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MultiSphereBL.H

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/* _______              __
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*/
//
// This software is copyright (C) by the Lawrence Berkeley
// National Laboratory.  Permission is granted to reproduce
// this software for non-commercial purposes provided that
// this notice is left intact.
// 
// It is acknowledged that the U.S. Government has rights to
// this software under Contract DE-AC03-765F00098 between
// the U.S.  Department of Energy and the University of
// California.
//
// This software is provided as a professional and academic
// contribution for joint exchange. Thus it is experimental,
// is provided ``as is'', with no warranties of any kind
// whatsoever, no support, no promise of updates, or printed
// documentation. By using this software, you acknowledge
// that the Lawrence Berkeley National Laboratory and
// Regents of the University of California shall have no
// liability with respect to the infringement of other
// copyrights by any part of this software.
//
//  ANAG, LBNL, DTG

#ifndef _MultiSphereBL_H_
#define _MultiSphereBL_H_

#include "MayDay.H"
#include "LoHiSide.H"
#include "IntVect.H"
#include "RealVect.H"
#include "BaseLevelSet.H"
#include "REAL.H"
#include "BoxIterator.H"
using std::pair;

/*
  This is the workshop class for a Sphere.
  It follows the BaseLocalGeometry base class.
  Returns C_z+sqrt (radius-(x-C_x)squared+(y-C_y)squared));
*/
class MultiSphereBL: public BaseLevelSet
{
public:

  MultiSphereBL(const Vector<Real>&     a_radius, 
                const Vector<RealVect>& a_center,
                const Real&             a_dx);

  virtual ~MultiSphereBL();

  
  /*
    Return true if every cell in region is regular at the
    refinement described by dx.
  */
  virtual bool isRegular(const Box&      region,
                         const Box&      domain,
                         const RealVect& origin,
                         const Real&     dx) const;

  /* 
     Return true if every cell in region is covered at the
     refinement described by dx.
  */
  virtual bool isCovered(const Box&           region,
                         const Box&           domain,
                         const RealVect&      origin,
                         const Real&          dx) const;

  /*
    This returns the signed integer which  most closely
    represents the normal direction.  The first integer
    of the pair is of the interface at an irregular cell
    (which coordinate direction has the largest normal component). 
    This will only be called if the cell is irregular.
  */
  virtual
  pair<int, Side::LoHiSide>  
  upDirection(const RealVect& a_midpt,const IntVect& a_iv)  const; 

  
  //     Return the value at the dependent coordinate given the independent
  //  coordinates. Returns C_z+sqrt (radius-(x-C_x)squared+(y-C_y)squared));
  //  Where the center is (C_x,C_y,C_z)
   
  
  virtual Real localFuncValue(const RealVect& a_independentCoords, 
                              const int& a_upDirection,
                              const IntVect& a_iv, 
                              const Box& a_domain, 
                              const RealVect& a_origin, 
                              const Real& a_dx) const;  

 
  
  //   Return a newly allocated derived class.  The responsibility
  //  for deleting the memory is left to the calling function.
  
  virtual
  BaseLevelSet* new_baseLevelSet() const;   
  // calculates the max coordiante of a RealVect
  virtual Real max(const RealVect& vec)const;
  // calculates the magnitude of a RealVect
  virtual Real magnitude(const RealVect& vec)const;
 
  int closestSphere(const RealVect& a_vec) const;
protected:
  
  Vector<RealVect> m_center;
  Vector<Real>     m_radius;
  Real m_dx;
  int m_numSpheres;


private:
  MultiSphereBL()
  {
    MayDay::Error("MultiSphereBL uses strong construction");
  }
  MultiSphereBL(const MultiSphereBL& a_radius)
  {
    MayDay::Error("sphereBaselevel disallows copy construction");
  }
  void operator=(const MultiSphereBL& a_radius)
  {
    MayDay::Error("MultiSphereBL disallows assignment");
  }

};
#endif

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