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
|
void *malloc();
void *SDL_CreateWindow();
void *SDL_CreateRenderer();
int SDL_SetRenderDrawColor();
int SDL_RenderDrawPoint();
int SDL_RenderClear();
int SDL_RenderPresent();
int SDL_PollEvent();
int SDL_DestroyRenderer();
int SDL_DestroyWindow();
int SDL_Quit();
int SDL_Init();
void *win;
void *rnd;
int W;
int H;
int *col;
plot(int x, int y)
{
int n;
int fx;
int fy;
int zx;
int zy;
int nx;
int ny;
fx = (x - W/2)*4000 / W;
fy = (y - H/2)*4000 / H;
zx = fx;
zy = fy;
for (n=0; n<200; n++) {
if (zx*zx + zy*zy > 4000000)
break;
nx = (zx*zx)/1000 - (zy*zy)/1000 + fx;
ny = zx*zy/500 + fy;
zx = nx;
zy = ny;
}
n = col[n];
SDL_SetRenderDrawColor(rnd, 100, n, n, 255);
SDL_RenderDrawPoint(rnd, x, y);
return 0;
}
main() {
int c;
int n;
int x;
int y;
void *e;
int *ie;
W = 800;
H = 800;
SDL_Init(32);
win = SDL_CreateWindow("Mandelbrot MiniC", 0, 0, W, H, 0);
rnd = SDL_CreateRenderer(win, -1, 0);
e = malloc(56);
ie = e;
col = malloc(201 * sizeof (int));
c = 20;
for (n=0; n<200; n++) {
col[n] = c;
c = c + (255-c)/8;
}
col[n] = 30;
SDL_RenderClear(rnd);
for (x=0; x<W; x++)
for (y=0; y<H; y++)
plot(x, y);
SDL_RenderPresent(rnd);
for (;;) {
if (SDL_PollEvent(e)) {
if (ie[0] == 769)
break;
}
}
SDL_DestroyRenderer(rnd);
SDL_DestroyWindow(win);
SDL_Quit();
}
|
