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author | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-11-16 22:49:46 -0500 |
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committer | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-11-16 22:49:46 -0500 |
commit | 41ba9c89b071fbc9097daaa6810a6abe2ba5085b (patch) | |
tree | bb6f8edf94e2bc0e494ab0fcbbb8ce4a92a8df24 | |
parent | c744281317a0c7c011fc3c88a2336cdff6382935 (diff) | |
download | roux-41ba9c89b071fbc9097daaa6810a6abe2ba5085b.tar.gz |
start new example for minic (mandelbrot)
-rw-r--r-- | minic/test/mandel.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/minic/test/mandel.c b/minic/test/mandel.c new file mode 100644 index 0000000..a310cf8 --- /dev/null +++ b/minic/test/mandel.c @@ -0,0 +1,82 @@ +#include <stdlib.h> +#include <stdio.h> +#include <SDL2/SDL.h> + +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 = 255 - col[n]; + SDL_SetRenderDrawColor(rnd, n, 130, n, 255); + SDL_RenderDrawPoint(rnd, x, y); + return 0; +} + +main() { + int c; + int n; + int x; + int y; + void *e; + int *ie; + + W = 400; + H = 400; + 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; + if (c > 255) + printf("%d\n", c); + c += (255-c)/8; + } + col[n] = 0; + + 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(); + return 0; +} |