MOAB: Mesh Oriented datABase  (version 5.2.1)
TInverseMeanRatio.hpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2007 Sandia National Laboratories.  Developed at the
00005     University of Wisconsin--Madison under SNL contract number
00006     624796.  The U.S. Government and the University of Wisconsin
00007     retain certain rights to this software.
00008 
00009     This library is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU Lesser General Public
00011     License as published by the Free Software Foundation; either
00012     version 2.1 of the License, or (at your option) any later version.
00013 
00014     This library is distributed in the hope that it will be useful,
00015     but WITHOUT ANY WARRANTY; without even the implied warranty of
00016     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017     Lesser General Public License for more details.
00018 
00019     You should have received a copy of the GNU Lesser General Public License
00020     (lgpl.txt) along with this library; if not, write to the Free Software
00021     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 
00023     (2008) kraftche@cae.wisc.edu
00024 
00025   ***************************************************************** */
00026 
00027 /** \file TInverseMeanRatio.hpp
00028  *  \brief
00029  *  \author Jason Kraftcheck
00030  */
00031 
00032 #ifndef MSQ_T_INVERSE_MEAN_RATIO_HPP
00033 #define MSQ_T_INVERSE_MEAN_RATIO_HPP
00034 
00035 #include "Mesquite.hpp"
00036 #include "TMetricBarrier.hpp"
00037 #include <limits>
00038 
00039 namespace MBMesquite
00040 {
00041 
00042 /** \f$ \frac{|T|^2}{2 det(T)} - 1 \f$ */
00043 class TInverseMeanRatio : public TMetricBarrier
00044 {
00045   public:
00046     MESQUITE_EXPORT virtual ~TInverseMeanRatio();
00047 
00048     MESQUITE_EXPORT virtual std::string get_name() const;
00049 
00050     MESQUITE_EXPORT virtual bool evaluate( const MsqMatrix< 2, 2 >& T, double& result, MsqError& err );
00051 
00052     /** \f$ \frac{1}{det(T)} [ T - \frac{|T|^2}{2 det(T)}adj(T) ] \f$ */
00053     MESQUITE_EXPORT virtual bool evaluate_with_grad( const MsqMatrix< 2, 2 >& T, double& result,
00054                                                      MsqMatrix< 2, 2 >& deriv_wrt_T, MsqError& err );
00055 
00056     MESQUITE_EXPORT virtual bool evaluate_with_hess( const MsqMatrix< 2, 2 >& T, double& result,
00057                                                      MsqMatrix< 2, 2 >& deriv_wrt_T, MsqMatrix< 2, 2 > second_wrt_T[3],
00058                                                      MsqError& err );
00059 
00060     MESQUITE_EXPORT virtual bool evaluate( const MsqMatrix< 3, 3 >& T, double& result, MsqError& err );
00061 
00062     MESQUITE_EXPORT virtual bool evaluate_with_grad( const MsqMatrix< 3, 3 >& T, double& result,
00063                                                      MsqMatrix< 3, 3 >& deriv_wrt_T, MsqError& err );
00064 
00065     MESQUITE_EXPORT virtual bool evaluate_with_hess( const MsqMatrix< 3, 3 >& T, double& result,
00066                                                      MsqMatrix< 3, 3 >& deriv_wrt_T, MsqMatrix< 3, 3 > second_wrt_T[6],
00067                                                      MsqError& err );
00068 };
00069 
00070 }  // namespace MBMesquite
00071 
00072 #endif
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