ray: add ray_scene_prepare() object precomputing

Just embed a _prepared struct in the object where precomputed stuff can be
cached.  Gets called once before rendering, which ends up calling the
object-specific ray_object_$type_prepare() methods per object.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/modules/ray/ray_scene.c b/src/modules/ray/ray_scene.c
index e2c7f2c..87a77af 100644
--- a/src/modules/ray/ray_scene.c
+++ b/src/modules/ray/ray_scene.c
@@ -167,3 +167,13 @@ void ray_scene_render_fragment(ray_scene_t *scene, ray_camera_t *camera, fb_frag
 		buf += stride;
 	} while (ray_camera_frame_y_step(&frame));
 }
+
+
+/* prepare the scene for rendering, must be called whenever the scene has been changed. */
+void ray_scene_prepare(ray_scene_t *scene)
+{
+	unsigned	i;
+
+	for (i = 0; i < scene->n_objects; i++)
+		ray_object_prepare(&scene->objects[i]);
+}