2 files changed, 4 insertions, 3 deletions

diff --git a/src/scene/object_impl.h b/src/scene/object_impl.h
index 88f8e31..ead93f1 100644
--- a/src/scene/object_impl.h
+++ b/src/scene/object_impl.h
@@ -21,6 +21,7 @@ typedef struct MeshLink {
 typedef struct SceneObject {
   mesh_link_idx mesh_link; /// First MeshLink in the list.
   skeleton_idx  skeleton;  /// 0 for static objects.
-  node_idx      parent;    /// Parent SceneNode.
-  aabb3         box;
+  // TODO: Can we just store node indices in nodes, not the contained object?
+  node_idx parent; /// Parent SceneNode.
+  aabb3    box;
 } SceneObject;
diff --git a/src/scene/scene_memory.c b/src/scene/scene_memory.c
index d1d81a9..91880bb 100644
--- a/src/scene/scene_memory.c
+++ b/src/scene/scene_memory.c
@@ -73,7 +73,7 @@ void scene_mem_init() {
   mempool_make(&mem.skeletons);
 
   // Allocate dummy objects at index 0 to guarantee that no objects allocated by
-  // the caller map to index 0.
+  // the caller map to index 0. This allows 0 to be used as a sentinel.
   ALLOC_DUMMY(&mem.animas);
   ALLOC_DUMMY(&mem.animations);
   ALLOC_DUMMY(&mem.cameras);