37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
/* -*- c++ -*- ----------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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http://lammps.sandia.gov, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------- */
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#ifndef LMP_MATH_EIGEN_H
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#define LMP_MATH_EIGEN_H
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namespace MathEigen {
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/** A specialized function which finds the eigenvalues and eigenvectors
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* of a 3x3 matrix (in double ** format).
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*
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* \param mat the 3x3 matrix you wish to diagonalize
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* \param eval store the eigenvalues here
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* \param evec store the eigenvectors here...
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* \return 0 if eigenvalue calculation converged, 1 if it failed */
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int jacobi3(double const* const* mat, double *eval, double **evec);
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/** \overload */
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int jacobi3(double const mat[3][3], double *eval, double evec[3][3]);
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}
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#endif //#ifndef LMP_MATH_EIGEN_H
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