MOAB: Mesh Oriented datABase  (version 5.4.0)
JacobianCalculator.cpp
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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 JacobianCalculator.cpp
00028  *  \brief
00029  *  \author Jason Kraftcheck
00030  */
00031 
00032 #include "Mesquite.hpp"
00033 #include "JacobianCalculator.hpp"
00034 #include "MappingFunction.hpp"
00035 #include "MsqError.hpp"
00036 #include "TopologyInfo.hpp"
00037 
00038 namespace MBMesquite
00039 {
00040 
00041 void JacobianCalculator::get_Jacobian_2D( const MappingFunction2D* mf,
00042                                           NodeSet ho_bits,
00043                                           Sample location,
00044                                           const Vector3D* verts,
00045                                           size_t num_type_vert,
00046                                           MsqMatrix< 3, 2 >& J_out,
00047                                           MsqError& err )
00048 {
00049     size_t num_vtx = 0;
00050     mf->derivatives( location, ho_bits, mIndices, mDerivs2D, num_vtx, err );MSQ_ERRRTN( err );
00051     mf->convert_connectivity_indices( num_type_vert, mIndices, num_vtx, err );MSQ_ERRRTN( err );
00052     const MsqVector< 2 >* d = mDerivs2D;
00053     const size_t* const e   = mIndices + num_vtx;
00054     Vector3D c[2]           = { Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ) };
00055     for( const size_t* i = mIndices; i != e; ++i, ++d )
00056     {
00057         c[0] += ( *d )[0] * verts[*i];
00058         c[1] += ( *d )[1] * verts[*i];
00059     }
00060     J_out.set_column( 0, MsqMatrix< 3, 1 >( c[0].to_array() ) );
00061     J_out.set_column( 1, MsqMatrix< 3, 1 >( c[1].to_array() ) );
00062 }
00063 
00064 void JacobianCalculator::get_Jacobian_3D( const MappingFunction3D* mf,
00065                                           NodeSet ho_bits,
00066                                           Sample location,
00067                                           const Vector3D* verts,
00068                                           size_t num_type_vert,
00069                                           MsqMatrix< 3, 3 >& J_out,
00070                                           MsqError& err )
00071 {
00072     size_t num_vtx = 0;
00073     mf->derivatives( location, ho_bits, mIndices, mDerivs3D, num_vtx, err );MSQ_ERRRTN( err );
00074     mf->convert_connectivity_indices( num_type_vert, mIndices, num_vtx, err );MSQ_ERRRTN( err );
00075     const MsqVector< 3 >* d = mDerivs3D;
00076     const size_t* const e   = mIndices + num_vtx;
00077     Vector3D c[3]           = { Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ) };
00078     for( const size_t* i = mIndices; i != e; ++i, ++d )
00079     {
00080         c[0] += ( *d )[0] * verts[*i];
00081         ;
00082         c[1] += ( *d )[1] * verts[*i];
00083         ;
00084         c[2] += ( *d )[2] * verts[*i];
00085         ;
00086     }
00087     J_out.set_column( 0, MsqMatrix< 3, 1 >( c[0].to_array() ) );
00088     J_out.set_column( 1, MsqMatrix< 3, 1 >( c[1].to_array() ) );
00089     J_out.set_column( 2, MsqMatrix< 3, 1 >( c[2].to_array() ) );
00090 }
00091 
00092 }  // namespace MBMesquite
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