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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2017 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2014 yoco <peter.xiau@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
// just test a 4x4 matrix, enumerate all combination manually
template <typename MatType>
void reshape4x4(MatType m)
{
if((MatType::Flags&RowMajorBit)==0)
{
typedef Map<MatrixXi> MapMat;
// dynamic
VERIFY_IS_EQUAL((m.reshaped( 1, 16)), MapMat(m.data(), 1, 16));
VERIFY_IS_EQUAL((m.reshaped( 2, 8)), MapMat(m.data(), 2, 8));
VERIFY_IS_EQUAL((m.reshaped( 4, 4)), MapMat(m.data(), 4, 4));
VERIFY_IS_EQUAL((m.reshaped( 8, 2)), MapMat(m.data(), 8, 2));
VERIFY_IS_EQUAL((m.reshaped(16, 1)), MapMat(m.data(), 16, 1));
// static
VERIFY_IS_EQUAL(m.reshaped(fix< 1>, fix<16>), MapMat(m.data(), 1, 16));
VERIFY_IS_EQUAL(m.reshaped(fix< 2>, fix< 8>), MapMat(m.data(), 2, 8));
VERIFY_IS_EQUAL(m.reshaped(fix< 4>, fix< 4>), MapMat(m.data(), 4, 4));
VERIFY_IS_EQUAL(m.reshaped(fix< 8>, fix< 2>), MapMat(m.data(), 8, 2));
VERIFY_IS_EQUAL(m.reshaped(fix<16>, fix< 1>), MapMat(m.data(), 16, 1));
// reshape chain
VERIFY_IS_EQUAL(
(m
.reshaped( 1, 16)
.reshaped(fix< 2>,fix< 8>)
.reshaped(16, 1)
.reshaped(fix< 8>,fix< 2>)
.reshaped( 2, 8)
.reshaped(fix< 1>,fix<16>)
.reshaped( 4, 4)
.reshaped(fix<16>,fix< 1>)
.reshaped( 8, 2)
.reshaped(fix< 4>,fix< 4>)
),
MapMat(m.data(), 4, 4)
);
}
VERIFY_IS_EQUAL(m.reshaped( 1, 16).data(), m.data());
VERIFY_IS_EQUAL(m.reshaped( 1, 16).innerStride(), 1);
VERIFY_IS_EQUAL(m.reshaped( 2, 8).data(), m.data());
VERIFY_IS_EQUAL(m.reshaped( 2, 8).innerStride(), 1);
VERIFY_IS_EQUAL(m.reshaped( 2, 8).outerStride(), 2);
if((MatType::Flags&RowMajorBit)==0)
{
VERIFY_IS_EQUAL(m.reshaped(2,8,ColOrder),m.reshaped(2,8));
VERIFY_IS_EQUAL(m.reshaped(2,8,ColOrder),m.reshaped(2,8,AutoOrder));
VERIFY_IS_EQUAL(m.transpose().reshaped(2,8,RowOrder),m.transpose().reshaped(2,8,AutoOrder));
}
else
{
VERIFY_IS_EQUAL(m.reshaped(2,8,ColOrder),m.reshaped(2,8));
VERIFY_IS_EQUAL(m.reshaped(2,8,RowOrder),m.reshaped(2,8,AutoOrder));
VERIFY_IS_EQUAL(m.transpose().reshaped(2,8,ColOrder),m.transpose().reshaped(2,8,AutoOrder));
VERIFY_IS_EQUAL(m.transpose().reshaped(2,8),m.transpose().reshaped(2,8,AutoOrder));
}
MatrixXi m28r1 = m.reshaped(2,8,RowOrder);
MatrixXi m28r2 = m.transpose().reshaped(8,2,ColOrder).transpose();
VERIFY_IS_EQUAL( m28r1, m28r2);
}
void test_reshape()
{
typedef Matrix<int,Dynamic,Dynamic> RowMatrixXi;
typedef Matrix<int,4,4> RowMatrix4i;
MatrixXi mx = MatrixXi::Random(4, 4);
Matrix4i m4 = Matrix4i::Random(4, 4);
RowMatrixXi rmx = RowMatrixXi::Random(4, 4);
RowMatrix4i rm4 = RowMatrix4i::Random(4, 4);
// test dynamic-size matrix
CALL_SUBTEST(reshape4x4(mx));
// test static-size matrix
CALL_SUBTEST(reshape4x4(m4));
// test dynamic-size const matrix
CALL_SUBTEST(reshape4x4(static_cast<const MatrixXi>(mx)));
// test static-size const matrix
CALL_SUBTEST(reshape4x4(static_cast<const Matrix4i>(m4)));
CALL_SUBTEST(reshape4x4(rmx));
CALL_SUBTEST(reshape4x4(rm4));
}
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