/usr/include/trilinos/IdealWeightInverseMeanRatio.hpp is in libtrilinos-dev 10.4.0.dfsg-1ubuntu2.
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MESQUITE -- The Mesh Quality Improvement Toolkit
Copyright 2004 Sandia Corporation and Argonne National
Laboratory. Under the terms of Contract DE-AC04-94AL85000
with Sandia Corporation, the U.S. Government retains certain
rights in this software.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
(lgpl.txt) along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
diachin2@llnl.gov, djmelan@sandia.gov, mbrewer@sandia.gov,
pknupp@sandia.gov, tleurent@mcs.anl.gov, tmunson@mcs.anl.gov
***************************************************************** */
// -*- Mode : c++; tab-width: 3; c-tab-always-indent: t; indent-tabs-mode: nil; c-basic-offset: 3 -*-
/*! \file IdealWeightInverseMeanRatio.hpp
Header file for the Mesquite::IdealWeightInverseMeanRatio class
\author Michael Brewer
\author Thomas Leurent
\date 2002-06-19
*/
#ifndef IdealWeightInverseMeanRatio_hpp
#define IdealWeightInverseMeanRatio_hpp
#include "Mesquite.hpp"
#include "ElementQM.hpp"
#include "AveragingQM.hpp"
#include "Vector3D.hpp"
#include "Matrix3D.hpp"
#include "Exponent.hpp"
namespace MESQUITE_NS
{
class MsqMeshEntity;
class PatchData;
class MsqError;
/*! \class IdealWeightInverseMeanRatio
\brief Computes the inverse mean ratio of given element.
The metric does not use the sample point functionality or the
compute_weighted_jacobian. It evaluates the metric at
the element vertices, and uses the isotropic ideal element.
Optionally, the metric computation can be raised to the
'pow_dbl' power. This does not necessarily raise the metric
value to the 'pow_dbl' power but instead raises each local
metric. For example, if the corner inverse mean ratios of a quadraliteral
element were m1,m2,m3, and m4 and we set pow_dbl=2 and
used linear averaging, the metric value would then be
m = .25(m1*m1 + m2*m2 + m3*m3 + m4*m4). The metric does
require a feasible region, and the metric needs to be minimized
if pow_dbl is greater than zero and maximized if pow_dbl
is less than zero. pow_dbl being equal to zero is invalid.
*/
class IdealWeightInverseMeanRatio : public ElementQM, public AveragingQM
{
public:
MESQUITE_EXPORT IdealWeightInverseMeanRatio(MsqError& err, double power = 1.0);
MESQUITE_EXPORT IdealWeightInverseMeanRatio();
//! virtual destructor ensures use of polymorphism during destruction
MESQUITE_EXPORT virtual ~IdealWeightInverseMeanRatio() {
}
virtual std::string get_name() const;
//! 1 if metric should be minimized, -1 if metric should be maximized.
virtual int get_negate_flag() const;
virtual
bool evaluate( PatchData& pd,
size_t handle,
double& value,
MsqError& err );
virtual
bool evaluate_with_gradient( PatchData& pd,
size_t handle,
double& value,
std::vector<size_t>& indices,
std::vector<Vector3D>& gradient,
MsqError& err );
virtual
bool evaluate_with_Hessian_diagonal( PatchData& pd,
size_t handle,
double& value,
std::vector<size_t>& indices,
std::vector<Vector3D>& gradient,
std::vector<SymMatrix3D>& Hessian,
MsqError& err );
virtual
bool evaluate_with_Hessian( PatchData& pd,
size_t handle,
double& value,
std::vector<size_t>& indices,
std::vector<Vector3D>& gradient,
std::vector<Matrix3D>& Hessian,
MsqError& err );
private:
//! Sets the power value in the metric computation.
void set_metric_power(double pow_dbl, MsqError& err);
// arrays used in Hessian computations
// We allocate them here, so that one allocation only is done.
// This gives a big computation speed increase.
Vector3D mCoords[4]; // Vertex coordinates for the (decomposed) elements
Vector3D mGradients[32]; // Gradient of metric with respect to the coords
Matrix3D mHessians[80]; // Hessian of metric with respect to the coords
double mMetrics[8]; // Metric values for the (decomposed) elements
//variables used in the definition of the metric (2d and 3d)
double a2Con;
Exponent b2Con;
Exponent c2Con;
double a3Con;
Exponent b3Con;
Exponent c3Con;
};
} //namespace
#endif // IdealWeightInverseMeanRatio_hpp
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