Package ffx.numerics.fft

Class Real3DParallel

java.lang.Object

ffx.numerics.fft.Real3DParallel

public class Real3DParallel
extends Object

Compute the 3D FFT of real, double precision input of arbitrary dimensions in parallel.

Since:

1.0

Author:

Michal J. Schnieders

See Also:

• Real

Constructor Summary

Constructors

Constructor	Description
Real3DParallel(int nX, int nY, int nZ, ParallelTeam parallelTeam)	Initialize the FFT for real input.
Real3DParallel(int nX, int nY, int nZ, ParallelTeam parallelTeam, IntegerSchedule integerSchedule)	Initialize the FFT for real input.

Method Summary

Modifier and Type	Method	Description
void	convolution(double[] input)	Compute a convolution in parallel.
void	fft(double[] input)	Compute the 3D FFT.
void	ifft(double[] input)	Compute the inverse 3D FFT.
static void	main(String[] args)	Test the real 3D FFT.
void	setRecip(double[] recip)	Setter for the field recip.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Real3DParallel

public Real3DParallel(int nX,
 int nY,
 int nZ,
 ParallelTeam parallelTeam)

Initialize the FFT for real input.

Parameters:

nX - X-dimension.

nY - Y-dimension.

nZ - Z-dimension.

parallelTeam - a ParallelTeam object.

Since:

1.0

Real3DParallel

public Real3DParallel(int nX,
 int nY,
 int nZ,
 ParallelTeam parallelTeam,
 @Nullable
 IntegerSchedule integerSchedule)

Initialize the FFT for real input.

Parameters:

nX - X-dimension.

nY - Y-dimension.

nZ - Z-dimension.

parallelTeam - The ParallelTeam that will execute the transforms.

integerSchedule - The IntegerSchedule to use.

Since:

1.0

Method Details

main

public static void main(String[] args)

Test the real 3D FFT.

Parameters:

args - an array of String objects.

Since:

1.0

convolution

public void convolution(double[] input)

Compute a convolution in parallel.

Parameters:

input - The input array must be of size (nX + 2) * nY * nZ.

Since:

1.0

fft

public void fft(double[] input)

Compute the 3D FFT.

Parameters:

input - The input array must be of size (nX + 2) * nY * nZ.

Since:

1.0

ifft

public void ifft(double[] input)

Compute the inverse 3D FFT.

Parameters:

input - The input array must be of size (nX + 2) * nY * nZ.

Since:

1.0

setRecip

public void setRecip(double[] recip)

Setter for the field recip.

Parameters:

recip - The recip array must be of size [(nX/2 + 1) * nY * nZ].