** Date Started: Dec 2000
**
** This is part of the CTSim program
-** Copyright (c) 1983-2001 Kevin Rosenberg
-**
-** $Id$
+** Copyright (c) 1983-2009 Kevin Rosenberg
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
}
#ifdef HAVE_FFTW
-void Fourier::shuffleNaturalToFourierOrder (fftw_complex* pVector, const int n)
+void Fourier::shuffleNaturalToFourierOrder (fftw_complex* pVector, const int n)
{
fftw_complex* pTemp = static_cast<fftw_complex*>(fftw_malloc(sizeof(fftw_complex) * n));
int i;
-
+
if (isOdd(n)) { // Odd
int iHalfN = (n - 1) / 2;
-
+
pTemp[0][0] = pVector[iHalfN][0];
pTemp[0][1] = pVector[iHalfN][1];
for (i = 0; i < iHalfN; i++) {
pTemp[i + iHalfN][1] = pVector[i][1];
}
}
-
+
for (i = 0; i < n; i++) {
pVector[i][0] = pTemp[i][0];
pVector[i][1] = pTemp[i][1];
int i;
if (isOdd(n)) { // Odd
int iHalfN = (n - 1) / 2;
-
+
pTemp[iHalfN][0] = pVector[0][0];
pTemp[iHalfN][1] = pVector[0][1];
for (i = 0; i < iHalfN; i++) {
pTemp[i + iHalfN + 1][1] = pVector[i+1][1];
}
}
-
+
for (i = 0; i < n; i++) {
pVector[i][0] = pTemp[i][0];
pVector[i][1] = pTemp[i][1];
}
-
+
fftw_free(pTemp);
}
#endif