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79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2014 yoco <peter.xiau@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include "main.h"
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using Eigen::Map;
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using Eigen::MatrixXi;
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// just test a 4x4 matrix, enumerate all combination manually,
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// so I don't have to do template-meta-programming here.
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template <typename MatType>
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void reshape_all_size(MatType m)
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{
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typedef Eigen::Map<MatrixXi> MapMat;
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// dynamic
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VERIFY_IS_EQUAL((m.reshaped( 1, 16)), MapMat(m.data(), 1, 16));
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VERIFY_IS_EQUAL((m.reshaped( 2, 8)), MapMat(m.data(), 2, 8));
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VERIFY_IS_EQUAL((m.reshaped( 4, 4)), MapMat(m.data(), 4, 4));
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VERIFY_IS_EQUAL((m.reshaped( 8, 2)), MapMat(m.data(), 8, 2));
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VERIFY_IS_EQUAL((m.reshaped(16, 1)), MapMat(m.data(), 16, 1));
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// static
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VERIFY_IS_EQUAL(m.reshaped(fix< 1>, fix<16>), MapMat(m.data(), 1, 16));
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VERIFY_IS_EQUAL(m.reshaped(fix< 2>, fix< 8>), MapMat(m.data(), 2, 8));
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VERIFY_IS_EQUAL(m.reshaped(fix< 4>, fix< 4>), MapMat(m.data(), 4, 4));
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VERIFY_IS_EQUAL(m.reshaped(fix< 8>, fix< 2>), MapMat(m.data(), 8, 2));
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VERIFY_IS_EQUAL(m.reshaped(fix<16>, fix< 1>), MapMat(m.data(), 16, 1));
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// reshape chain
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VERIFY_IS_EQUAL(
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(m
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.reshaped( 1, 16)
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.reshaped(fix< 2>,fix< 8>)
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.reshaped(16, 1)
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.reshaped(fix< 8>,fix< 2>)
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.reshaped( 2, 8)
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.reshaped(fix< 1>,fix<16>)
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.reshaped( 4, 4)
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.reshaped(fix<16>,fix< 1>)
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.reshaped( 8, 2)
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.reshaped(fix< 4>,fix< 4>)
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),
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MapMat(m.data(), 4, 4)
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);
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VERIFY_IS_EQUAL(m.reshaped( 1, 16).data(), m.data());
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VERIFY_IS_EQUAL(m.reshaped( 1, 16).innerStride(), 1);
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VERIFY_IS_EQUAL(m.reshaped( 2, 8).data(), m.data());
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VERIFY_IS_EQUAL(m.reshaped( 2, 8).innerStride(), 1);
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VERIFY_IS_EQUAL(m.reshaped( 2, 8).outerStride(), 2);
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m.reshaped(2,8,ColOrder);
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MatrixXi m28r = m.reshaped(2,8,RowOrder);
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std::cout << m28r << "\n";
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}
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void test_reshape()
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{
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Eigen::MatrixXi mx = Eigen::MatrixXi::Random(4, 4);
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Eigen::Matrix4i m4 = Eigen::Matrix4i::Random(4, 4);
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// test dynamic-size matrix
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CALL_SUBTEST(reshape_all_size(mx));
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// test static-size matrix
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CALL_SUBTEST(reshape_all_size(m4));
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// test dynamic-size const matrix
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CALL_SUBTEST(reshape_all_size(static_cast<const Eigen::MatrixXi>(mx)));
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// test static-size const matrix
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CALL_SUBTEST(reshape_all_size(static_cast<const Eigen::Matrix4i>(m4)));
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}
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