refactor(scenegraph): use RcCell<Node> instead of Rc<RefCell<Node>>

src/nodes/spatial.rs

@@ -1,15 +1,16 @@
-use super::core::{Node, NodeRef};
+use super::core::{Node, NodeData, NodeRef};
 use crate::core::client::Client;
 use anyhow::Result;
 use vek::mat::repr_c::row_major::Mat4;
 
-pub struct Spatial {
+pub struct Spatial<'a> {
+	node: &'a Node<'a>,
 	transform: Mat4<f32>,
 }
 
-impl<'a> Spatial {
-	pub fn new(transform: Mat4<f32>) -> Self {
-		Spatial { transform }
+impl<'a> Spatial<'a> {
+	pub fn new(node: &'a Node<'a>, transform: Mat4<f32>) -> Self {
+		Spatial { node, transform }
 	}
 
 	pub fn new_node(