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 IdealWeightMeanRatio.hpp
31 : :
32 : : Header file for the MBMesquite::IdealWeightMeanRatio class
33 : :
34 : : \author Michael Brewer
35 : : \author Todd Munson
36 : : \date 2002-11-11
37 : : */
38 : :
39 : : #ifndef IdealWeightMeanRatio_hpp
40 : : #define IdealWeightMeanRatio_hpp
41 : :
42 : : #include "Mesquite.hpp"
43 : : #include "MsqError.hpp"
44 : : #include "ElementQM.hpp"
45 : : #include "AveragingQM.hpp"
46 : : #include "Vector3D.hpp"
47 : : #include "Matrix3D.hpp"
48 : : #include "Exponent.hpp"
49 : :
50 : : namespace MBMesquite
51 : : {
52 : : /*! \class IdealWeightMeanRatio
53 : : \brief Computes the mean ratio quality metric
54 : : of given element.
55 : :
56 : : The metric does not use the sample point functionality or the
57 : : compute_weighted_jacobian. It evaluates the metric at
58 : : the element vertices, and uses the isotropic ideal element.
59 : : It does require a feasible region, and the metric needs
60 : : to be maximized.
61 : : */
62 : : class IdealWeightMeanRatio : public ElementQM, public AveragingQM
63 : : {
64 : : public:
65 : 2 : MESQUITE_EXPORT IdealWeightMeanRatio()
66 : : : AveragingQM( QualityMetric::LINEAR ), a2Con( 2.0 ), b2Con( -1.0 ), c2Con( 1.0 ), a3Con( 3.0 ), b3Con( -1.0 ),
67 [ + - ][ + - ]: 234 : c3Con( 2.0 / 3.0 )
[ + + ][ + - ]
[ + + ][ + - ]
[ + + ][ + - ]
[ + - ][ + - ]
[ + - # #
# # # # ]
68 : : {
69 [ # # ]: 2 : }
70 : :
71 : : //! virtual destructor ensures use of polymorphism during destruction
72 [ + - ][ + + ]: 164 : MESQUITE_EXPORT virtual ~IdealWeightMeanRatio() {}
[ - + ]
73 : :
74 : : virtual std::string get_name() const;
75 : :
76 : : //! 1 if metric should be minimized, -1 if metric should be maximized.
77 : : virtual int get_negate_flag() const;
78 : :
79 : : virtual bool evaluate( PatchData& pd, size_t handle, double& value, MsqError& err );
80 : :
81 : : virtual bool evaluate_with_gradient( PatchData& pd, size_t handle, double& value, std::vector< size_t >& indices,
82 : : std::vector< Vector3D >& gradient, MsqError& err );
83 : :
84 : : virtual bool evaluate_with_Hessian_diagonal( PatchData& pd, size_t handle, double& value,
85 : : std::vector< size_t >& indices, std::vector< Vector3D >& gradient,
86 : : std::vector< SymMatrix3D >& Hessian, MsqError& err );
87 : :
88 : : virtual bool evaluate_with_Hessian( PatchData& pd, size_t handle, double& value, std::vector< size_t >& indices,
89 : : std::vector< Vector3D >& gradient, std::vector< Matrix3D >& Hessian,
90 : : MsqError& err );
91 : :
92 : : private:
93 : : // arrays used in Hessian computations
94 : : // We allocate them here, so that one allocation only is done.
95 : : // This gives a big computation speed increase.
96 : : Vector3D mCoords[4]; // Vertex coordinates for the (decomposed) elements
97 : : Vector3D mGradients[32]; // Gradient of metric with respect to the coords
98 : : Matrix3D mHessians[80]; // Hessian of metric with respect to the coords
99 : : double mMetrics[8]; // Metric values for the (decomposed) elements
100 : :
101 : : const double a2Con;
102 : : const Exponent b2Con;
103 : : const Exponent c2Con;
104 : :
105 : : const double a3Con;
106 : : const Exponent b3Con;
107 : : const Exponent c3Con;
108 : : };
109 : : } // namespace MBMesquite
110 : :
111 : : #endif // IdealWeightMeanRatio_hpp
|
