---

ccp4_fftmap_p1.c File Reference

#include "ccp4_fftmap_p1.h"

Functions
ccp4_fftmap_p1*	ccp4_fftmap_p1_new (const int nu, const int nv, const int nw)
void	ccp4_fftmap_p1_delete (ccp4_fftmap_p1 *map)
void	ccp4_fftmap_p1_zero (ccp4_fftmap_p1 *map)
fftw_real	ccp4_fftmap_p1_get_real (const ccp4_fftmap_p1 *map, const int u, const int v, const int w)
void	ccp4_fftmap_p1_set_real (ccp4_fftmap_p1 *map, const int u, const int v, const int w, const fftw_real r)
fftw_complex	ccp4_fftmap_p1_get_reci (const ccp4_fftmap_p1 *map, const int h, const int k, const int l)
void	ccp4_fftmap_p1_set_reci (ccp4_fftmap_p1 *map, const int h, const int k, const int l, fftw_complex c)
void	ccp4_fftmap_p1_scale_reci (ccp4_fftmap_p1 *map, const double sc_re, const double sc_im)
void	ccp4_fftmap_p1_fft (ccp4_fftmap_p1 *map, const double vol)
void	ccp4_fftmap_p1_invfft (ccp4_fftmap_p1 *map, const double vol)

---

Detailed Description

(C) 2001 Kevin Cowtan, derived from code by Airlie McCoy A joint copyright is also assigned to Working Group 1 of the CCP4 project, whether they want it or not, and whether it exists or not. This code is provided as free software under the CCP4 license part (i).

---

Function Documentation

void ccp4_fftmap_p1_delete ( ccp4_fftmap_p1 * map )

destroy an fftmap_p1 and deallocate memory Parameters: map   the map to destroy

void ccp4_fftmap_p1_fft ( ccp4_fftmap_p1 * map, const double vol )

fft from reciprocal space to real space Parameters: map   The map in which to access the data vol   the volume of the unit cell

fftw_real ccp4_fftmap_p1_get_real ( const ccp4_fftmap_p1 * map, const int u, const int v, const int w )

get real data from the real space map. Map indices must be in the range (0..nu-1, 0..nv-1, 0..nw-1) Parameters: map   The map in which to access the data u   u index of data to fetch v   v index of data to fetch w   w index of data to fetch

fftw_complex ccp4_fftmap_p1_get_reci ( const ccp4_fftmap_p1 * map, const int h, const int k, const int l )

get complex data from the reciprocal space map Reflection indices must be in the range (-nu/2..nu/2-1, -nv/2..nv/2-1, -nw/2..nw/2-1) Parameters: map   The map in which to access the data h   H index of data to fetch k   K index of data to fetch l   L index of data to fetch

void ccp4_fftmap_p1_invfft ( ccp4_fftmap_p1 * map, const double vol )

fft from real space to reciprocal space Parameters: map   The map in which to access the data vol   the volume of the unit cell

ccp4_fftmap_p1* ccp4_fftmap_p1_new ( const int nu, const int nv, const int nw )

create and allocate an fftmap_p1 Parameters: nu   grid u dimension nv   grid v dimension nw   grid w dimension

void ccp4_fftmap_p1_scale_reci ( ccp4_fftmap_p1 * map, const double sc_re, const double sc_im )

scale a reciprocal space map by scaling real and reciprocal parts separately Parameters: map   The map in which to access the data sc_re   the scale factor for the real parts sc_im   the scale factor for the imaginary parts

void ccp4_fftmap_p1_set_real ( ccp4_fftmap_p1 * map, const int u, const int v, const int w, const fftw_real r )

set real data from the real space map Map indices must be in the range (0..nu-1, 0..nv-1, 0..nw-1) Parameters: map   The map in which to access the data u   u index of data to set v   v index of data to set w   w index of data to set r   the value to be set

void ccp4_fftmap_p1_set_reci ( ccp4_fftmap_p1 * map, const int h, const int k, const int l, fftw_complex c )

get complex data from the reciprocal space map Reflection indices must be in the range (-nu/2..nu/2-1, -nv/2..nv/2-1, -nw/2..nw/2-1) Parameters: map   The map in which to access the data h   H index of data to set k   K index of data to set l   L index of data to set c   the complex value to be set

void ccp4_fftmap_p1_zero ( ccp4_fftmap_p1 * map )

zero an fftmap_p1 Parameters: map   the map to zero

---