FFT< SineTransform, Dim, T > Class Template Reference

#include <FFT.h>

Inheritance diagram for FFT< SineTransform, Dim, T >:

Collaboration diagram for FFT< SineTransform, Dim, T >:

Public Types
typedef FieldLayout< Dim >	Layout_t
typedef BareField< T, Dim >	RealField_t
typedef LField< T, Dim >	RealLField_t
typedef std::complex< T >	Complex_t
typedef BareField< Complex_t, Dim >	ComplexField_t
typedef LField< Complex_t, Dim >	ComplexLField_t
typedef FFTBase< Dim, T >::Domain_t	Domain_t
Public Types inherited from FFTBase< Dim, T >
enum	{ dimensions = Dim }
enum	FFT_e { ccFFT, rcFFT, sineFFT, cosineFFT }
typedef T	Precision_t
typedef NDIndex< Dim >	Domain_t
typedef FFTPACK< T >	InternalFFT_t

Public Member Functions
	FFT (const Domain_t &rdomain, const Domain_t &cdomain, const bool transformTheseDims[Dim], const bool sineTransformDims[Dim], const bool &compressTemps=false)
	FFT (const Domain_t &rdomain, const Domain_t &cdomain, const bool sineTransformDims[Dim], const bool &compressTemps=false)
	FFT (const Domain_t &rdomain, const bool sineTransformDims[Dim], const bool &compressTemps=false)
	FFT (const Domain_t &rdomain, const bool &compressTemps=false)
	~FFT (void)
void	transform (int direction, RealField_t &f, ComplexField_t &g, const bool &constInput=false)
void	transform (const char *directionName, RealField_t &f, ComplexField_t &g, const bool &constInput=false)
void	transform (int direction, ComplexField_t &f, RealField_t &g, const bool &constInput=false)
void	transform (const char *directionName, ComplexField_t &f, RealField_t &g, const bool &constInput=false)
void	transform (int direction, RealField_t &f, RealField_t &g, const bool &constInput=false)
void	transform (const char *directionName, RealField_t &f, RealField_t &g, const bool &constInput=false)
void	transform (int direction, RealField_t &f)
void	transform (const char *directionName, RealField_t &f)
Public Member Functions inherited from FFTBase< Dim, T >
	FFTBase ()
	FFTBase (FFT_e transform, const Domain_t &domain, const bool transformTheseDims[Dim], bool compressTemps)
	FFTBase (FFT_e transform, const Domain_t &domain, bool compressTemps)
virtual	~FFTBase (void)
void	write (std::ostream &out) const
void	setDirectionName (int direction, const char *directionName)
void	setNormFact (Precision_t nf)
int	transVnodes () const

Private Member Functions
void	setup (void)

Private Attributes
bool	sineTransformDims_m [Dim]
size_t	numSineTransforms_m
Layout_t **	tempLayouts_m
Layout_t **	tempRLayouts_m
ComplexField_t **	tempFields_m
RealField_t **	tempRFields_m
const Domain_t *	complexDomain_m

Additional Inherited Members
Protected Member Functions inherited from FFTBase< Dim, T >
int	getDirection (const char *directionName) const
	translate direction name string into dimension number More...
bool	transformDim (unsigned d) const
	query whether this dimension is to be transformed More...
unsigned	numTransformDims (void) const
	query number of transform dimensions More...
unsigned	activeDimension (unsigned d) const
	get dimension number from list of transformed dimensions More...
InternalFFT_t &	getEngine (void)
	access the internal FFT Engine More...
Precision_t &	getNormFact (void)
	get the FFT normalization factor More...
const Domain_t &	getDomain (void) const
	get our domain More...
bool	checkDomain (const Domain_t &dom1, const Domain_t &dom2) const
	compare indexes of two domains More...
bool	compressTemps (void) const
	do we compress temps? More...
Static Protected Attributes inherited from FFTBase< Dim, T >
static GuardCellSizes< Dim >	nullGC = GuardCellSizes<Dim>()
	null GuardCellSizes object for checking BareField arguments to transform More...

Detailed Description

template<size_t Dim, class T>
class FFT< SineTransform, Dim, T >

sine transform class

Definition at line 660 of file FFT.h.

Member Typedef Documentation

template<size_t Dim, class T >

typedef std::complex<T> FFT< SineTransform, Dim, T >::Complex_t

Definition at line 668 of file FFT.h.

template<size_t Dim, class T >

typedef BareField<Complex_t,Dim> FFT< SineTransform, Dim, T >::ComplexField_t

Definition at line 669 of file FFT.h.

template<size_t Dim, class T >

typedef LField<Complex_t,Dim> FFT< SineTransform, Dim, T >::ComplexLField_t

Definition at line 670 of file FFT.h.

template<size_t Dim, class T >

typedef FFTBase<Dim,T>::Domain_t FFT< SineTransform, Dim, T >::Domain_t

Definition at line 671 of file FFT.h.

template<size_t Dim, class T >

typedef FieldLayout<Dim> FFT< SineTransform, Dim, T >::Layout_t

Definition at line 665 of file FFT.h.

template<size_t Dim, class T >

typedef BareField<T,Dim> FFT< SineTransform, Dim, T >::RealField_t

Definition at line 666 of file FFT.h.

template<size_t Dim, class T >

typedef LField<T,Dim> FFT< SineTransform, Dim, T >::RealLField_t

Definition at line 667 of file FFT.h.

Constructor & Destructor Documentation

template<size_t Dim, class T >

FFT< SineTransform, Dim, T >::FFT	(	const Domain_t &	rdomain,
		const Domain_t &	cdomain,
		const bool	transformTheseDims[Dim],
		const bool	sineTransformDims[Dim],
		const bool &	compressTemps = false
	)

Constructor for doing sine transform(s) followed by RC FFT Create a new FFT object with the given domains for input/output Fields Specify which dimensions to transform along. Also specify which of these are sine transforms Optional argument compress indicates whether or not to compress temporary Fields in between uses.

template<size_t Dim, class T >

FFT< SineTransform, Dim, T >::FFT	(	const Domain_t &	rdomain,
		const Domain_t &	cdomain,
		const bool	sineTransformDims[Dim],
		const bool &	compressTemps = false
	)

Same as above, but transform all dims:

template<size_t Dim, class T >

FFT< SineTransform, Dim, T >::FFT	(	const Domain_t &	rdomain,
		const bool	sineTransformDims[Dim],
		const bool &	compressTemps = false
	)

Separate constructors for doing only sine transforms Create a new FFT object with the given domain for input/output Field Specify which dimensions to transform along. Optional argument compress indicates whether or not to compress temporary Fields in between uses.

template<size_t Dim, class T >

FFT< SineTransform, Dim, T >::FFT	(	const Domain_t &	rdomain,
		const bool &	compressTemps = false
	)

Same as above, but transform all dims:

template<size_t Dim, class T >

FFT< SineTransform, Dim, T >::~FFT

(

void

)

Definition at line 2127 of file FFT.hpp.

References FFTBase< Dim, T >::numTransformDims().

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Member Function Documentation

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::setup ( void  )

private

setup performs all the initializations necessary after the transform directions have been specified.

Definition at line 1973 of file FFT.hpp.

References FFTBase< Dim, T >::activeDimension(), FFTBase< Dim, T >::compressTemps(), Dim, FFTBase< Dim, T >::getDomain(), FFTBase< Dim, T >::numTransformDims(), PARALLEL, PAssert, PAssert_EQ, PAssert_LT, PInsist, SERIAL, FFTBase< Dim, T >::transformDim(), and FFTBase< Dim, T >::transVnodes().

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template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	int	direction,
		RealField_t &	f,
		ComplexField_t &	g,
		const bool &	constInput = false
	)

These transforms are for combinations of sine transforms and RC FFTs

Do the FFT: specify +1 or -1 to indicate forward or inverse transform, or specify the user-defined name string for the direction. Supply a second BareField to store the output. optional argument constInput indicates whether or not to treat the input Field argument f as const. If not, we can use it as a temporary in order to avoid an additional data transpose.

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	const char *	directionName,
		RealField_t &	f,
		ComplexField_t &	g,
		const bool &	constInput = false
	)

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	int	direction,
		ComplexField_t &	f,
		RealField_t &	g,
		const bool &	constInput = false
	)

complex-to-real FFT, followed by sine transform(s) Same as above, but with input and output field types reversed.

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	const char *	directionName,
		ComplexField_t &	f,
		RealField_t &	g,
		const bool &	constInput = false
	)

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	int	direction,
		RealField_t &	f,
		RealField_t &	g,
		const bool &	constInput = false
	)

These transforms are for doing sine transforms only sine transform: specify +1 or -1 to indicate forward or inverse transform, or specify the user-defined name string for the direction. Supply a second BareField to store the output. optional argument constInput indicates whether or not to treat the input Field argument f as const. If not, we can use it as a temporary in order to avoid an additional data transpose.

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	const char *	directionName,
		RealField_t &	f,
		RealField_t &	g,
		const bool &	constInput = false
	)

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	int	direction,
		RealField_t &	f
	)

In-place version of real-to-real transform

template<size_t Dim, class T >

void FFT< SineTransform, Dim, T >::transform	(	const char *	directionName,
		RealField_t &	f
	)

Member Data Documentation

template<size_t Dim, class T >

const Domain_t* FFT< SineTransform, Dim, T >::complexDomain_m

private

domain of the resulting complex Field for real-to-complex transform

Definition at line 795 of file FFT.h.

template<size_t Dim, class T >

size_t FFT< SineTransform, Dim, T >::numSineTransforms_m

private

number of sine transforms to perform

Definition at line 766 of file FFT.h.

template<size_t Dim, class T >

bool FFT< SineTransform, Dim, T >::sineTransformDims_m[Dim]

private

which dimensions are sine transformed

Definition at line 761 of file FFT.h.

template<size_t Dim, class T >

ComplexField_t** FFT< SineTransform, Dim, T >::tempFields_m

private

The array of temporary complex Fields These use the corresponding tempLayouts.

Definition at line 785 of file FFT.h.

template<size_t Dim, class T >

Layout_t** FFT< SineTransform, Dim, T >::tempLayouts_m

private

layouts for temporary Fields: SERIAL along the zeroth dimension, with the axes are permuted so that the transform direction is first

layouts for the temporary complex Fields

Definition at line 775 of file FFT.h.

template<size_t Dim, class T >

RealField_t** FFT< SineTransform, Dim, T >::tempRFields_m

private

The array of temporary real Fields These use the corresponding tempRLayouts.

Definition at line 790 of file FFT.h.

template<size_t Dim, class T >

Layout_t** FFT< SineTransform, Dim, T >::tempRLayouts_m

private

layouts for the temporary real Fields

Definition at line 780 of file FFT.h.

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

• ippl/src/FFT/FFT.h
• ippl/src/FFT/FFT.hpp