istereo2

annotate libs/vmath/ray.inl @ 25:a9f2d30f7e8e

First hack at implementing banners on android. JNI interface to hide/show ads with the menu remains to be done.
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 05 Oct 2015 06:00:16 +0300
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nuclear@2 1 /*
nuclear@2 2 libvmath - a vector math library
nuclear@2 3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
nuclear@2 4
nuclear@2 5 This program is free software: you can redistribute it and/or modify
nuclear@2 6 it under the terms of the GNU Lesser General Public License as published
nuclear@2 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@2 8 (at your option) any later version.
nuclear@2 9
nuclear@2 10 This program is distributed in the hope that it will be useful,
nuclear@2 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@2 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@2 13 GNU Lesser General Public License for more details.
nuclear@2 14
nuclear@2 15 You should have received a copy of the GNU Lesser General Public License
nuclear@2 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@2 17 */
nuclear@2 18
nuclear@2 19 #ifdef __cplusplus
nuclear@2 20 extern "C" {
nuclear@2 21 #endif /* __cplusplus */
nuclear@2 22
nuclear@2 23 static inline ray_t ray_cons(vec3_t origin, vec3_t dir)
nuclear@2 24 {
nuclear@2 25 ray_t r;
nuclear@2 26 r.origin = origin;
nuclear@2 27 r.dir = dir;
nuclear@2 28 return r;
nuclear@2 29 }
nuclear@2 30
nuclear@2 31 #ifdef __cplusplus
nuclear@2 32 }
nuclear@2 33
nuclear@2 34 inline Ray reflect_ray(const Ray &inray, const Vector3 &norm)
nuclear@2 35 {
nuclear@2 36 Ray ray = inray;
nuclear@2 37 ray.iter--;
nuclear@2 38 ray.dir = ray.dir.reflection(norm);
nuclear@2 39 return ray;
nuclear@2 40 }
nuclear@2 41
nuclear@2 42 inline Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t mat_ior, bool entering, scalar_t ray_mag)
nuclear@2 43 {
nuclear@2 44 Ray ray = inray;
nuclear@2 45 ray.iter--;
nuclear@2 46
nuclear@2 47 scalar_t ior = ray.calc_ior(entering, mat_ior);
nuclear@2 48
nuclear@2 49 if(entering) {
nuclear@2 50 ray.enter(mat_ior);
nuclear@2 51 } else {
nuclear@2 52 ray.leave();
nuclear@2 53 }
nuclear@2 54
nuclear@2 55 if(ray_mag < 0.0) {
nuclear@2 56 ray_mag = ray.dir.length();
nuclear@2 57 }
nuclear@2 58 ray.dir = (ray.dir / ray_mag).refraction(norm, ior) * ray_mag;
nuclear@2 59
nuclear@2 60 /* check TIR */
nuclear@2 61 if(dot_product(ray.dir, norm) > 0.0) {
nuclear@2 62 if(entering) {
nuclear@2 63 ray.leave();
nuclear@2 64 } else {
nuclear@2 65 ray.enter(mat_ior);
nuclear@2 66 }
nuclear@2 67 }
nuclear@2 68 return ray;
nuclear@2 69 }
nuclear@2 70 #endif /* __cplusplus */