istereo
annotate libs/vmath/ray_c.c @ 28:c0ae8e668447
added vmath library
| author | John Tsiombikas <nuclear@mutantstargoat.com> |
|---|---|
| date | Thu, 08 Sep 2011 08:30:42 +0300 |
| parents | |
| children | ff055bff6a15 |
| rev | line source |
|---|---|
| nuclear@28 | 1 #include "ray.h" |
| nuclear@28 | 2 #include "vector.h" |
| nuclear@28 | 3 |
| nuclear@28 | 4 ray_t ray_transform(ray_t r, mat4_t xform) |
| nuclear@28 | 5 { |
| nuclear@28 | 6 mat4_t upper; |
| nuclear@28 | 7 vec3_t dir; |
| nuclear@28 | 8 |
| nuclear@28 | 9 m4_copy(upper, xform); |
| nuclear@28 | 10 upper[0][3] = upper[1][3] = upper[2][3] = upper[3][0] = upper[3][1] = upper[3][2] = 0.0; |
| nuclear@28 | 11 upper[3][3] = 1.0; |
| nuclear@28 | 12 |
| nuclear@28 | 13 dir = v3_sub(r.dir, r.origin); |
| nuclear@28 | 14 dir = v3_transform(dir, upper); |
| nuclear@28 | 15 r.origin = v3_transform(r.origin, xform); |
| nuclear@28 | 16 r.dir = v3_add(dir, r.origin); |
| nuclear@28 | 17 return r; |
| nuclear@28 | 18 } |