goat3d

annotate libs/vmath/ray.inl @ 28:9ba3e2fb8a33

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modified vmath to work with vs2012, still memory corruptions in 3dsmax...
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 29 Sep 2013 08:46:19 +0300
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 */