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
|
#include "fractals.h"
#include <omp.h>
#include "fractals.h"
/*
* Computes the number of iterations it takes for a point z0 to diverge
* if the return value is equal to max_iterations, the point lies within the mandelbrot set
* This should be identical to the version found in serial-fractals.c
*/
size_t mandelbrot(const long double complex z0, const size_t max_iterations){
long double complex z = z0;
size_t iteration = 0;
while(cabsl(z) <= 2 && iteration < max_iterations){
z = z*z + z0;
iteration++;
}
return iteration;
}
/*
* Fills a grid with mandelbrot values
*/
void mandelbrot_grid(grid_t* grid, const size_t max_iterations){
const size_t size = grid->size;
size_t* data = grid->data;
#pragma omp parallel for default(none) shared(data, size, grid, max_iterations) schedule(dynamic)
for(size_t i = 0; i < size; i++){
data[i] = mandelbrot(grid_to_complex(grid, i), max_iterations);
}
}
/*
* Computes the number of iterations it takes for a point z0 to diverge
* if the return value is equal to max_iterations, the point lies within the multibrot set
* This should be identical to the version found in serial-fractals.c
*/
size_t multibrot(const long double complex z0, const size_t max_iterations, const double d){
long double complex z = z0;
size_t iteration = 0;
while(cabsl(z) <= 2 && iteration < max_iterations){
z = cpowl(z, d) + z0;
iteration++;
}
return iteration;
}
/*
* Fills a grid with multibrot values
*/
void multibrot_grid(grid_t* grid, const size_t max_iterations, const double d){
const size_t size = grid->size;
size_t* data = grid->data;
#pragma omp parallel for default(none) shared(data, size, grid, max_iterations, d) schedule(dynamic)
for(size_t i = 0; i < size; i ++){
data[i] = multibrot(grid_to_complex(grid, i), max_iterations, d);
}
}
|
