Update

twin_stick/Sources/lnx/GunController.hx

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+package lnx;
+
+import iron.Trait;
+import iron.system.Input;
+import iron.system.Audio;
+import iron.system.Time;
+import iron.object.Object;
+import iron.object.Transform;
+import leenkx.trait.physics.RigidBody;
+
+class GunController extends Trait {
+
+#if (!lnx_physics)
+	public function new() { super(); }
+#else
+
+	@prop
+	public var fireFreq = 0.15;
+	var firePoint:Transform;
+	var lastFire = 0.0;
+
+	var soundFire0:kha.Sound = null;
+	var soundFire1:kha.Sound = null;
+	var soundsLoaded = 0;
+
+	public function new() {
+		super();
+
+		iron.data.Data.getSound("fire0.wav", function(sound:kha.Sound) { soundFire0 = sound; soundsLoaded++; });
+		iron.data.Data.getSound("fire1.wav", function(sound:kha.Sound) { soundFire1 = sound; soundsLoaded++; });
+
+		var mouse = Input.getMouse();
+		var gamepad = Input.getGamepad(0);
+
+		notifyOnInit(function() {
+			firePoint = object.getChild('ProjectileSpawn').transform;
+		});
+
+		notifyOnUpdate(function() {
+			lastFire += Time.delta;
+			if (lastFire > fireFreq) {
+				if (mouse.down("left") || (gamepad != null && gamepad.down("r2") > 0.0)) {
+					shoot();
+				}
+			}
+		});
+	}
+
+	function shoot() {
+		// Spawn projectile
+		iron.Scene.active.spawnObject('Projectile', null, function(o:Object) {
+			o.transform.loc.x = firePoint.worldx();
+			o.transform.loc.y = firePoint.worldy();
+			o.transform.loc.z = firePoint.worldz();
+			o.transform.buildMatrix();
+			// Apply force
+			var rb:RigidBody = o.getTrait(RigidBody);
+			rb.syncTransform();
+			var look = object.transform.look().normalize();
+			rb.setLinearVelocity(look.x * 15, look.y * 15, look.z * 15);
+			// Remove projectile after a period of time
+			kha.Scheduler.addTimeTask(o.remove, 10);
+		});
+
+		// Play sound
+		if (soundsLoaded == 2) {
+			Audio.play(Std.random(3) == 0 ? soundFire1 : soundFire0);
+		}
+
+		lastFire = 0.0;
+	}
+#end
+}