QualityMetric/PowerQualityMetric.cpp

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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      
   
  ***************************************************************** */
#include "PowerQualityMetric.hpp"
#include "QualityMetric.hpp"
#include "Vector3D.hpp"
#include "MsqDebug.hpp"

using namespace Mesquite;

PowerQualityMetric::PowerQualityMetric(QualityMetric* qm1,
                                       double pow_factor,
                                       MsqError &err)
  : qualMetric( qm1 ), mPower( pow_factor )
{
  if(qm1 == NULL){
    MSQ_SETERR(err)("PowerQualityMetric constructor passed NULL pointer.",
                    MsqError::INVALID_ARG);
    return;
  }
  feasible=qm1->get_feasible_constraint();
  int n_flag=qm1->get_negate_flag();
    //If the power is negative, then negate flag needs
    //to be (-n_flag).  If the power is very, very small
    //then we just set an error.
  if(fabs(pow_factor)<MSQ_MIN)
  {
    MSQ_SETERR(err)("PowerQualityMetric passed a double smaller than "
                    "Mesquite's minimum.", MsqError::INVALID_ARG);
    return;
  }
  else if(pow_factor<0)
  {
    n_flag=(-n_flag);
  }
    
  set_negate_flag(n_flag);
  
  set_metric_type(qm1->get_metric_type());
  
  set_name("Composite Power");
}

bool PowerQualityMetric::evaluate_element(PatchData& pd,
                                          MsqMeshEntity *element,
                                          double &value,
                                          MsqError &err)
{
  bool valid_flag;
  double metric1;
  valid_flag=qualMetric->evaluate_element(pd, element, metric1, err); MSQ_ERRZERO(err);
  if(!valid_flag)
    return false;
  value = pow(metric1,mPower);
  return valid_flag;
}

bool PowerQualityMetric::evaluate_vertex(PatchData& pd,
                                            MsqVertex* vert,
                                            double &value,
                                            MsqError& err)
{
  bool valid_flag;
  double metric1;
  valid_flag=qualMetric->evaluate_vertex(pd, vert, metric1, err); MSQ_ERRZERO(err);
  if(!valid_flag)
    return false;
  value = pow(metric1,mPower);
  return valid_flag;
}