refactor: store weak client in the nodes

src/core/scenegraph.rs

@@ -3,7 +3,7 @@ use crate::nodes::spatial::Spatial;
 use anyhow::Result;
 use libstardustxr::scenegraph;
 use libstardustxr::scenegraph::ScenegraphError;
-use rccell::{RcCell, WeakCell};
+use rccell::RcCell;
 use std::collections::HashMap;
 
 pub struct Scenegraph<'a> {
@@ -11,7 +11,7 @@ pub struct Scenegraph<'a> {
 }
 
 impl<'a> Scenegraph<'a> {
-	pub fn new(client: &mut Client<'a>) -> Self {
+	pub fn new(client: RcCell<Client<'a>>) -> Self {
 		// root: Spatial::new(Some(client), "/", Default::default()),
 		// hmd: Spatial::new(Some(client), "/hmd", Default::default()),
 		Scenegraph {
@@ -20,6 +20,14 @@ impl<'a> Scenegraph<'a> {
 	}
 }
 
+impl<'a> Default for Scenegraph<'a> {
+	fn default() -> Self {
+		Scenegraph {
+			spatial_nodes: HashMap::new(),
+		}
+	}
+}
+
 impl<'a> scenegraph::Scenegraph for Scenegraph<'a> {
 	fn send_signal(&self, path: &str, method: &str, data: &[u8]) -> Result<(), ScenegraphError> {
 		self.spatial_nodes