MOAB: Mesh Oriented datABase  (version 5.4.0)
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,
00085                                  ParallelMesh* pmesh,
00086                                  Settings* settings,
00087                                  QualityAssessor* qa,
00088                                  MsqError& err )
00089 {
00090     // Quality Metrics
00091     IdealShapeTarget target;
00092     Mesh* mesh         = mesh_and_domain->get_mesh();
00093     MeshDomain* domain = mesh_and_domain->get_domain();
00094 
00095     // only calc min edge length if user hasn't set the vertex_movement_limit_factor
00096     if( !mBeta )
00097     {
00098         // Calculate minimum edge length in mesh
00099 
00100         // create a temp global patch to get min edge len from
00101         PatchData patch;
00102         patch.set_mesh( mesh );
00103         patch.set_domain( domain );
00104         if( settings ) patch.attach_settings( settings );
00105         std::vector< Mesh::ElementHandle > patch_elems;
00106         std::vector< Mesh::VertexHandle > patch_verts;
00107         mesh->get_all_elements( patch_elems, err );
00108         mesh->get_all_vertices( patch_verts, err );
00109         patch.set_mesh_entities( patch_elems, patch_verts, err );
00110 
00111         // get min edge length from temp global patch
00112         double min_edge_len = 0.0, max_edge_len = 0.0;
00113         patch.get_minmax_edge_length( min_edge_len, max_edge_len );
00114         mBeta = min_edge_len / 10.0;
00115     }
00116 
00117     TerminationCriterion inner_b;
00118 
00119     // check for inverted elements
00120 
00121     // create QualityAssessor instance without a Quality Metric
00122     QualityAssessor check_inverted( false, false );
00123     InstructionQueue q_invert_check;
00124     // a QuallityAssessor without a metric will just check for inverted elements and samples
00125     q_invert_check.add_quality_assessor( &check_inverted, err );
00126     q_invert_check.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00127     int inverted_elems = 0, inverted_samples = 0;
00128     check_inverted.get_inverted_element_count( inverted_elems, inverted_samples, err );
00129     if( inverted_elems || inverted_samples )
00130     {
00131         // use non barrier shape improvement on tangled mesh
00132         TShapeNB1 mu_no;
00133         TQualityMetric metric_no_0( &target, &mu_no );
00134         ElementPMeanP metric_no( 1.0, &metric_no_0 );
00135 
00136         // QualityAssessor
00137         qa->add_quality_assessment( &metric_no );
00138 
00139         PMeanPTemplate obj_func_no( 1.0, &metric_no );
00140         ConjugateGradient improver_no( &obj_func_no );
00141         improver_no.use_global_patch();
00142         TerminationCriterion inner_no;
00143         if( maxTime > 0.0 ) inner_no.add_cpu_time( maxTime );
00144         inner_no.add_absolute_vertex_movement_edge_length( mBeta );
00145         improver_no.set_inner_termination_criterion( &inner_no );
00146         InstructionQueue q_no;
00147         q_no.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00148         q_no.set_master_quality_improver( &improver_no, err );MSQ_ERRRTN( err );
00149         q_no.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00150         q_no.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00151     }
00152     else
00153     {
00154         // use barrer metric on non-tangled mesh
00155 
00156         Timer totalTimer;
00157         TShapeB1 mu_b;
00158         TQualityMetric metric_b_0( &target, &mu_b );
00159         ElementPMeanP metric_b( 1.0, &metric_b_0 );
00160         qa->add_quality_assessment( &metric_b );
00161         PMeanPTemplate obj_func_b( 1.0, &metric_b );
00162         ConjugateGradient improver_b( &obj_func_b );
00163         improver_b.use_global_patch();
00164 
00165         if( maxTime > 0.0 ) inner_b.add_cpu_time( maxTime );
00166         inner_b.add_absolute_vertex_movement_edge_length( mBeta );
00167 
00168         improver_b.set_inner_termination_criterion( &inner_b );
00169         InstructionQueue q_b;
00170         q_b.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00171         q_b.set_master_quality_improver( &improver_b, err );MSQ_ERRRTN( err );
00172         q_b.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
00173         q_b.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
00174     }
00175 }
00176 
00177 }  // namespace MBMesquite
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