1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vmath/ray.h	Sat Sep 19 05:51:51 2015 +0300
     1.3 @@ -0,0 +1,73 @@
     1.4 +/*
     1.5 +libvmath - a vector math library
     1.6 +Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
     1.7 +
     1.8 +This program is free software: you can redistribute it and/or modify
     1.9 +it under the terms of the GNU Lesser General Public License as published
    1.10 +by the Free Software Foundation, either version 3 of the License, or
    1.11 +(at your option) any later version.
    1.12 +
    1.13 +This program is distributed in the hope that it will be useful,
    1.14 +but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 +GNU Lesser General Public License for more details.
    1.17 +
    1.18 +You should have received a copy of the GNU Lesser General Public License
    1.19 +along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 +*/
    1.21 +
    1.22 +#ifndef VMATH_RAY_H_
    1.23 +#define VMATH_RAY_H_
    1.24 +
    1.25 +#include "matrix.h"
    1.26 +#include "vector.h"
    1.27 +
    1.28 +typedef struct {
    1.29 +	vec3_t origin, dir;
    1.30 +} ray_t;
    1.31 +
    1.32 +#ifdef __cplusplus
    1.33 +extern "C" {
    1.34 +#endif	/* __cplusplus */
    1.35 +
    1.36 +static inline ray_t ray_cons(vec3_t origin, vec3_t dir);
    1.37 +ray_t ray_transform(ray_t r, mat4_t m);
    1.38 +
    1.39 +#ifdef __cplusplus
    1.40 +}	/* __cplusplus */
    1.41 +
    1.42 +#include <stack>
    1.43 +
    1.44 +class Ray {
    1.45 +private:
    1.46 +	std::stack<scalar_t> ior_stack;
    1.47 +
    1.48 +public:
    1.49 +	/* enviornmental index of refraction, normally 1.0 */
    1.50 +	static scalar_t env_ior;
    1.51 +	
    1.52 +	Vector3 origin, dir;
    1.53 +	scalar_t energy;
    1.54 +	int iter;
    1.55 +	scalar_t ior;
    1.56 +	long time;
    1.57 +
    1.58 +	Ray();
    1.59 +	Ray(const Vector3 &origin, const Vector3 &dir);
    1.60 +
    1.61 +	void transform(const Matrix4x4 &xform);
    1.62 +	Ray transformed(const Matrix4x4 &xform) const;
    1.63 +
    1.64 +	void enter(scalar_t new_ior);
    1.65 +	void leave();
    1.66 +
    1.67 +	scalar_t calc_ior(bool entering, scalar_t mat_ior = 1.0) const;
    1.68 +};
    1.69 +
    1.70 +inline Ray reflect_ray(const Ray &inray, const Vector3 &norm);
    1.71 +inline Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t ior, bool entering, scalar_t ray_mag = -1.0);
    1.72 +#endif	/* __cplusplus */
    1.73 +
    1.74 +#include "ray.inl"
    1.75 +
    1.76 +#endif	/* VMATH_RAY_H_ */