forked from bartvdbraak/blender
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2015 Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Blender Foundation,
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* Bastien Montagne
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __EIGEN3_EIGENVALUES_C_API_CC__
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#define __EIGEN3_EIGENVALUES_C_API_CC__
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/* Eigen gives annoying huge amount of warnings here, silence them! */
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#ifdef __GNUC__
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# pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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#include <Eigen/Core>
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#include <Eigen/Eigenvalues>
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#include "eigenvalues.h"
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using Eigen::SelfAdjointEigenSolver;
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using Eigen::MatrixXf;
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using Eigen::VectorXf;
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using Eigen::Map;
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using Eigen::Success;
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bool EIG_self_adjoint_eigen_solve(const int size, const float *matrix, float *r_eigen_values, float *r_eigen_vectors)
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{
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SelfAdjointEigenSolver<MatrixXf> eigen_solver;
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/* Blender and Eigen matrices are both column-major. */
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eigen_solver.compute(Map<MatrixXf>((float *)matrix, size, size));
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if (eigen_solver.info() != Success) {
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return false;
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}
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if (r_eigen_values) {
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Map<VectorXf>(r_eigen_values, size) = eigen_solver.eigenvalues().transpose();
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}
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if (r_eigen_vectors) {
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Map<MatrixXf>(r_eigen_vectors, size, size) = eigen_solver.eigenvectors();
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}
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return true;
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}
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#endif /* __EIGEN3_EIGENVALUES_C_API_CC__ */
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