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
|
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "ray.h"
static const size_t kFramesToRender = 126;
static const size_t kWidth = 512;
static const size_t kHeight = 512;
void save_ppm(const unsigned char *src, size_t w, size_t h, const char *fmt,
...) {
const size_t kPathMax = 1024;
char path[kPathMax];
va_list ap;
size_t y, x;
FILE *f;
va_start(ap, fmt);
vsnprintf(path, kPathMax, fmt, ap);
va_end(ap);
f = fopen(path, "w");
fprintf(f, "P3\n%zu %zu\n%u\n", w, h, 255);
for (y = 0; y < h; ++y) {
for (x = 0; x < w; ++x) {
// R G B
fprintf(f, "%4u%4u%4u", src[4 * w * y + 4 * x + 0],
src[4 * w * y + 4 * x + 1], src[4 * w * y + 4 * x + 2]);
}
fprintf(f, "\n");
}
fclose(f);
}
int main() {
fprintf(stderr, "Rendering %zu frames\n", kFramesToRender);
unsigned char *buffer = calloc(4, kWidth * kHeight);
for (size_t i = 0; i < kFramesToRender; ++i) {
trace_scene(i * 0.1f, kWidth, kHeight, buffer, 1);
save_ppm(buffer, kWidth, kHeight, "out_%06u.ppm", i);
fprintf(stderr, " %zu\n", i);
}
return EXIT_SUCCESS;
}
|
