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