diff options
| -rw-r--r-- | src/modules/ray/ray_object_plane.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/modules/ray/ray_object_plane.h b/src/modules/ray/ray_object_plane.h index 0be28f4..5fcc619 100644 --- a/src/modules/ray/ray_object_plane.h +++ b/src/modules/ray/ray_object_plane.h @@ -13,11 +13,15 @@ typedef struct ray_object_plane_t { ray_surface_t surface; ray_3f_t normal; float distance; + struct { + float primary_dot_plus; + } _prepared; } ray_object_plane_t; static void ray_object_plane_prepare(ray_object_plane_t *plane, ray_camera_t *camera) { + plane->_prepared.primary_dot_plus = (ray_3f_dot(&plane->normal, &camera->position) + plane->distance); } @@ -26,8 +30,12 @@ static inline int ray_object_plane_intersects_ray(ray_object_plane_t *plane, uns float d = ray_3f_dot(&plane->normal, &ray->direction); if (d >= 0.00001f) { - float distance = (ray_3f_dot(&plane->normal, &ray->origin) + plane->distance) / d; + float distance = plane->_prepared.primary_dot_plus; + if (depth != 1) + distance = (ray_3f_dot(&plane->normal, &ray->origin) + plane->distance); + + distance /= d; if (distance > 0) { *res_distance = distance; |