MOAB: Mesh Oriented datABase  (version 5.4.0)
LambdaTarget.cpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2009 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     (2009) kraftche@cae.wisc.edu
00024 
00025   ***************************************************************** */
00026 
00027 /** \file LambdaTarget.cpp
00028  *  \brief
00029  *  \author Jason Kraftcheck
00030  */
00031 
00032 #include "Mesquite.hpp"
00033 #include "LambdaTarget.hpp"
00034 #include "MsqMatrix.hpp"
00035 #include "MsqError.hpp"
00036 
00037 namespace MBMesquite
00038 {
00039 
00040 LambdaTarget::LambdaTarget( TargetCalculator* lambda_source, TargetCalculator* composite_source )
00041     : lambdaSource( lambda_source ), compositeSource( composite_source )
00042 {
00043 }
00044 
00045 LambdaTarget::~LambdaTarget() {}
00046 
00047 bool LambdaTarget::get_3D_target( PatchData& pd,
00048                                   size_t element,
00049                                   Sample sample,
00050                                   MsqMatrix< 3, 3 >& W_out,
00051                                   MsqError& err )
00052 {
00053     bool valid = lambdaSource->get_3D_target( pd, element, sample, W_out, err );
00054     if( MSQ_CHKERR( err ) && !valid ) return false;
00055     double det1 = det( W_out );
00056 
00057     valid = compositeSource->get_3D_target( pd, element, sample, W_out, err );
00058     if( MSQ_CHKERR( err ) && !valid ) return false;
00059     double det2 = det( W_out );
00060 
00061     if( det2 < 1e-15 ) return false;
00062 
00063     W_out *= MBMesquite::cbrt( fabs( det1 / det2 ) );
00064     return true;
00065 }
00066 
00067 bool LambdaTarget::get_2D_target( PatchData& pd,
00068                                   size_t element,
00069                                   Sample sample,
00070                                   MsqMatrix< 2, 2 >& W_out,
00071                                   MsqError& err )
00072 {
00073     bool valid = lambdaSource->get_2D_target( pd, element, sample, W_out, err );
00074     if( MSQ_CHKERR( err ) && !valid ) return false;
00075     double det1 = det( W_out );
00076 
00077     valid = compositeSource->get_2D_target( pd, element, sample, W_out, err );
00078     if( MSQ_CHKERR( err ) && !valid ) return false;
00079     double det2 = det( W_out );
00080 
00081     if( det2 < 1e-15 ) return false;
00082 
00083     W_out *= sqrt( det1 / det2 );
00084     return true;
00085 }
00086 
00087 bool LambdaTarget::get_surface_target( PatchData& pd,
00088                                        size_t element,
00089                                        Sample sample,
00090                                        MsqMatrix< 3, 2 >& W_out,
00091                                        MsqError& err )
00092 {
00093     bool valid = lambdaSource->get_surface_target( pd, element, sample, W_out, err );
00094     if( MSQ_CHKERR( err ) && !valid ) return false;
00095     MsqVector< 3 > cross = W_out.column( 0 ) * W_out.column( 1 );
00096     double det1          = cross % cross;  // length squared
00097 
00098     valid = compositeSource->get_surface_target( pd, element, sample, W_out, err );
00099     if( MSQ_CHKERR( err ) && !valid ) return false;
00100     cross       = W_out.column( 0 ) * W_out.column( 1 );
00101     double det2 = cross % cross;  // length squared
00102 
00103     if( det2 < 1e-15 ) return false;
00104 
00105     W_out *= sqrt( sqrt( det1 / det2 ) );
00106     return true;
00107 }
00108 
00109 }  // namespace MBMesquite
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