MOAB: Mesh Oriented datABase  (version 5.2.1)
AWMetricBarrier.hpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2006 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     (2006) kraftche@cae.wisc.edu
00024 
00025   ***************************************************************** */
00026 
00027 /** \file AWMetricBarrier.hpp
00028  *  \brief
00029  *  \author Boyd Tidwell
00030  */
00031 
00032 #ifndef MSQ_AW_METRIC_BARRIER_HPP
00033 #define MSQ_AW_METRIC_BARRIER_HPP
00034 
00035 #include "Mesquite.hpp"
00036 #include "AWMetric.hpp"
00037 #include <string>
00038 
00039 namespace MBMesquite
00040 {
00041 
00042 static const std::string& barrier_violated_msg_aw =
00043     " Barrier of barrier metric has been violated due to negative volume.\n \
00044   Hint: If your initial mesh is tangled, you must use a non-Barrier metric.\n \
00045         If a Barrier metric is used, you can only use untangled initial meshes.\n";
00046 
00047 class MsqError;
00048 template < unsigned R, unsigned C >
00049 class MsqMatrix;
00050 
00051 /**\brief A metric for comparing a matrix A with a target matrix W
00052  *
00053  * Implement a scalar function \f$\mu(A,W)\f$ where A and W are 2x2 or 3x3 matrices.
00054  */
00055 class AWMetricBarrier : public AWMetric
00056 {
00057   public:
00058     MESQUITE_EXPORT virtual ~AWMetricBarrier();
00059 
00060     MESQUITE_EXPORT virtual std::string get_name() const
00061     {
00062         return "AWMetricBarrier";
00063     }
00064 
00065     static inline bool invalid_determinant( double d )
00066     {
00067         return d < 1e-12;
00068     }
00069 };
00070 
00071 class AWMetricBarrier2D : public AWMetricBarrier
00072 {
00073   public:
00074     MESQUITE_EXPORT virtual ~AWMetricBarrier2D();
00075 
00076     /**\brief Evaluate \f$\mu(A,W)\f$
00077      *
00078      * This method always returns an error for 2D-only metrics
00079      */
00080     MESQUITE_EXPORT virtual bool evaluate( const MsqMatrix< 3, 3 >& A, const MsqMatrix< 3, 3 >& W, double& result,
00081                                            MsqError& err );
00082 };
00083 
00084 class AWMetricBarrier3D : public AWMetricBarrier
00085 {
00086   public:
00087     MESQUITE_EXPORT virtual ~AWMetricBarrier3D();
00088 
00089     /**\brief Evaluate \f$\mu(A,W)\f$
00090      *
00091      * This method always returns an error for 3D-only metrics
00092      */
00093     MESQUITE_EXPORT virtual bool evaluate( const MsqMatrix< 2, 2 >& A, const MsqMatrix< 2, 2 >& W, double& result,
00094                                            MsqError& err );
00095 };
00096 
00097 }  // namespace MBMesquite
00098 
00099 #endif
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