From 524db0cf19648e3c7c78d3e73103b7a0bdcd6bfc Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Wed, 18 Jan 2017 17:14:52 -0800 Subject: *: move source into src/ subdir Restoring some organizational sanity since adopting autotools. --- src/modules/ray/ray_object_plane.h | 46 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/modules/ray/ray_object_plane.h (limited to 'src/modules/ray/ray_object_plane.h') diff --git a/src/modules/ray/ray_object_plane.h b/src/modules/ray/ray_object_plane.h new file mode 100644 index 0000000..b33f342 --- /dev/null +++ b/src/modules/ray/ray_object_plane.h @@ -0,0 +1,46 @@ +#ifndef _RAY_OBJECT_PLANE_H +#define _RAY_OBJECT_PLANE_H + +#include "ray_object_type.h" +#include "ray_ray.h" +#include "ray_surface.h" + + +typedef struct ray_object_plane_t { + ray_object_type_t type; + ray_surface_t surface; + ray_3f_t normal; + float distance; +} ray_object_plane_t; + + +static inline int ray_object_plane_intersects_ray(ray_object_plane_t *plane, ray_ray_t *ray, float *res_distance) +{ + float d = ray_3f_dot(&plane->normal, &ray->direction); + + if (d != 0) { + float distance = -(ray_3f_dot(&plane->normal, &ray->origin) + plane->distance) / d; + + if (distance > 0) { + *res_distance = distance; + + return 1; + } + } + + return 0; +} + + +static inline ray_3f_t ray_object_plane_normal(ray_object_plane_t *plane, ray_3f_t *point) +{ + return plane->normal; +} + + +static inline ray_surface_t ray_object_plane_surface(ray_object_plane_t *plane, ray_3f_t *point) +{ + return plane->surface; +} + +#endif -- cgit v1.2.1