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];
 	}
 }
 

server/game/room/world/index.js

@@ -15,23 +15,45 @@ class World {
 
 	addPlayer(player) {
 		this.players.add(player);
-		let ship = new Ship(player);
+		let ship = new Ship(this, player);
+		player.ship = ship;
 		this.ships.set(player, ship);
+		this.bodies.add(ship);
 		this.physics.createBody(ship);
 	}
 
+	applyDelta(body, data) {
+		this.players.forEach(player => player.delta[body] = data);
+	}
+
 	removePlayer(player) {
-		removeBody(player.ship);
+		this.removeBody(player.ship);
 		this.ships.delete(player);
 		this.players.delete(player);
 	}
 
 	removeBody(body) {
-		// Remove from Box2d.
+		this.physics.toRemove.push(body);
+		this.bodies.delete(body);
+		this.ships.delete(body);
+		this.structures.delete(body);
+		this.asteroids.delete(body);
 	}
 
-	tick() {
+	start() {
+		this.interval = setInterval(_ => this.tick(this), 1 / 60);
+	}
 
+	stop() {
+		clearInterval(this.interval);
+	}
+
+	tick(self) {
+		self.physics.step();
+
+		if (Math.random() < 0.001) {
+			self.bodies.forEach(body => body.applyDelta());
+		}
 	}
 }
 

server/game/room/world/physics.js

@@ -11,6 +11,7 @@ const b2Vec2 = Box2D.b2Vec2;
 class Physics {
 	constructor() {
 		this.world = new Box2D.b2World(new b2Vec2(0, 0), false);
+		this.toRemove = [];
 	}
 
 	createBody(body) {
@@ -19,7 +20,7 @@ class Physics {
 		bodyDef.position = new b2Vec2(body.x || 0, body.y || 0);
 		bodyDef.fixedRotation = false;
 		bodyDef.active = true;
-		bodyDef.linearVelocity = new b2Vec2(body.xvel || 0, body.yvel || 0);
+		bodyDef.linearVelocity = new b2Vec2(body.xvel || 0.05, body.yvel || 0);
 		bodyDef.angularVelocity = body.rvel || 0;
 		bodyDef.type = body.type == 'static' ?
 			Box2D.b2Body.b2_staticBody : Box2D.b2Body.b2_dynamicBody;
@@ -31,7 +32,7 @@ class Physics {
 		fixtureDef.restitution = 0;
 
 		for (var poly of body.structure) {
-			poly.map(vertex => new b2Vec2(vertex[0], vertex[1]));
+			poly = poly.map(vertex => new b2Vec2(vertex[0], vertex[1]));
 			fixtureDef.shape = new Box2D.b2PolygonShape();
 			fixtureDef.shape.SetAsArray(poly, poly.length);
 			b2body.CreateFixture(fixtureDef);
@@ -42,6 +43,13 @@ class Physics {
 
 	step() {
 		this.world.Step(1, 5, 1 / 60);
+
+		for (var i = 0; i < this.toRemove.length; i++) {
+			this.world.DestroyBody(this.toRemove[i].b2body);
+			console.log(this.world.GetBodyList());
+		}
+
+		this.toRemove = [];
 	}
 }
 

server/game/room/world/ship.js

@@ -6,8 +6,8 @@ const hulls = require('./traits/hulls.json');
 const Body = require('./body.js');
 
 class Ship extends Body {
-	constructor(player, build) {
-		super();
+	constructor(world, player, build) {
+		super(world);
 
 		this.build = build || defaults.spawnShip.build;
 		this.player = player;