62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_TRANSPOSE_BLOCKS_H
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#define IGL_TRANSPOSE_BLOCKS_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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// Templates:
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// T should be a eigen matrix primitive type like int or double
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// Inputs:
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// A m*k by n (dim: 1) or m by n*k (dim: 2) eigen Matrix of type T values
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// k number of blocks
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// dim dimension in which to transpose
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// Output
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// B n*k by m (dim: 1) or n by m*k (dim: 2) eigen Matrix of type T values,
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// NOT allowed to be the same as A
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//
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// Example:
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// A = [
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// 1 2 3 4
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// 5 6 7 8
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// 101 102 103 104
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// 105 106 107 108
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// 201 202 203 204
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// 205 206 207 208];
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// transpose_blocks(A,1,3,B);
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// B -> [
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// 1 5
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// 2 6
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// 3 7
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// 4 8
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// 101 105
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// 102 106
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// 103 107
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// 104 108
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// 201 205
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// 202 206
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// 203 207
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// 204 208];
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//
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template <typename T>
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IGL_INLINE void transpose_blocks(
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const Eigen::Matrix<T,Eigen::Dynamic,Eigen::Dynamic> & A,
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const size_t k,
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const size_t dim,
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Eigen::Matrix<T,Eigen::Dynamic,Eigen::Dynamic> & B);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "transpose_blocks.cpp"
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#endif
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#endif
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