fieldslice.cpp
2.24 KB
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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
#include "fieldslice.h"
#include "dataTypes.h"
#include "cufft.h"
#include <iostream>
#include <stdlib.h>
using namespace std;
fieldslice::fieldslice(unsigned int x_size, unsigned int y_size)
{
//save the slice resolution
R[0] = x_size;
R[1] = x_size;
scalarField = true;
//init_gpu();
}
void fieldslice::toAngularSpectrum()
{
cufftHandle plan;
cufftResult result;
//create a CUFFT plan handle
#ifdef PRECISION_SINGLE
result = cufftPlan2d(&plan, R[0], R[1], CUFFT_C2C);
#elif defined PRECISION_DOUBLE
result = cufftPlan2d(&plan, R[0], R[1], CUFFT_Z2Z);
#endif
if(result != CUFFT_SUCCESS)
{
cout<<"Error creating CUFFT plan for computing the angular spectrum."<<endl;
exit(1);
}
#ifdef PRECISION_SINGLE
result = cufftExecC2C(plan, (cufftComplex*)x_hat, (cufftComplex*)x_hat, CUFFT_FORWARD);
#elif defined PRECISION_DOUBLE
result = cufftExecZ2Z(plan, (cufftDoubleComplex*)x_hat, (cufftDoubleComplex*)x_hat, CUFFT_FORWARD);
#endif
if(result != CUFFT_SUCCESS)
{
cout<<"Error executing the CUFFT forward FFT to compute the angular spectrum."<<endl;
exit(1);
}
cufftDestroy(plan);
}
void fieldslice::fromAngularSpectrum()
{
cufftHandle plan;
cufftResult result;
//create a CUFFT plan handle
#ifdef PRECISION_SINGLE
result = cufftPlan2d(&plan, R[0], R[1], CUFFT_C2C);
#elif defined PRECISION_DOUBLE
result = cufftPlan2d(&plan, R[0], R[1], CUFFT_Z2Z);
#endif
if(result != CUFFT_SUCCESS)
{
cout<<"Error creating CUFFT plan for computing the angular spectrum."<<endl;
exit(1);
}
#ifdef PRECISION_SINGLE
result = cufftExecC2C(plan, (cufftComplex*)x_hat, (cufftComplex*)x_hat, CUFFT_INVERSE);
#elif defined PRECISION_DOUBLE
result = cufftExecZ2Z(plan, (cufftDoubleComplex*)x_hat, (cufftDoubleComplex*)x_hat, CUFFT_INVERSE);
#endif
if(result != CUFFT_SUCCESS)
{
cout<<"Error executing the CUFFT forward FFT to compute the angular spectrum."<<endl;
exit(1);
}
//divide the field by the number of values in the field
ScaleField( 1.0 / (R[0] * R[1]));
cufftDestroy(plan);
}
fieldslice::fieldslice()
{
R[0] = R[1] = 0;
x_hat = y_hat = z_hat = NULL;
}
fieldslice::~fieldslice()
{
//kill_gpu();
}