Package ffx.numerics.fft

Class Real3D

java.lang.Object
ffx.numerics.fft.Real3D
public class Real3D extends Object
Compute the 3D FFT of real, double precision input of arbitrary dimensions.

Since:
1.0
Author:
Michal J. Schnieders
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    Real3D(int nX, int nY, int nZ)
    Initialize the 3D FFT for complex 3D matrix.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    convolution(double[] input)
    convolution
    void
    fft(double[] input)
    Compute the 3D FFT.
    void
    ifft(double[] input)
    Compute the inverse 3D FFT.
    static int
    iReal3D(int i, int j, int k, int nX, int nY)
    Determine the index of the real number in the 1D array from the X, Y and Z indices.
    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

    • Real3D

      public Real3D(int nX, int nY, int nZ)
      Initialize the 3D FFT for complex 3D matrix.
      Parameters:
      nX - X-dimension.
      nY - Y-dimension.
      nZ - Z-dimension.

  • Method Details

    • iReal3D

      public static int iReal3D(int i, int j, int k, int nX, int nY)
      Determine the index of the real number in the 1D array from the X, Y and Z indices.
      Parameters:
      i - the index along the X-axis.
      j - the index along the Y-axis.
      k - the index along the Z-axis.
      nX - the number of points along the X-axis.
      nY - the number of points along the Y-axis.
      Returns:
      the index of the real number in the 1D array.

    • convolution

      public void convolution(double[] input)
      convolution
      Parameters:
      input - an array of double.

    • fft

      public void fft(double[] input)
      Compute the 3D FFT.
      Parameters:
      input - The input array must be of size (nX + 2) * nY * nZ.

    • ifft

      public void ifft(double[] input)
      Compute the inverse 3D FFT.
      Parameters:
      input - The input array must be of size (nX + 2) * nY * nZ.

    • setRecip

      public void setRecip(double[] recip)
      Setter for the field recip.
      Parameters:
      recip - an array of double.