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40 lines
1.1 KiB
40 lines
1.1 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2020 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_BLKDIAG_H
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#define IGL_BLKDIAG_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <Eigen/Sparse>
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#include <vector>
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namespace igl
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{
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// Given a list of matrices place them along the diagonal as blocks of the
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// output matrix. Like matlab's blkdiag.
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//
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// Inputs:
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// L list of matrices {A,B, ...}
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// Outputs:
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// Y A.rows()+B.rows()+... by A.cols()+B.cols()+... block diagonal
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//
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// See also: cat, repdiag
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template <typename Scalar>
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IGL_INLINE void blkdiag(
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const std::vector<Eigen::SparseMatrix<Scalar>> & L,
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Eigen::SparseMatrix<Scalar> & Y);
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template <typename DerivedY>
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IGL_INLINE void blkdiag(
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const std::vector<DerivedY> & L,
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Eigen::PlainObjectBase<DerivedY> & Y);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "blkdiag.cpp"
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#endif
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#endif
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