1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vmath/ray.h	Thu Sep 08 08:30:42 2011 +0300
     1.3 @@ -0,0 +1,55 @@
     1.4 +#ifndef VMATH_RAY_H_
     1.5 +#define VMATH_RAY_H_
     1.6 +
     1.7 +#include "matrix.h"
     1.8 +#include "vector.h"
     1.9 +
    1.10 +typedef struct {
    1.11 +	vec3_t origin, dir;
    1.12 +} ray_t;
    1.13 +
    1.14 +#ifdef __cplusplus
    1.15 +extern "C" {
    1.16 +#endif	/* __cplusplus */
    1.17 +
    1.18 +static inline ray_t ray_cons(vec3_t origin, vec3_t dir);
    1.19 +ray_t ray_transform(ray_t r, mat4_t m);
    1.20 +
    1.21 +#ifdef __cplusplus
    1.22 +}	/* __cplusplus */
    1.23 +
    1.24 +#include <stack>
    1.25 +
    1.26 +class Ray {
    1.27 +private:
    1.28 +	std::stack<scalar_t> ior_stack;
    1.29 +
    1.30 +public:
    1.31 +	/* enviornmental index of refraction, normally 1.0 */
    1.32 +	static scalar_t env_ior;
    1.33 +	
    1.34 +	Vector3 origin, dir;
    1.35 +	scalar_t energy;
    1.36 +	int iter;
    1.37 +	scalar_t ior;
    1.38 +	long time;
    1.39 +
    1.40 +	Ray();
    1.41 +	Ray(const Vector3 &origin, const Vector3 &dir);
    1.42 +
    1.43 +	void transform(const Matrix4x4 &xform);
    1.44 +	Ray transformed(const Matrix4x4 &xform) const;
    1.45 +
    1.46 +	void enter(scalar_t new_ior);
    1.47 +	void leave();
    1.48 +
    1.49 +	scalar_t calc_ior(bool entering, scalar_t mat_ior = 1.0) const;
    1.50 +};
    1.51 +
    1.52 +inline Ray reflect_ray(const Ray &inray, const Vector3 &norm);
    1.53 +inline Ray refract_ray(const Ray &inray, const Vector3 &norm, scalar_t ior, bool entering, scalar_t ray_mag = -1.0);
    1.54 +#endif	/* __cplusplus */
    1.55 +
    1.56 +#include "ray.inl"
    1.57 +
    1.58 +#endif	/* VMATH_RAY_H_ */