Branch data Line data Source code
1 : : /* *****************************************************************
2 : : MESQUITE -- The Mesh Quality Improvement Toolkit
3 : :
4 : : Copyright 2004 Sandia Corporation and Argonne National
5 : : Laboratory. Under the terms of Contract DE-AC04-94AL85000
6 : : with Sandia Corporation, the U.S. Government retains certain
7 : : rights in this software.
8 : :
9 : : This library is free software; you can redistribute it and/or
10 : : modify it under the terms of the GNU Lesser General Public
11 : : License as published by the Free Software Foundation; either
12 : : version 2.1 of the License, or (at your option) any later version.
13 : :
14 : : This library is distributed in the hope that it will be useful,
15 : : but WITHOUT ANY WARRANTY; without even the implied warranty of
16 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 : : Lesser General Public License for more details.
18 : :
19 : : You should have received a copy of the GNU Lesser General Public License
20 : : (lgpl.txt) along with this library; if not, write to the Free Software
21 : : Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 : :
23 : : [email protected], [email protected], [email protected],
24 : : [email protected], [email protected], [email protected]
25 : :
26 : : ***************************************************************** */
27 : : // -*- Mode : c++; tab-width: 3; c-tab-always-indent: t; indent-tabs-mode: nil; c-basic-offset: 3
28 : : // -*-
29 : :
30 : : /*! \file ShapeImprovementWrapper.cpp
31 : :
32 : : Member functions of the MBMesquite::ShapeImprovementWrapper class
33 : :
34 : : \author Michael Brewer
35 : : \date June 6, 2003
36 : : */
37 : :
38 : : #include "InstructionQueue.hpp"
39 : : #include "ShapeImprovementWrapper.hpp"
40 : : #include "MsqTimer.hpp"
41 : : #include "MsqDebug.hpp"
42 : : #include "UntangleBetaQualityMetric.hpp"
43 : : #include "LPtoPTemplate.hpp"
44 : : #include "ConjugateGradient.hpp"
45 : : #include "TerminationCriterion.hpp"
46 : : #include "IdealWeightInverseMeanRatio.hpp"
47 : : #include "FeasibleNewton.hpp"
48 : : #include "InstructionQueue.hpp"
49 : : #include "QualityAssessor.hpp"
50 : :
51 : : namespace MBMesquite
52 : : {
53 : :
54 : : const double DEF_UNT_BETA = 1e-8;
55 : : const double DEF_SUC_EPS = 1e-4;
56 : :
57 : : /*! The consturctor allows for two values. The first is a
58 : : time bound (in seconds) used as a termination criterion. If
59 : : this value is non-positive, no time bound will be set.
60 : : By default, the value is set to zero and no time bound
61 : : is used. The second value is the tolerance for the gradient
62 : : norm termination criteria. The default value is 1.e-6.*/
63 : 0 : ShapeImprovementWrapper::ShapeImprovementWrapper( MsqError&, double cpu_time, double grad_norm,
64 : : int parallel_iterations )
65 : : : maxTime( cpu_time ), gradNorm( grad_norm ), untBeta( DEF_UNT_BETA ), successiveEps( DEF_SUC_EPS ),
66 : 0 : parallelIterations( parallel_iterations )
67 : : {
68 : 0 : }
69 : :
70 : 2 : ShapeImprovementWrapper::ShapeImprovementWrapper( double cpu_time, double grad_norm, int parallel_iterations )
71 : : : maxTime( cpu_time ), gradNorm( grad_norm ), untBeta( DEF_UNT_BETA ), successiveEps( DEF_SUC_EPS ),
72 : 2 : parallelIterations( parallel_iterations )
73 : : {
74 : 2 : }
75 : :
76 : 2 : void ShapeImprovementWrapper::run_wrapper( MeshDomainAssoc* mesh_and_domain, ParallelMesh* pmesh, Settings* settings,
77 : : QualityAssessor* qa, MsqError& err )
78 : : {
79 : : // Define an untangler
80 [ + - ]: 2 : UntangleBetaQualityMetric untangle_metric( untBeta );
81 [ + - ][ + - ]: 4 : LPtoPTemplate untangle_func( 2, &untangle_metric );
82 [ + - ][ + - ]: 4 : ConjugateGradient untangle_global( &untangle_func );
83 [ + - ][ + - ]: 4 : TerminationCriterion untangle_inner, untangle_outer;
[ + - ][ + - ]
[ + - ][ + - ]
84 [ + - ]: 2 : untangle_global.use_global_patch();
85 [ + - ]: 2 : untangle_inner.add_absolute_quality_improvement( 0.0 );
86 [ + - ]: 2 : untangle_inner.add_absolute_successive_improvement( successiveEps );
87 [ + - ]: 2 : untangle_outer.add_iteration_limit( 1 );
88 [ + - ]: 2 : untangle_global.set_inner_termination_criterion( &untangle_inner );
89 [ + - ]: 2 : untangle_global.set_outer_termination_criterion( &untangle_outer );
90 : :
91 : : // define shape improver
92 [ + - ][ + - ]: 4 : IdealWeightInverseMeanRatio inverse_mean_ratio;
93 [ + - ]: 2 : inverse_mean_ratio.set_averaging_method( QualityMetric::LINEAR );
94 [ + - ][ + - ]: 4 : LPtoPTemplate obj_func( 2, &inverse_mean_ratio );
95 [ + - ][ + - ]: 4 : FeasibleNewton feas_newt( &obj_func );
96 [ + - ][ + - ]: 4 : TerminationCriterion term_inner, term_outer;
[ + - ][ + - ]
[ + - ][ + - ]
97 [ + - ]: 2 : feas_newt.use_global_patch();
98 [ + - ]: 2 : qa->add_quality_assessment( &inverse_mean_ratio );
99 [ + - ]: 2 : term_inner.add_absolute_gradient_L2_norm( gradNorm );
100 [ + - ]: 2 : term_inner.add_relative_successive_improvement( successiveEps );
101 [ - + ][ + - ]: 2 : term_outer.add_iteration_limit( pmesh ? parallelIterations : 1 );
102 [ + - ]: 2 : feas_newt.set_inner_termination_criterion( &term_inner );
103 [ + - ]: 2 : feas_newt.set_outer_termination_criterion( &term_outer );
104 : :
105 : : // Apply CPU time limit to untangler
106 [ - + ][ # # ]: 2 : if( maxTime > 0.0 ) untangle_inner.add_cpu_time( maxTime );
107 : :
108 : : // Run untangler
109 [ + - ][ + - ]: 4 : InstructionQueue q1;
110 [ + - ]: 2 : Timer totalTimer;
111 [ + - ][ + - ]: 2 : q1.set_master_quality_improver( &untangle_global, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
112 [ + - ][ + - ]: 2 : q1.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
113 [ + - ][ + - ]: 2 : q1.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
114 : :
115 : : // If limited by CPU time, limit next step to remaning time
116 [ - + ]: 2 : if( maxTime > 0.0 )
117 : : {
118 [ # # ]: 0 : double remaining = maxTime - totalTimer.since_birth();
119 [ # # ]: 0 : if( remaining <= 0.0 )
120 : : {
121 : : MSQ_DBGOUT( 2 ) << "Optimization is terminating without perfoming shape improvement." << std::endl;
122 : 0 : remaining = 0.0;
123 : : }
124 [ # # ]: 0 : term_inner.add_cpu_time( remaining );
125 : : }
126 : :
127 : : // Run shape improver
128 [ + - ][ + - ]: 4 : InstructionQueue q2;
129 [ + - ][ + - ]: 2 : q2.set_master_quality_improver( &feas_newt, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
130 [ + - ][ + - ]: 2 : q2.add_quality_assessor( qa, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
131 [ + - ][ + - ]: 4 : q2.run_common( mesh_and_domain, pmesh, settings, err );MSQ_ERRRTN( err );
[ - + ][ # # ]
[ # # ][ - + ]
[ + - ]
132 : : }
133 : :
134 [ + - ][ + - ]: 8 : } // namespace MBMesquite
|
