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69 lines
2.2 KiB
69 lines
2.2 KiB
// 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_SLICE_INTO_H
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#define IGL_SLICE_INTO_H
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#include "igl_inline.h"
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#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
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#include <Eigen/Dense>
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#include <Eigen/Sparse>
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namespace igl
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{
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/// Act like the matlab Y(row_indices,col_indices) = X
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///
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/// @param[in] X xm by xn rhs matrix
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/// @param[in] R list of row indices
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/// @param[in] C list of column indices
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/// @param[in] Y ym by yn lhs matrix
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/// @param[out] Y ym by yn lhs matrix, same as input but Y(R,C) = X
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///
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///
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/// \see slice
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template <typename T, typename DerivedR, typename DerivedC>
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IGL_INLINE void slice_into(
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const Eigen::SparseMatrix<T>& X,
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const Eigen::MatrixBase<DerivedR> & R,
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const Eigen::MatrixBase<DerivedC> & C,
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Eigen::SparseMatrix<T>& Y);
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/// \overload
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/// \brief Wrapper to only slice in one direction
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///
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/// @param[int] dim dimension to slice in 1 or 2, dim=1 --> X(R,:), dim=2 --> X(:,R)
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///
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/// \note For now this is just a cheap wrapper.
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template <typename MatX, typename MatY, typename DerivedR>
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IGL_INLINE void slice_into(
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const MatX & X,
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const Eigen::MatrixBase<DerivedR> & R,
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const int dim,
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MatY& Y);
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/// \overload
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///
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/// \deprecated
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///
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/// See slice.h for more details
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template <typename DerivedX, typename DerivedY, typename DerivedR, typename DerivedC>
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IGL_INLINE void slice_into(
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const Eigen::MatrixBase<DerivedX> & X,
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const Eigen::MatrixBase<DerivedR> & R,
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const Eigen::MatrixBase<DerivedC> & C,
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Eigen::PlainObjectBase<DerivedY> & Y);
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/// \overload
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/// \brief Vector version
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template <typename DerivedX, typename DerivedR, typename DerivedY>
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IGL_INLINE void slice_into(
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const Eigen::MatrixBase<DerivedX>& X,
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const Eigen::MatrixBase<DerivedR>& R,
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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 "slice_into.cpp"
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#endif
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#endif
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