MOAB: Mesh Oriented datABase  (version 5.2.1)
EdgeLengthQualityMetric.cpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2004 Sandia Corporation and Argonne National
00005     Laboratory.  Under the terms of Contract DE-AC04-94AL85000
00006     with Sandia Corporation, the U.S. Government retains certain
00007     rights in 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     diachin2@llnl.gov, djmelan@sandia.gov, mbrewer@sandia.gov,
00024     pknupp@sandia.gov, tleurent@mcs.anl.gov, tmunson@mcs.anl.gov
00025 
00026   ***************************************************************** */
00027 /*! \file EdgeLengthQualityMetric.cpp
00028   \author Michael Brewer
00029   \date 2002-05-14
00030   Evaluates the lengths of the edges attached to the given vertex.
00031   By default, the averaging method is set to SUM.
00032 */
00033 
00034 #include "EdgeLengthQualityMetric.hpp"
00035 #include "Vector3D.hpp"
00036 #include "QualityMetric.hpp"
00037 #include "MsqVertex.hpp"
00038 #include "PatchData.hpp"
00039 #include "MsqError.hpp"
00040 
00041 #include <cmath>
00042 
00043 using namespace MBMesquite;
00044 
00045 std::string EdgeLengthQualityMetric::get_name() const
00046 {
00047     return "Edge Length";
00048 }
00049 
00050 int EdgeLengthQualityMetric::get_negate_flag() const
00051 {
00052     return 1;
00053 }
00054 
00055 bool EdgeLengthQualityMetric::evaluate_common( PatchData& pd, size_t this_vert, double& fval,
00056                                                std::vector< size_t >& adj_verts, MsqError& err )
00057 {
00058     fval = 0.0;
00059     pd.get_adjacent_vertex_indices( this_vert, adj_verts, err );
00060     MSQ_ERRZERO( err );
00061     const unsigned num_sample_points = adj_verts.size();
00062     double* metric_values            = new double[num_sample_points];
00063     const MsqVertex* verts           = pd.get_vertex_array( err );
00064     MSQ_ERRZERO( err );
00065     for( unsigned i = 0; i < num_sample_points; ++i )
00066         metric_values[i] = ( verts[this_vert] - verts[adj_verts[i]] ).length();
00067     fval = average_metrics( metric_values, num_sample_points, err );
00068     delete[] metric_values;
00069     return !MSQ_CHKERR( err );
00070 }
00071 
00072 bool EdgeLengthQualityMetric::evaluate( PatchData& pd, size_t vertex, double& value, MsqError& err )
00073 {
00074     std::vector< size_t > verts;
00075     bool rval = evaluate_common( pd, vertex, value, verts, err );
00076     return !MSQ_CHKERR( err ) && rval;
00077 }
00078 
00079 bool EdgeLengthQualityMetric::evaluate_with_indices( PatchData& pd, size_t vertex, double& value,
00080                                                      std::vector< size_t >& indices, MsqError& err )
00081 {
00082     indices.clear();
00083     bool rval = evaluate_common( pd, vertex, value, indices, err );
00084 
00085     std::vector< size_t >::iterator r, w;
00086     for( r = w = indices.begin(); r != indices.end(); ++r )
00087     {
00088         if( *r < pd.num_free_vertices() )
00089         {
00090             *w = *r;
00091             ++w;
00092         }
00093     }
00094     indices.erase( w, indices.end() );
00095     if( vertex < pd.num_free_vertices() ) indices.push_back( vertex );
00096 
00097     return !MSQ_CHKERR( err ) && rval;
00098 }
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