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58 lines
1.9 KiB
58 lines
1.9 KiB
1 year ago
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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_CUMSUM_H
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#define IGL_CUMSUM_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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/// Computes a cumulative sum of the columns of X, like matlab's `cumsum`.
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///
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/// @tparam DerivedX Type of matrix X
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/// @tparam DerivedY Type of matrix Y
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/// @param[in] X m by n Matrix to be cumulatively summed.
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/// @param[in] dim dimension to take cumulative sum (1 or 2)
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/// @param[out] Y m by n Matrix containing cumulative sum.
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///
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template <typename DerivedX, typename DerivedY>
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IGL_INLINE void cumsum(
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const Eigen::MatrixBase<DerivedX > & X,
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const int dim,
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Eigen::PlainObjectBase<DerivedY > & Y);
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/// Computes a cumulative sum of the columns of [0;X]
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///
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/// @param[in] X m by n Matrix to be cumulatively summed.
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/// @param[in] dim dimension to take cumulative sum (1 or 2)
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/// @param[in] zero_prefix whether to use zero prefix
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/// @param[out] Y if zero_prefix == false
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/// m by n Matrix containing cumulative sum
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/// else
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/// m+1 by n Matrix containing cumulative sum if dim=1
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/// or
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/// m by n+1 Matrix containing cumulative sum if dim=2
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template <typename DerivedX, typename DerivedY>
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IGL_INLINE void cumsum(
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const Eigen::MatrixBase<DerivedX > & X,
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const int dim,
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const bool zero_prefix,
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Eigen::PlainObjectBase<DerivedY > & Y);
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//template <typename DerivedX, typename DerivedY>
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//IGL_INLINE void cumsum(
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// const Eigen::MatrixBase<DerivedX > & X,
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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 "cumsum.cpp"
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#endif
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#endif
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