diff --git a/src/bvh.rs b/src/bvh.rs
index 5235790..e4f0bf6 100644
--- a/src/bvh.rs
+++ b/src/bvh.rs
@@ -40,6 +40,14 @@ impl<T:Copy+Eq+std::hash::Hash> BvhNode<T>{
 			},
 		}
 	}
+	pub fn into_visitor<F:FnMut(T)>(self,f:&mut F){
+		match self.content{
+			BvhNodeContent::Leaf(model)=>f(model),
+			BvhNodeContent::Branch(children)=>for child in children{
+				child.into_visitor(f)
+			},
+		}
+	}
 }
 
 pub fn generate_bvh<T:Copy+Eq+std::hash::Hash>(boxen:Vec<(T,Aabb)>)->BvhNode<T>{