goat3d
annotate libs/vmath/ray.inl @ 55:af1310ed212b
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| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 19 Jan 2014 14:56:44 +0200 |
| parents | 4deb0b12fe14 |
| children |
| rev | line source |
|---|---|
| nuclear@27 | 1 /* |
| nuclear@27 | 2 libvmath - a vector math library |
| nuclear@27 | 3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org> |
| nuclear@27 | 4 |
| nuclear@27 | 5 This program is free software: you can redistribute it and/or modify |
| nuclear@27 | 6 it under the terms of the GNU Lesser General Public License as published |
| nuclear@27 | 7 by the Free Software Foundation, either version 3 of the License, or |
| nuclear@27 | 8 (at your option) any later version. |
| nuclear@27 | 9 |
| nuclear@27 | 10 This program is distributed in the hope that it will be useful, |
| nuclear@27 | 11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| nuclear@27 | 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| nuclear@27 | 13 GNU Lesser General Public License for more details. |
| nuclear@27 | 14 |
| nuclear@27 | 15 You should have received a copy of the GNU Lesser General Public License |
| nuclear@27 | 16 along with this program. If not, see <http://www.gnu.org/licenses/>. |
| nuclear@27 | 17 */ |
| nuclear@27 | 18 |
| nuclear@27 | 19 #ifdef __cplusplus |
| nuclear@27 | 20 extern "C" { |
| nuclear@27 | 21 #endif /* __cplusplus */ |
| nuclear@27 | 22 |
| nuclear@28 | 23 static VMATH_INLINE ray_t ray_cons(vec3_t origin, vec3_t dir) |
| nuclear@27 | 24 { |
| nuclear@27 | 25 ray_t r; |
| nuclear@27 | 26 r.origin = origin; |
| nuclear@27 | 27 r.dir = dir; |
| nuclear@27 | 28 return r; |
| nuclear@27 | 29 } |
| nuclear@27 | 30 |
| nuclear@27 | 31 #ifdef __cplusplus |
| nuclear@27 | 32 } |
| nuclear@27 | 33 |
| nuclear@28 | 34 VMATH_INLINE Ray reflect_ray(const Ray &inray, const Vector3 &norm) |
| nuclear@27 | 35 { |
| nuclear@27 | 36 Ray ray = inray; |
| nuclear@27 | 37 ray.dir = ray.dir.reflection(norm); |
| nuclear@27 | 38 return ray; |
| nuclear@27 | 39 } |
| nuclear@27 | 40 |
| nuclear@28 | 41 VMATH_INLINE Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t from_ior, scalar_t to_ior) |
| nuclear@27 | 42 { |
| nuclear@27 | 43 Ray ray = inray; |
| nuclear@27 | 44 ray.dir = ray.dir.refraction(norm, from_ior, to_ior); |
| nuclear@27 | 45 |
| nuclear@27 | 46 /* check TIR */ |
| nuclear@27 | 47 if(dot_product(ray.dir, norm) > 0.0) { |
| nuclear@27 | 48 return reflect_ray(inray, norm); |
| nuclear@27 | 49 } |
| nuclear@27 | 50 return ray; |
| nuclear@27 | 51 } |
| nuclear@27 | 52 #endif /* __cplusplus */ |