Switching physics for traffic

modules/world/traffic.h

@@ -9,7 +9,8 @@ protected:
 	List<Node *>::Element *spawner_e;
 	float max_spawn_distance;
 	float min_spawn_distance;
-	Vector3 delete_distance;
+	Vector3 delete_distance,
+		physics_distance;
 	Ref<RandomNumberGenerator> rnd;
 	float list_cooldown, spawn_cooldown;
 	RID immediate, instance;
@@ -18,6 +19,8 @@ protected:
 
 	void debug_traffic();
 	void control_traffic();
+	void vehicle_enable_physics(Spatial *obj);
+	void vehicle_disable_physics(Spatial *obj);
 public:
 	Traffic();
 	~Traffic();