diff options
| -rw-r--r-- | ray.c | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -47,11 +47,13 @@ static Light lights[] = { }; static void -trace(float s[3], const float d[3], float pixel[3], int n) { +trace(const float s[3], const float d[3], float pixel[3], int n, unsigned int mask) { int i, j, k, m; float l[3], r[3], t, y[3]; for(j = 0; j < LENGTH(objects); ++j) { + if ((1 << j) & mask) continue; + t = sphere_intersect(y, r, s, d, objects[j].position, objects[j].radius); if(t > 0) { @@ -66,7 +68,7 @@ trace(float s[3], const float d[3], float pixel[3], int n) { pixel[k] += lights[m].diffuse[k] * objects[j].diffuse[k] * scale; } - trace(y, r, pixel, n + 1); + trace(y, r, pixel, n + 1, (1 << j)); } } } @@ -79,7 +81,7 @@ trace_line(int l, unsigned char *buf) { for(int i = 0; i < WIDTH; ++i, buf += 4) { float pixel[3] = { 0, 0, 0 }; - trace(s, trace_vectors[l][i], pixel, 1); + trace(s, trace_vectors[l][i], pixel, 1, 0); buf[0] = MIN(pixel[0], 1.0f) * 255; buf[1] = MIN(pixel[1], 1.0f) * 255; |