactor,int ColFactor>
17struct traits<Replicate<MatrixType,RowFactor,ColFactor> >
18 : traits<MatrixType>
19{
20 typedef typename MatrixType::Scalar Scalar;
21 typedef typename traits<MatrixType>::StorageKind StorageKind;
22 typedef typename traits<MatrixType>::XprKind XprKind;
23 typedef typename ref_selector<MatrixType>::type MatrixTypeNested;
24 typedef typename remove_reference<MatrixTypeNested>::type _MatrixTypeNested;
25 enum {
26 RowsAtCompileTime = RowFactor==Dynamic || int(MatrixType::RowsAtCompileTime)==Dynamic
27 ? Dynamic
28 : RowFactor * MatrixType::RowsAtCompileTime,
29 ColsAtCompileTime = ColFactor==Dynamic || int(MatrixType::ColsAtCompileTime)==Dynamic
30 ? Dynamic
31 : ColFactor * MatrixType::ColsAtCompileTime,
32 //FIXME we don't propagate the max sizes !!!
33 MaxRowsAtCompileTime = RowsAtCompileTime,
34 MaxColsAtCompileTime = ColsAtCompileTime,
35 IsRowMajor = MaxRowsAtCompileTime==1 && MaxColsAtCompileTime!=1 ? 1
36 : MaxColsAtCompileTime==1 && MaxRowsAtCompileTime!=1 ? 0
37 : (MatrixType::Flags & RowMajorBit) ? 1 : 0,
38
39 // FIXME enable DirectAccess with negative strides?
40 Flags = IsRowMajor ? RowMajorBit : 0
41 };
42};
43}
44
61template<typename MatrixType,int RowFactor,int ColFactor> class Replicate
62 : public internal::dense_xpr_base< Replicate<MatrixType,RowFactor,ColFactor> >::type
63{
64 typedef typename internal::traits<Replicate>::MatrixTypeNested MatrixTypeNested;
65 typedef typename internal::traits<Replicate>::_MatrixTypeNested _MatrixTypeNested;
66 public:
67
68 typedef typename internal::dense_xpr_base<Replicate>::type Base;
69 EIGEN_DENSE_PUBLIC_INTERFACE(Replicate)
70 typedef typename internal::remove_all<MatrixType>::type NestedExpression;
71
72 template<typename OriginalMatrixType>
73 EIGEN_DEVICE_FUNC
74 inline explicit Replicate(const OriginalMatrixType& matrix)
75 : m_matrix(matrix), m_rowFactor(RowFactor), m_colFactor(ColFactor)
76 {
77 EIGEN_STATIC_ASSERT((internal::is_same<typename internal::remove_const<MatrixType>::type,OriginalMatrixType>::value),
78 THE_MATRIX_OR_EXPRESSION_THAT_YOU_PASSED_DOES_NOT_HAVE_THE_EXPECTED_TYPE)
79 eigen_assert(RowFactor!=Dynamic && ColFactor!=Dynamic);
80 }
81
82 template<typename OriginalMatrixType>
83 EIGEN_DEVICE_FUNC
84 inline Replicate(const OriginalMatrixType& matrix, Index rowFactor, Index colFactor)
85 : m_matrix(matrix), m_rowFactor(rowFactor), m_colFactor(colFactor)
86 {
87 EIGEN_STATIC_ASSERT((internal::is_same<typename internal::remove_const<MatrixType>::type,OriginalMatrixType>::value),
88 THE_MATRIX_OR_EXPRESSION_THAT_YOU_PASSED_DOES_NOT_HAVE_THE_EXPECTED_TYPE)
89 }
90
91 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
92 inline Index rows() const { return m_matrix.rows() * m_rowFactor.value(); }
93 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
94 inline Index cols() const { return m_matrix.cols() * m_colFactor.value(); }
95
96 EIGEN_DEVICE_FUNC
97 const _MatrixTypeNested& nestedExpression() const
98 {
99 return m_matrix;
100 }
101
102 protected:
103 MatrixTypeNested m_matrix;
104 const internal::variable_if_dynamic<Index, RowFactor> m_rowFactor;
105 const internal::variable_if_dynamic<Index, ColFactor> m_colFactor;
106};
107
116template<typename Derived>
117template<int RowFactor, int ColFactor>
118EIGEN_DEVICE_FUNC const Replicate<Derived,RowFactor,ColFactor>
120{
122}
123
132template<typename ExpressionType, int Direction>
135{
137 (_expression(),Direction==Vertical?factor:1,Direction==Horizontal?factor:1);
138}
139
140} // end namespace Eigen
141
142#endif // EIGEN_REPLICATE_H
Base class for all dense matrices, vectors, and arrays.
Definition: DenseBase.h:47
Expression of the multiple replication of a matrix or vector.
Definition: Replicate.h:63
Pseudo expression providing broadcasting and partial reduction operations.
Definition: VectorwiseOp.h:187
Eigen::Index Index
Definition: VectorwiseOp.h:192
@ Horizontal
Definition: Constants.h:267
@ Vertical
Definition: Constants.h:264
const unsigned int RowMajorBit
Definition: Constants.h:66
Namespace containing all symbols from the Eigen library.
Definition: Core:141
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:74
const int Dynamic
Definition: Constants.h:22