---

DerivStencil Class Reference

class to encapsulate the operations to create derivs on irreg stencils More...

#include <DerivStencil.H>

Collaboration diagram for DerivStencil:

[legend]List of all members.

Public Methods
void	define ()
bool	isDefined () const
	DerivStencil ()
	DerivStencil (const DerivStencil &a_dsin)
	~DerivStencil ()
void	clear ()
int	size () const
const IntVect &	getIndex (int a_ivec) const
const Real &	getWeight (int a_ivec) const
void	accumulate (const IntVect &a_iv, Real a_weight)
const DerivStencil &	operator= (const DerivStencil &a_dsin)
const DerivStencil &	operator *= (Real a_facin)
const DerivStencil &	operator/= (Real a_denom)
const DerivStencil &	operator+= (Real a_facin)
const DerivStencil &	operator-= (Real a_facin)
Protected Attributes
Vector< IntVect >	m_vectIV
Vector< Real >	m_vectWgt
bool	isdefined

---

Detailed Description

class to encapsulate the operations to create derivs on irreg stencils

DerivStencil is meant to be used to encapsulate the information necessary to take finite difference derivatives at a point in space. Every point in the stencil has a weight. You add them (the boxarrayindex and the weight) at the same time and you can manipulate the weights enmasse by real number operations. Stencils may not interact with each other with the same sort of arithmetic because that would bring up issues as to what to do when there is incomplete intersection between the stencils.

---

Constructor & Destructor Documentation

DerivStencil::DerivStencil (    )

default constructor; creates empty vectors

DerivStencil::DerivStencil (  const DerivStencil &    a_dsin )

copy constructor; sets *this = a_dsin

DerivStencil::~DerivStencil (    )

---

Member Function Documentation

void DerivStencil::accumulate (  const IntVect &    a_iv, Real    a_weight )

add another set if the IntVect is not in the stencil already. \ Add the weight to the existing weight otherwise**

void DerivStencil::clear (    )

make derivstencil empty

void DerivStencil::define (    )

const IntVect& DerivStencil::getIndex (  int    a_ivec )  const

get iv at ivec

const Real& DerivStencil::getWeight (  int    a_ivec )  const

get weight at ivec

bool DerivStencil::isDefined (    )  const [inline]

return true if any define function been called.

const DerivStencil& DerivStencil::operator *= (  Real    a_facin )

Multiply each weight by a_facin does nothing if vectors are of zero length

const DerivStencil& DerivStencil::operator+= (  Real    a_facin )

add a_facin to each weight does nothing if vectors are of zero length

const DerivStencil& DerivStencil::operator-= (  Real    a_facin )

subtract a_facin from each weight does nothing if vectors are of zero length

const DerivStencil& DerivStencil::operator/= (  Real    a_denom )

divide each weight by a_denom does nothing if vectors are of zero length. Be advised --- This function does no checking to see if a_denom is close to zero.

const DerivStencil& DerivStencil::operator= (  const DerivStencil &    a_dsin )

assignment operator

int DerivStencil::size (    )  const

return length of vectors

---

Member Data Documentation

bool DerivStencil::isdefined [protected]

Vector<IntVect> DerivStencil::m_vectIV [protected]

Vector<Real> DerivStencil::m_vectWgt [protected]

---

The documentation for this class was generated from the following file:

• DerivStencil.H

---