1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
This file is part of LPIC++, a particle-in-cell code for
simulating the interaction of laser light with plasma.
Copyright (C) 1994-1997 Roland Lichters
LPIC++ is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef FT2_H
#define FT2_H
#include <common.h>
#include <utilities.h>
#include <math.h>
#include <fstream>
#include <iomanip>
#include <string.h>
class FFT2D {
public:
// input
int periods_input_1, periods_input_2;
int steps_pp_input_1, steps_pp_input_2;
int screen_input_1, screen_input_2;
// internal
int steps_1, steps_2, steps_half_1, steps_half_2, steps_input_1, steps_input_2;
float dt_1, dt_input_1, dt_2, dt_input_2;
float df_1, df_2;
float **local;
float *data;
float *frequency_1, *frequency_2;
float **si;
float **co;
float **power;
int *nn;
char errname[filename_size];
FFT2D ( int Q_kw, int periods_1, int steps_pp_1, int screen_1,
int periods_2, int steps_pp_2, int screen_2 );
int steps_ft ( int steps_input );
float window ( float t, int screen_input, int periods_input );
void fftn ( float* data, int *nn, int ndim, int isign );
void RealFt ( float** input );
};
#endif
|
