add lasers

server/game/room/world/body/turret/discharge/discharge.js

@@ -0,0 +1,49 @@
+'use strict';
+
+class Discharge {
+	constructor(fixture, data) {
+		this.x = data.x;
+		this.y = data.y;
+		this.xvel = data.xvel;
+		this.yvel = data.yvel;
+		this.r = data.r;
+
+		this.lifetime = data.lifetime || 100;
+		this.fixture = fixture;
+
+		// Might just make it this.world later if it turns out I need it more.
+		this.id = this.fixture.body.world.room.generateId();
+	}
+
+	destroy() {
+		this.fixture.body.world.removeDischarge(this);
+	}
+
+	packDelta() {
+		// TODO: Implement some sort of delta interface for discharges that is
+		// derived from the fixture so it's efficient.
+		return [this.id, this.x, this.y];
+	}
+
+	packFull() {
+		// TODO: Create creation interface using fixture then send this as
+		// an array.
+		return {
+			form: 'discharge',
+			id: this.id,
+			x: this.x,
+			y: this.y,
+			r: this.r,
+			xvel: this.xvel,
+			yvel: this.yvel,
+			delta: this.packDelta()
+		}
+	}
+
+	tick() {
+		if (this.lifetime-- <= 0)
+			this.destroy();
+	}
+}
+
+module.exports = Discharge;