Draw player position line a bit better

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/main.dart

@@ -69,30 +69,42 @@ class _PlayerState extends State<Player> {
   double get playerDeltaX => math.cos(playerAngle) * 5;
   double get playerDeltaY => math.sin(playerAngle) * 5;
 
+  Offset get playerDelta => Offset(playerDeltaX, playerDeltaY);
+
   Offset playerPosition = const Offset(1.5 * mapSize, 1.5 * mapSize);
 
   @override
   Widget build(BuildContext context) {
     return CustomPaint(
-      painter: PlayerPainter(offset: playerPosition),
+      painter: PlayerPainter(offset: playerPosition, delta: playerDelta),
     );
   }
 }
 
 class PlayerPainter extends CustomPainter {
   final Offset offset;
+  final Offset delta;
 
   const new({
     required this.offset,
+    required this.delta,
   });
 
   @override
   void paint(Canvas canvas, Size size) {
-    final paintYelow = Paint()..color = Colors.yellow;
-
+    // Player dot
     canvas.drawRect(
       Rect.fromLTWH(offset.dx, offset.dy, 8, 8),
-      paintYelow,
+      Paint()..color = Colors.yellow,
+    );
+
+    // Player direction line
+    canvas.drawLine(
+      offset + const Offset(4, 4),
+      delta * 5,
+      Paint()
+        ..color = Colors.yellow
+        ..strokeWidth = 2,
     );
   }