FuncHeaviside.h

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// Gmsh - Copyright (C) 1997-2022 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file in the Gmsh root directory for license information.
// Please report all issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
//
// Contributor(s):
//   Boris Sedji
//
 
#ifndef FUNCHEAVISIDE_H
#define FUNCHEAVISIDE_H
 
#include "simpleFunction.h"
#include "gmshLevelset.h"
 
class FuncHeaviside : public simpleFunctionOnElement<double> {
private:
  gLevelset *_ls;
 
public:
  FuncHeaviside(gLevelset *ls) : _ls(ls) {}
  virtual double operator()(double x, double y, double z) const
  {
    if(_ls->isInsideDomain(x, y, z))
      return 1;
    else
      return -1;
  }
  virtual double operator()(double x, double y, double z, MElement *e) const
  {
    if(_ls->isInsideDomain(x, y, z))
      return 1;
    else
      return -1;
  }
  virtual void gradient(double x, double y, double z, double &dfdx,
                        double &dfdy, double &dfdz) const
  {
    dfdx = dfdy = dfdz = 0.0;
  }
  virtual void gradient(double x, double y, double z, double &dfdx,
                        double &dfdy, double &dfdz, MElement *e) const
  {
    dfdx = dfdy = dfdz = 0.0;
  }
};
 
#endif