新增box复合体 修复vector2运算问题

demo/src/Main.ts

@@ -98,6 +98,7 @@ class Main extends eui.UILayer {
             new Vector2(10, 10),
             new Vector2(0, 10),
             new Vector2(0, 0)]));
+        player.addComponent(new VerletDemo());
         player.addComponent(new SpawnComponent(EnemyType.worm));
         // console.log(player.transform.position);
     }