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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// 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"
using Eigen::Map;
using Eigen::MatrixXi;
// just test a 4x4 matrix, enumerate all combination manually,
// so I don't have to do template-meta-programming here.
template <typename MatType>
void reshape_all_size(MatType m) {
typedef Eigen::Map<MatrixXi> MapMat;
// dynamic
VERIFY_IS_EQUAL((m.template reshape( 1, 16)), MapMat(m.eval().data(), 1, 16));
VERIFY_IS_EQUAL((m.template reshape( 2, 8)), MapMat(m.eval().data(), 2, 8));
VERIFY_IS_EQUAL((m.template reshape( 4, 4)), MapMat(m.eval().data(), 4, 4));
VERIFY_IS_EQUAL((m.template reshape( 8, 2)), MapMat(m.eval().data(), 8, 2));
VERIFY_IS_EQUAL((m.template reshape(16, 1)), MapMat(m.eval().data(), 16, 1));
// static
VERIFY_IS_EQUAL((m.template reshape< 1, 16>()), MapMat(m.eval().data(), 1, 16));
VERIFY_IS_EQUAL((m.template reshape< 2, 8>()), MapMat(m.eval().data(), 2, 8));
VERIFY_IS_EQUAL((m.template reshape< 4, 4>()), MapMat(m.eval().data(), 4, 4));
VERIFY_IS_EQUAL((m.template reshape< 8, 2>()), MapMat(m.eval().data(), 8, 2));
VERIFY_IS_EQUAL((m.template reshape<16, 1>()), MapMat(m.eval().data(), 16, 1));
// reshape chain
VERIFY_IS_EQUAL(
(m
.template reshape( 1, 16)
.template reshape< 2, 8>()
.template reshape(16, 1)
.template reshape< 8, 2>()
.template reshape( 2, 8)
.template reshape< 1, 16>()
.template reshape( 4, 4)
.template reshape<16, 1>()
.template reshape( 8, 2)
.template reshape< 4, 4>()
),
MapMat(m.eval().data(), 4, 4)
);
}
void test_reshape()
{
Eigen::MatrixXi mx = Eigen::MatrixXi::Random(4, 4);
Eigen::Matrix4i m4 = Eigen::Matrix4i::Random(4, 4);
// test dynamic-size matrix
CALL_SUBTEST(reshape_all_size(mx));
// test static-size matrix
CALL_SUBTEST(reshape_all_size(m4));
// test dynamic-size const matrix
CALL_SUBTEST(reshape_all_size(static_cast<const Eigen::MatrixXi>(mx)));
// test static-size const matrix
CALL_SUBTEST(reshape_all_size(static_cast<const Eigen::Matrix4i>(m4)));
}
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