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Munching squares: Difference between revisions
→{{header|C}}: better colors
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(→{{header|C}}: better colors) |
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Line 6:
<lang c>#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
void hue_to_rgb(double hue, double sat, unsigned char *p)
{
double x;
int c = 255 * sat;
hue /= 60;
x = (1 - fabs(fmod(hue, 2) - 1)) * 255;
switch((int)hue) {
case 0: p[0] = c; p[1] = x; p[2] = 0; return;
case 1: p[0] = x; p[1] = c; p[2] = 0; return;
case 2: p[0] = 0; p[1] = c; p[2] = x; return;
case 3: p[0] = 0; p[1] = x; p[2] = c; return;
case 4: p[0] = x; p[1] = 0; p[2] = c; return;
case 5: p[0] = c; p[1] = 0; p[2] = x; return;
▲ }
}
int main(void)
{
int i, j;
unsigned char *pix = malloc(size * size * 3), *p;
FILE *fp;
for (i = 0; i < color_table_size; ++i) {▼
FILE *fp = fopen("xor_pattern.ppm", "wb");▼
(void) fprintf(fp, "P6\n%d %d\n255\n", width, height);▼
for (y = 0; y < height; ++y) {▼
(void) fclose(fp);▼
}</lang>▼
hue_to_rgb(i * 240. / size, i * 1. / size, colors + 3 * i);
for (i = 0, p = pix; i < size; i++)
memcpy(p, colors + (i ^ j) * 3, 3);
fwrite(pix, size * size * 3, 1, fp);
return 0;
▲}</lang>
[[Image:Xor_pattern_c.png|C output|200px]]
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