diff options
| -rw-r--r-- | src/modules/ray/ray_scene.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/src/modules/ray/ray_scene.c b/src/modules/ray/ray_scene.c index b5d1e81..2df4a5d 100644 --- a/src/modules/ray/ray_scene.c +++ b/src/modules/ray/ray_scene.c @@ -12,7 +12,7 @@ #define MAX_RECURSION_DEPTH 4 -static ray_color_t trace_ray(ray_scene_t *scene, ray_ray_t *ray, unsigned depth); +static ray_color_t trace_ray(ray_scene_t *scene, ray_object_t *reflector, ray_ray_t *ray, unsigned depth); /* Determine if the ray is obstructed by an object within the supplied distance, for shadows */ @@ -124,7 +124,7 @@ static inline ray_color_t shade_ray(ray_scene_t *scene, ray_ray_t *ray, ray_obje reflected_ray.origin = intersection; reflected_ray.direction = ray_3f_sub(&ray->direction, &reflected_ray.direction); - reflection = trace_ray(scene, &reflected_ray, depth); + reflection = trace_ray(scene, object, &reflected_ray, depth); reflection = ray_3f_mult_scalar(&reflection, surface.specular); color = ray_3f_add(&color, &reflection); } @@ -136,7 +136,7 @@ static inline ray_color_t shade_ray(ray_scene_t *scene, ray_ray_t *ray, ray_obje } -static ray_color_t trace_ray(ray_scene_t *scene, ray_ray_t *ray, unsigned depth) +static ray_color_t trace_ray(ray_scene_t *scene, ray_object_t *reflector, ray_ray_t *ray, unsigned depth) { ray_object_t *nearest_object = NULL; float nearest_object_distance = INFINITY; @@ -146,14 +146,20 @@ static ray_color_t trace_ray(ray_scene_t *scene, ray_ray_t *ray, unsigned depth) depth++; for (i = 0; i < scene->n_objects; i++) { - float distance; + ray_object_t *object = &scene->objects[i]; + float distance; + + /* Don't bother checking if a reflected ray intersects the object reflecting it, + * reflector = NULL for primary rays, which will never compare as true here. */ + if (object == reflector) + continue; /* Does this ray intersect object? */ - if (ray_object_intersects_ray(&scene->objects[i], depth, ray, &distance)) { + if (ray_object_intersects_ray(object, depth, ray, &distance)) { /* Is it the nearest intersection? */ if (distance < nearest_object_distance) { - nearest_object = &scene->objects[i]; + nearest_object = object; nearest_object_distance = distance; } } @@ -178,7 +184,7 @@ void ray_scene_render_fragment(ray_scene_t *scene, ray_camera_t *camera, fb_frag ray_camera_frame_begin(camera, fragment, &ray, &frame); do { do { - *buf = ray_color_to_uint32_rgb(trace_ray(scene, &ray, 0)); + *buf = ray_color_to_uint32_rgb(trace_ray(scene, NULL, &ray, 0)); buf++; } while (ray_camera_frame_x_step(&frame)); |