istereo
annotate libs/vmath/ray.inl @ 29:fb4c9641059f
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| author | John Tsiombikas <nuclear@mutantstargoat.com> |
|---|---|
| date | Thu, 08 Sep 2011 08:31:15 +0300 |
| parents | |
| children | ff055bff6a15 |
| rev | line source |
|---|---|
| nuclear@29 | 1 #ifdef __cplusplus |
| nuclear@29 | 2 extern "C" { |
| nuclear@29 | 3 #endif /* __cplusplus */ |
| nuclear@29 | 4 |
| nuclear@29 | 5 static inline ray_t ray_cons(vec3_t origin, vec3_t dir) |
| nuclear@29 | 6 { |
| nuclear@29 | 7 ray_t r; |
| nuclear@29 | 8 r.origin = origin; |
| nuclear@29 | 9 r.dir = dir; |
| nuclear@29 | 10 return r; |
| nuclear@29 | 11 } |
| nuclear@29 | 12 |
| nuclear@29 | 13 #ifdef __cplusplus |
| nuclear@29 | 14 } |
| nuclear@29 | 15 |
| nuclear@29 | 16 inline Ray reflect_ray(const Ray &inray, const Vector3 &norm) |
| nuclear@29 | 17 { |
| nuclear@29 | 18 Ray ray = inray; |
| nuclear@29 | 19 ray.iter--; |
| nuclear@29 | 20 ray.dir = ray.dir.reflection(norm); |
| nuclear@29 | 21 return ray; |
| nuclear@29 | 22 } |
| nuclear@29 | 23 |
| nuclear@29 | 24 inline Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t mat_ior, bool entering, scalar_t ray_mag) |
| nuclear@29 | 25 { |
| nuclear@29 | 26 Ray ray = inray; |
| nuclear@29 | 27 ray.iter--; |
| nuclear@29 | 28 |
| nuclear@29 | 29 scalar_t ior = ray.calc_ior(entering, mat_ior); |
| nuclear@29 | 30 |
| nuclear@29 | 31 if(entering) { |
| nuclear@29 | 32 ray.enter(mat_ior); |
| nuclear@29 | 33 } else { |
| nuclear@29 | 34 ray.leave(); |
| nuclear@29 | 35 } |
| nuclear@29 | 36 |
| nuclear@29 | 37 if(ray_mag < 0.0) { |
| nuclear@29 | 38 ray_mag = ray.dir.length(); |
| nuclear@29 | 39 } |
| nuclear@29 | 40 ray.dir = (ray.dir / ray_mag).refraction(norm, ior) * ray_mag; |
| nuclear@29 | 41 |
| nuclear@29 | 42 /* check TIR */ |
| nuclear@29 | 43 if(dot_product(ray.dir, norm) > 0.0) { |
| nuclear@29 | 44 if(entering) { |
| nuclear@29 | 45 ray.leave(); |
| nuclear@29 | 46 } else { |
| nuclear@29 | 47 ray.enter(mat_ior); |
| nuclear@29 | 48 } |
| nuclear@29 | 49 } |
| nuclear@29 | 50 return ray; |
| nuclear@29 | 51 } |
| nuclear@29 | 52 #endif /* __cplusplus */ |