Boxes behave similar to references. Auto deference in many situations, but sometimes a * is required.

src/main.rs

@@ -1,14 +1,22 @@
 use hello::geometry::Geometry;
 use hello::math::{Mat4x4, Point3};
 
+/*
 enum SceneGraphNode {
     Geometry(Mat4x4, Geometry),
     SubNode(Mat4x4, SceneGraphNode),
 }
+*/
 
 fn main() {
-    let p1 = Point3::new(0.0, 0.0, 0.0);
+    let v1 = 5;
-    let p2 = Point3::new(0.0, 0.0, 0.0);
+    let v2 = &v1;
+    let v3 = Box::new(v1);
 
-    let v = p1 - p2;
+    println!("v1: {}", v1);
+    println!("v2: {}", v2);
+    println!("v3: {}", v3);
+
+    assert_eq!(v1, *v2);
+    assert_eq!(v1, *v3);
 }