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DerivStencil Class Reference

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

#include <DerivStencil.H>

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Public Methods

void define ()
bool isDefined () const
 DerivStencil ()
 DerivStencil (const DerivStencil &a_dsin)
 ~DerivStencil ()
void clear ()
int size () const
const IntVectgetIndex (int a_ivec) const
const RealgetWeight (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< IntVectm_vectIV
Vector< Realm_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:
Generated on Thu Aug 29 11:07:40 2002 for Chombo&INS by doxygen1.2.16