add basic missiles

server/game/room/world/spawner.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const Asteroid = require('./asteroid.js');
+const Missile = require('./missile.js');
+
+class Spawner {
+	constructor(world) {
+		this.world = world;
+	}
+
+	spawnAsteroid(x, y, size) {
+		let pos = {
+			x: x,
+			y: y
+		};
+		let asteroid = new Asteroid(this.world, pos, size);
+		this.world.addAsteroid(asteroid);
+	}
+
+	spawnMissile(ship) {
+		let r = ship.pos.r;
+		let ox = Math.cos(r) * 0.7;
+		let oy = Math.sin(r) * 0.7;
+		let pos = {
+			x: ship.center.x + ox,
+			y: ship.center.y + oy,
+			r: r
+		};
+		let missile = new Missile(this.world, pos, ship);
+		this.world.addMissile(missile);
+	}
+}
+
+module.exports = Spawner;