FASMultiGrid< T > Class Template Reference

#include <FASMultiGrid.H>

Inheritance diagram for FASMultiGrid< T >:

[legend]

List of all members.

template<class T>
class FASMultiGrid< T >

Public Member Functions
	FASMultiGrid ()
virtual	~FASMultiGrid ()
virtual void	define (MGLevelOpFactory< T > &a_factory, LinearSolver< T > *a_bottomSolver, const ProblemDomain &a_domain, int a_maxDepth=-1, MGLevelOp< T > *a_finestLevelOp=NULL)
	Function to define a FASMultiGrid object.
virtual void	solve (T &a_phi, const T &a_rhs, Real a_tolerance, int a_maxIterations, int verbosity=0)
virtual void	oneCycle (T &a_e, const T &a_res)
	Execute ONE v-cycle of multigrid.
void	oneCycle (T &a_e, const T &a_res, T *a_phiCoarse)
virtual void	cycle (int a_depth, T &a_correction, const T &a_residual)
Public Attributes
int	m_bottomSolve_iter
Protected Attributes
Vector< T * >	m_phiCoarse

---

Constructor & Destructor Documentation

template<class T>

FASMultiGrid< T >::FASMultiGrid

(

)

[inline]

template<class T>

FASMultiGrid< T >::~FASMultiGrid

(

)

[inline, virtual]

References CH_TIME.

---

Member Function Documentation

template<class T>

void FASMultiGrid< T >::define	(	MGLevelOpFactory< T > &	a_factory,
		LinearSolver< T > *	a_bottomSolver,
		const ProblemDomain &	a_domain,
		int	a_maxDepth = -1,
		MGLevelOp< T > *	a_finestLevelOp = NULL
	)			[inline, virtual]

Function to define a FASMultiGrid object.

a_factory is the factory for generating operators. a_bottomSolver is called at the bottom of v-cycle. a_domain is the problem domain at the top of the vcycle. maxDepth defines the location of the bottom of the v-cycle. The vycle will terminate (hit bottom) when the factory returns NULL for a paticular depth if maxdepth = -1. Otherwise the vycle terminates at maxdepth.

Reimplemented from MultiGrid< T >.

References MultiGrid< T >::define(), FASMultiGrid< T >::m_bottomSolve_iter, and MultiGrid< T >::m_homogeneous.

template<class T>

void FASMultiGrid< T >::solve	(	T &	a_phi,
		const T &	a_rhs,
		Real	a_tolerance,
		int	a_maxIterations,
		int	verbosity = 0
	)			[inline, virtual]

solve L(a_phi) = a_rhs. Tolerance is how much you want the norm of the error reduced. verbosity is how chatty you want the function to be. maxIterations is the maximum number of v-cycles. This does the whole residual correction switcharoo and calls oneCycle up to maxIterations times, evaluating the residual as it goes.

Reimplemented from MultiGrid< T >.

References CH_TIME, Vector< T >::clear(), FASMultiGrid< T >::cycle(), MultiGrid< T >::init(), MultiGrid< T >::m_op, Max(), and pout().

template<class T>

void FASMultiGrid< T >::oneCycle	(	T &	a_e,
		const T &	a_res
	)			[inline, virtual]

Execute ONE v-cycle of multigrid.

If you want the solution to converge, you need to iterate this. See solve() or AMRFASMultiGrid::solve for a more automatic solve() function.

Reimplemented from MultiGrid< T >.

References CH_assert.

Referenced by AMRFASMultiGrid< T >::VCycle().

template<class T>

void FASMultiGrid< T >::oneCycle	(	T &	a_e,
		const T &	a_res,
		T *	a_phiCoarse
	)			[inline]

References Box::bigEnd(), CH_TIME, FASMultiGrid< T >::cycle(), ProblemDomain::domainBox(), MultiGrid< T >::m_depth, MultiGrid< T >::m_op, FASMultiGrid< T >::m_phiCoarse, DisjointBoxLayout::physDomain(), Vector< T >::resize(), Vector< T >::size(), and Box::smallEnd().

template<class T>

void FASMultiGrid< T >::cycle	(	int	a_depth,
		T &	a_correction,
		const T &	a_residual
	)			[inline, virtual]

Reimplemented from MultiGrid< T >.

References CH_TIME, Vector< T >::clear(), MayDay::Error(), FASMultiGrid< T >::m_bottomSolve_iter, MultiGrid< T >::m_correction, MultiGrid< T >::m_cycle, MultiGrid< T >::m_depth, MultiGrid< T >::m_op, FASMultiGrid< T >::m_phiCoarse, MultiGrid< T >::m_post, MultiGrid< T >::m_pre, and MultiGrid< T >::m_residual.

Referenced by FASMultiGrid< T >::oneCycle(), and FASMultiGrid< T >::solve().

---

Member Data Documentation

template<class T>

int FASMultiGrid< T >::m_bottomSolve_iter

Referenced by FASMultiGrid< T >::cycle(), and FASMultiGrid< T >::define().

template<class T>

Vector< T* > FASMultiGrid< T >::m_phiCoarse [protected]

Referenced by FASMultiGrid< T >::cycle(), and FASMultiGrid< T >::oneCycle().

---

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

• FASMultiGrid.H