51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2018 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 ACCUMARRY_H
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#define ACCUMARRY_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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// ACCUMARRY Like Matlab's accumarray. Accumulate values in V using subscripts
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// in S.
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//
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// Inputs:
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// S #S list of subscripts
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// V #V list of values
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// Outputs:
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// A max(subs)+1 list of accumulated values
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template <
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typename DerivedS,
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typename DerivedV,
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typename DerivedA
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>
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void accumarray(
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const Eigen::MatrixBase<DerivedS> & S,
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const Eigen::MatrixBase<DerivedV> & V,
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Eigen::PlainObjectBase<DerivedA> & A);
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// Inputs:
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// S #S list of subscripts
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// V single value used for all
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// Outputs:
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// A max(subs)+1 list of accumulated values
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template <
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typename DerivedS,
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typename DerivedA
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>
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void accumarray(
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const Eigen::MatrixBase<DerivedS> & S,
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const typename DerivedA::Scalar V,
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Eigen::PlainObjectBase<DerivedA> & A);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "accumarray.cpp"
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#endif
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#endif
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