MOAB: Mesh Oriented datABase  (version 5.2.1)
JacobianCalculator.cpp
Go to the documentation of this file.
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, NodeSet ho_bits, Sample location,
00042                                           const Vector3D* verts, size_t num_type_vert, MsqMatrix< 3, 2 >& J_out,
00043                                           MsqError& err )
00044 {
00045     size_t num_vtx = 0;
00046     mf->derivatives( location, ho_bits, mIndices, mDerivs2D, num_vtx, err );MSQ_ERRRTN( err );
00047     mf->convert_connectivity_indices( num_type_vert, mIndices, num_vtx, err );MSQ_ERRRTN( err );
00048     const MsqVector< 2 >* d = mDerivs2D;
00049     const size_t* const e   = mIndices + num_vtx;
00050     Vector3D c[2]           = { Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ) };
00051     for( const size_t* i = mIndices; i != e; ++i, ++d )
00052     {
00053         c[0] += ( *d )[0] * verts[*i];
00054         c[1] += ( *d )[1] * verts[*i];
00055     }
00056     J_out.set_column( 0, MsqMatrix< 3, 1 >( c[0].to_array() ) );
00057     J_out.set_column( 1, MsqMatrix< 3, 1 >( c[1].to_array() ) );
00058 }
00059 
00060 void JacobianCalculator::get_Jacobian_3D( const MappingFunction3D* mf, NodeSet ho_bits, Sample location,
00061                                           const Vector3D* verts, size_t num_type_vert, MsqMatrix< 3, 3 >& J_out,
00062                                           MsqError& err )
00063 {
00064     size_t num_vtx = 0;
00065     mf->derivatives( location, ho_bits, mIndices, mDerivs3D, num_vtx, err );MSQ_ERRRTN( err );
00066     mf->convert_connectivity_indices( num_type_vert, mIndices, num_vtx, err );MSQ_ERRRTN( err );
00067     const MsqVector< 3 >* d = mDerivs3D;
00068     const size_t* const e   = mIndices + num_vtx;
00069     Vector3D c[3]           = { Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ), Vector3D( 0, 0, 0 ) };
00070     for( const size_t* i = mIndices; i != e; ++i, ++d )
00071     {
00072         c[0] += ( *d )[0] * verts[*i];
00073         ;
00074         c[1] += ( *d )[1] * verts[*i];
00075         ;
00076         c[2] += ( *d )[2] * verts[*i];
00077         ;
00078     }
00079     J_out.set_column( 0, MsqMatrix< 3, 1 >( c[0].to_array() ) );
00080     J_out.set_column( 1, MsqMatrix< 3, 1 >( c[1].to_array() ) );
00081     J_out.set_column( 2, MsqMatrix< 3, 1 >( c[2].to_array() ) );
00082 }
00083 
00084 }  // namespace MBMesquite
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines