Update

race_track/Sources/lnx/TrackTimer.hx

@@ -0,0 +1,55 @@
+package lnx;
+
+import iron.Scene;
+import iron.object.Transform;
+using leenkx.object.TransformExtension;
+
+class TrackTimer extends iron.Trait {
+
+	var time = 0.0;
+	var running = false;
+	var finished = false;
+	var triggers:Array<Transform> = [];
+
+	public function new() {
+		super();
+
+		notifyOnInit(function() {
+			var canvas = Scene.active.getTrait(leenkx.trait.internal.CanvasScript);
+			var t = object.transform;
+
+			// Retrieve triggers
+			var t0 = Scene.active.getChild("Trigger0").transform; // Start line
+			var t1 = Scene.active.getChild("Trigger1").transform;
+			var t2 = Scene.active.getChild("Trigger2").transform;
+			var t3 = Scene.active.getChild("Trigger3").transform;
+
+			notifyOnUpdate(function() {
+
+				if (!running && !finished) {
+					// Start line crossed, begin lap
+					running = t.overlap(t0);
+				}
+				else {
+					// Update timer
+					if (!finished) {
+						time += iron.system.Time.delta;
+						var s = Std.int(time);
+						var ms = Std.int((time - s) * 100);
+						canvas.getElement("Time").text = s + "." + ms;
+					}
+
+					// Mark touched triggers
+					if (t.overlap(t1) && triggers.indexOf(t1) == -1) triggers.push(t1);
+					if (t.overlap(t2) && triggers.indexOf(t2) == -1) triggers.push(t2);
+					if (t.overlap(t3) && triggers.indexOf(t3) == -1) triggers.push(t3);
+
+					// Crossed finish line
+					if (t.overlap(t0) && triggers.length == 3) {
+						finished = true;
+					}
+				}
+			});
+		});
+	}
+}