goat3d
view libs/vmath/ray.inl @ 40:a5c5cec3cb88
- added mesh attribute and face append functions
- added Int4 constructor
- continued the blender exporter
- fixed a bug in clean_filename which made it produce unterminated strings
- renamed clean_filename to goat3d_clean_filename and made it extern
- added call to goat3d_clean_filename in the mesh XML export code to cleanup ctm filenames
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 13 Oct 2013 10:14:19 +0300 |
| parents | 4deb0b12fe14 |
| children |
line source
1 /*
2 libvmath - a vector math library
3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
19 #ifdef __cplusplus
20 extern "C" {
21 #endif /* __cplusplus */
23 static VMATH_INLINE ray_t ray_cons(vec3_t origin, vec3_t dir)
24 {
25 ray_t r;
26 r.origin = origin;
27 r.dir = dir;
28 return r;
29 }
31 #ifdef __cplusplus
32 }
34 VMATH_INLINE Ray reflect_ray(const Ray &inray, const Vector3 &norm)
35 {
36 Ray ray = inray;
37 ray.dir = ray.dir.reflection(norm);
38 return ray;
39 }
41 VMATH_INLINE Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t from_ior, scalar_t to_ior)
42 {
43 Ray ray = inray;
44 ray.dir = ray.dir.refraction(norm, from_ior, to_ior);
46 /* check TIR */
47 if(dot_product(ray.dir, norm) > 0.0) {
48 return reflect_ray(inray, norm);
49 }
50 return ray;
51 }
52 #endif /* __cplusplus */