MOAB: Mesh Oriented datABase  (version 5.2.1)
ShapeImprover.cpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2010 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     (2010) kraftche@cae.wisc.edu
00024 
00025   ***************************************************************** */
00026 
00027 /** \file ShapeImprover.cpp
00028  *  \brief
00029  *  \author Jason Kraftcheck
00030  *  \author Boyd Tidwell
00031  *  \date   10-23-12
00032  */
00033 
00034 #include "ShapeImprover.hpp"
00035 #include "MsqTimer.hpp"
00036 #include "MsqDebug.hpp"
00037 #include "PMeanPTemplate.hpp"
00038 #include "ElementPMeanP.hpp"
00039 #include "ConjugateGradient.hpp"
00040 #include "TerminationCriterion.hpp"
00041 #include "InstructionQueue.hpp"
00042 #include "QualityAssessor.hpp"
00043 #include "ElementPatches.hpp"
00044 
00045 #include "TShapeB1.hpp"
00046 #include "TShapeNB1.hpp"
00047 #include "TQualityMetric.hpp"
00048 #include "IdealShapeTarget.hpp"
00049 
00050 namespace MBMesquite
00051 {
00052 
00053 const double DEFAULT_BETA             = 0.0;
00054 const int DEFUALT_PARALLEL_ITERATIONS = 10;
00055 
00056 ShapeImprover::ShapeImprover()
00057     : maxTime( 300.0 ), mBeta( DEFAULT_BETA ), parallelIterations( DEFUALT_PARALLEL_ITERATIONS )
00058 {
00059 }
00060 
00061 void ShapeImprover::set_vertex_movement_limit_factor( double beta )
00062 {
00063     assert( beta > 0.0 );
00064     assert( beta < 1.0 );
00065     mBeta = beta;
00066 }
00067 
00068 void ShapeImprover::set_cpu_time_limit( double limit )
00069 {
00070     assert( limit >= 0.0 );
00071     maxTime = limit;
00072 }
00073 
00074 void ShapeImprover::set_parallel_iterations( int count )
00075 {
00076     if( count < 1 )
00077     {
00078         assert( false );
00079         count = 1;
00080     }
00081     parallelIterations = count;
00082 }
00083 
00084 void ShapeImprover::run_wrapper( MeshDomainAssoc* mesh_and_domain, ParallelMesh* pmesh, Settings* settings,
00085                                  QualityAssessor* qa, MsqError& err )
00086 {
00087     // Quality Metrics
00088     IdealShapeTarget target;
00089     Mesh* mesh         = mesh_and_domain->get_mesh();
00090     MeshDomain* domain = mesh_and_domain->get_domain();
00091 
00092     // only calc min edge length if user hasn't set the vertex_movement_limit_factor
00093     if( !mBeta )
00094     {
00095         // Calculate minimum edge length in mesh
00096 
00097         // create a temp global patch to get min edge len from
00098         PatchData patch;
00099         patch.set_mesh( mesh );
00100         patch.set_domain( domain );
00101         if( settings ) patch.attach_settings( settings );
00102         std::vector< Mesh::ElementHandle > patch_elems;
00103         std::vector< Mesh::VertexHandle > patch_verts;
00104         mesh->get_all_elements( patch_elems, err );
00105         mesh->get_all_vertices( patch_verts, err );
00106         patch.set_mesh_entities( patch_elems, patch_verts, err );
00107 
00108         // get min edge length from temp global patch
00109         double min_edge_len = 0.0, max_edge_len = 0.0;
00110         patch.get_minmax_edge_length( min_edge_len, max_edge_len );
00111         mBeta = min_edge_len / 10.0;
00112     }
00113 
00114     TerminationCriterion inner_b;
00115 
00116     // check for inverted elements
00117 
00118     // create QualityAssessor instance without a Quality Metric
00119     QualityAssessor check_inverted( false, false );
00120     InstructionQueue q_invert_check;
00121     // a QuallityAssessor without a metric will just check for inverted elements and samples
00122     q_invert_check.add_quality_assessor( &check_inverted, err );
00123     q_invert_check.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00124     int inverted_elems = 0, inverted_samples = 0;
00125     check_inverted.get_inverted_element_count( inverted_elems, inverted_samples, err );
00126     if( inverted_elems || inverted_samples )
00127     {
00128         // use non barrier shape improvement on tangled mesh
00129         TShapeNB1 mu_no;
00130         TQualityMetric metric_no_0( &target, &mu_no );
00131         ElementPMeanP metric_no( 1.0, &metric_no_0 );
00132 
00133         // QualityAssessor
00134         qa->add_quality_assessment( &metric_no );
00135 
00136         PMeanPTemplate obj_func_no( 1.0, &metric_no );
00137         ConjugateGradient improver_no( &obj_func_no );
00138         improver_no.use_global_patch();
00139         TerminationCriterion inner_no;
00140         if( maxTime > 0.0 ) inner_no.add_cpu_time( maxTime );
00141         inner_no.add_absolute_vertex_movement_edge_length( mBeta );
00142         improver_no.set_inner_termination_criterion( &inner_no );
00143         InstructionQueue q_no;
00144         q_no.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00145         q_no.set_master_quality_improver( &improver_no, err );MSQ_ERRRTN( err );
00146         q_no.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00147         q_no.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00148     }
00149     else
00150     {
00151         // use barrer metric on non-tangled mesh
00152 
00153         Timer totalTimer;
00154         TShapeB1 mu_b;
00155         TQualityMetric metric_b_0( &target, &mu_b );
00156         ElementPMeanP metric_b( 1.0, &metric_b_0 );
00157         qa->add_quality_assessment( &metric_b );
00158         PMeanPTemplate obj_func_b( 1.0, &metric_b );
00159         ConjugateGradient improver_b( &obj_func_b );
00160         improver_b.use_global_patch();
00161 
00162         if( maxTime > 0.0 ) inner_b.add_cpu_time( maxTime );
00163         inner_b.add_absolute_vertex_movement_edge_length( mBeta );
00164 
00165         improver_b.set_inner_termination_criterion( &inner_b );
00166         InstructionQueue q_b;
00167         q_b.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00168         q_b.set_master_quality_improver( &improver_b, err );MSQ_ERRRTN( err );
00169         q_b.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00170         q_b.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00171     }
00172 }
00173 
00174 }  // namespace MBMesquite
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