add basic updating to client on physics

server/game/room/world/body.js

@@ -1,10 +1,28 @@
 'use strict';
 
+const uuid = require('uuid');
+
 class Body {
-	constructor() {
+	constructor(world) {
+		this.x = 0;
+		this.y = 0;
+		this.r = 0;
 		this.b2body = false;
 		this.type = 'dynamic';
 		this.health = 1;
+		this.world = world;
+		this.id = uuid.v4().slice(0, 8);
+	}
+
+	applyDelta() {
+		this.world.applyDelta(this.id, this.pack());
+	}
+
+	pack() {
+		let pos = this.b2body.GetPosition();
+		let rot = this.b2body.GetAngleRadians();
+
+		return [pos.x, pos.y, rot];
 	}
 }