add asteroids

server/game/room/world/asteroid.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const Body = require('./body.js');
+
+class Asteroid extends Body {
+	constructor(world, pos, size) {
+		super(world);
+
+		this.x = pos.x;
+		this.y = pos.y;
+		this.type = 'asteroid';
+
+		this.size = size;
+		this.frame = this.randomFrame();
+	}
+
+	randomFrame() {
+		let s = this.size;
+		let l = (Math.random() * 4 + 4) | 0;
+		let build = Array(l).fill().map(_ => Math.random() * Math.PI * 2);
+		build = build.sort().map(a => [Math.cos(a) * s, Math.sin(a) * s]);
+		return [build];
+	}
+
+	packTypeDelta() {
+		return [];
+	}
+
+	packFull() {
+		return {
+			type: 'asteroid',
+			id: this.id,
+			frame: this.frame,
+			delta: this.packDelta()
+		}
+	}
+}
+
+module.exports = Asteroid;