feat: sandbox for alien bumpers

packages/pinball_components/sandbox/lib/main.dart

@@ -23,5 +23,6 @@ void main() {
   addKickerStories(dashbook);
   addSlingshotStories(dashbook);
   addSparkyBumperStories(dashbook);
+  addAlienBumperStories(dashbook);
   runApp(dashbook);
 }

packages/pinball_components/sandbox/lib/stories/alien_bumper/alien_bumper_game.dart

@@ -0,0 +1,42 @@
+import 'dart:async';
+
+import 'package:flame/extensions.dart';
+import 'package:pinball_components/pinball_components.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/ball/basic_ball_game.dart';
+
+class AlienBumperGame extends BasicBallGame {
+  AlienBumperGame({
+    required this.trace,
+  }) : super(color: const Color(0xFF0000FF));
+
+  static const info = '''
+    Shows how a AlienBumper is rendered.
+
+    Activate the "trace" parameter to overlay the body.
+''';
+
+  final bool trace;
+
+  @override
+  Future<void> onLoad() async {
+    await super.onLoad();
+
+    final center = screenToWorld(camera.viewport.canvasSize! / 2);
+    final alienBumperA = AlienBumper.a()
+      ..initialPosition = Vector2(center.x - 20, center.y - 20)
+      ..priority = 1;
+    final alienBumperB = AlienBumper.b()
+      ..initialPosition = Vector2(center.x - 10, center.y + 10)
+      ..priority = 1;
+    await addAll([
+      alienBumperA,
+      alienBumperB,
+    ]);
+
+    if (trace) {
+      alienBumperA.trace();
+      alienBumperB.trace();
+    }
+  }
+}

packages/pinball_components/sandbox/lib/stories/alien_bumper/stories.dart

@@ -0,0 +1,17 @@
+import 'package:dashbook/dashbook.dart';
+import 'package:flame/game.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/alien_bumper/alien_bumper_game.dart';
+
+void addAlienBumperStories(Dashbook dashbook) {
+  dashbook.storiesOf('Alien Bumpers').add(
+        'Basic',
+        (context) => GameWidget(
+          game: AlienBumperGame(
+            trace: context.boolProperty('Trace', true),
+          ),
+        ),
+        codeLink: buildSourceLink('alien_bumper/basic.dart'),
+        info: AlienBumperGame.info,
+      );
+}

packages/pinball_components/sandbox/lib/stories/stories.dart

@@ -1,3 +1,4 @@
+export 'alien_bumper/stories.dart';
 export 'ball/stories.dart';
 export 'baseboard/stories.dart';
 export 'chrome_dino/stories.dart';