diff options
Diffstat (limited to 'src/libs/ray/ray_render_object_plane.h')
-rw-r--r-- | src/libs/ray/ray_render_object_plane.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/libs/ray/ray_render_object_plane.h b/src/libs/ray/ray_render_object_plane.h new file mode 100644 index 0000000..6e00089 --- /dev/null +++ b/src/libs/ray/ray_render_object_plane.h @@ -0,0 +1,61 @@ +#ifndef _RAY_RENDER_OBJECT_PLANE_H +#define _RAY_RENDER_OBJECT_PLANE_H + +#include "ray_3f.h" +#include "ray_camera.h" +#include "ray_object_plane.h" +#include "ray_object_type.h" +#include "ray_ray.h" +#include "ray_surface.h" + + +typedef struct ray_render_object_plane_t { + ray_object_plane_t object; + float primary_dot_plus; +} ray_render_object_plane_t; + + +static ray_render_object_plane_t ray_render_object_plane_prepare(const ray_object_plane_t *plane, const ray_camera_t *camera) +{ + ray_render_object_plane_t prepared = { .object = *plane }; + + prepared.primary_dot_plus = ray_3f_dot(&plane->normal, &camera->position) + plane->distance; + + return prepared; +} + + +static inline int ray_render_object_plane_intersects_ray(ray_render_object_plane_t *plane, unsigned depth, ray_ray_t *ray, float *res_distance) +{ + float d = ray_3f_dot(&plane->object.normal, &ray->direction); + + if (d < 0.0f) { + float distance = plane->primary_dot_plus; + + if (depth) + distance = (ray_3f_dot(&plane->object.normal, &ray->origin) + plane->object.distance); + + distance /= -d; + if (distance > 0.0f) { + *res_distance = distance; + + return 1; + } + } + + return 0; +} + + +static inline ray_3f_t ray_render_object_plane_normal(ray_render_object_plane_t *plane, ray_3f_t *point) +{ + return plane->object.normal; +} + + +static inline ray_surface_t ray_render_object_plane_surface(ray_render_object_plane_t *plane, ray_3f_t *point) +{ + return plane->object.surface; +} + +#endif |