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40 lines
1.4 KiB
40 lines
1.4 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_COVARIANCE_SCATTER_MATRIX_H
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#define IGL_COVARIANCE_SCATTER_MATRIX_H
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#include "igl_inline.h"
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#include "ARAPEnergyType.h"
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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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/// Construct the covariance scatter matrix for a given arap energy
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///
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/// @param[in] V #V by Vdim list of initial domain positions
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/// @param[in] F #F by 3 list of triangle indices into V
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/// @param[in] energy ARAPEnergyType enum value defining which energy is being used.
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/// See ARAPEnergyType.h for valid options and explanations.
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/// @param[out] CSM dim*#V/#F by dim*#V sparse matrix containing special laplacians along
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/// the diagonal so that when multiplied by V gives covariance matrix
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/// elements, can be used to speed up covariance matrix computation
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///
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/// \see arap_linear_block, arap, ARAPEnergyType
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IGL_INLINE void covariance_scatter_matrix(
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const Eigen::MatrixXd & V,
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const Eigen::MatrixXi & F,
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const ARAPEnergyType energy,
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Eigen::SparseMatrix<double>& CSM);
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}
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#ifndef IGL_STATIC_LIBRARY
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#include "covariance_scatter_matrix.cpp"
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#endif
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#endif
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