feat: added alien bumpers

packages/pinball_components/lib/gen/assets.gen.dart

@@ -10,6 +10,9 @@ import 'package:flutter/widgets.dart';
 class $AssetsImagesGen {
   const $AssetsImagesGen();
 
+  $AssetsImagesAlienBumperGen get alienBumper =>
+      const $AssetsImagesAlienBumperGen();
+
   /// File path: assets/images/ball.png
   AssetGenImage get ball => const AssetGenImage('assets/images/ball.png');
 
@@ -35,6 +38,13 @@ class $AssetsImagesGen {
       const $AssetsImagesSparkyBumperGen();
 }
 
+class $AssetsImagesAlienBumperGen {
+  const $AssetsImagesAlienBumperGen();
+
+  $AssetsImagesAlienBumperAGen get a => const $AssetsImagesAlienBumperAGen();
+  $AssetsImagesAlienBumperBGen get b => const $AssetsImagesAlienBumperBGen();
+}
+
 class $AssetsImagesBaseboardGen {
   const $AssetsImagesBaseboardGen();
 
@@ -173,6 +183,30 @@ class $AssetsImagesSparkyBumperGen {
   $AssetsImagesSparkyBumperCGen get c => const $AssetsImagesSparkyBumperCGen();
 }
 
+class $AssetsImagesAlienBumperAGen {
+  const $AssetsImagesAlienBumperAGen();
+
+  /// File path: assets/images/alien_bumper/a/active.png
+  AssetGenImage get active =>
+      const AssetGenImage('assets/images/alien_bumper/a/active.png');
+
+  /// File path: assets/images/alien_bumper/a/inactive.png
+  AssetGenImage get inactive =>
+      const AssetGenImage('assets/images/alien_bumper/a/inactive.png');
+}
+
+class $AssetsImagesAlienBumperBGen {
+  const $AssetsImagesAlienBumperBGen();
+
+  /// File path: assets/images/alien_bumper/b/active.png
+  AssetGenImage get active =>
+      const AssetGenImage('assets/images/alien_bumper/b/active.png');
+
+  /// File path: assets/images/alien_bumper/b/inactive.png
+  AssetGenImage get inactive =>
+      const AssetGenImage('assets/images/alien_bumper/b/inactive.png');
+}
+
 class $AssetsImagesDashBumperAGen {
   const $AssetsImagesDashBumperAGen();
 

packages/pinball_components/lib/src/components/alien_bumper.dart

@@ -0,0 +1,112 @@
+import 'dart:math' as math;
+
+import 'package:flame/components.dart';
+import 'package:flame_forge2d/flame_forge2d.dart';
+import 'package:pinball_components/pinball_components.dart';
+
+/// {@template alien_bumper}
+/// Bumper for Alien area.
+/// {@endtemplate}
+// TODO(ruimiguel): refactor later to unify with DashBumpers.
+class AlienBumper extends BodyComponent with InitialPosition {
+  /// {@macro alien_bumper}
+  AlienBumper._({
+    required double majorRadius,
+    required double minorRadius,
+    required String activeAssetPath,
+    required String inactiveAssetPath,
+    required SpriteComponent spriteComponent,
+  })  : _majorRadius = majorRadius,
+        _minorRadius = minorRadius,
+        _activeAssetPath = activeAssetPath,
+        _inactiveAssetPath = inactiveAssetPath,
+        _spriteComponent = spriteComponent;
+
+  /// {@macro alien_bumper}
+  AlienBumper.a()
+      : this._(
+          majorRadius: 2.9,
+          minorRadius: 2.1,
+          activeAssetPath: Assets.images.alienBumper.a.active.keyName,
+          inactiveAssetPath: Assets.images.alienBumper.a.inactive.keyName,
+          spriteComponent: SpriteComponent(
+            anchor: Anchor.center,
+            position: Vector2(0, -0.25),
+          ),
+        );
+
+  /// {@macro alien_bumper}
+  AlienBumper.b()
+      : this._(
+          majorRadius: 2.85,
+          minorRadius: 2,
+          activeAssetPath: Assets.images.alienBumper.b.active.keyName,
+          inactiveAssetPath: Assets.images.alienBumper.b.inactive.keyName,
+          spriteComponent: SpriteComponent(
+            anchor: Anchor.center,
+            position: Vector2(0, -0.35),
+          ),
+        );
+
+  final double _majorRadius;
+  final double _minorRadius;
+  final String _activeAssetPath;
+  late final Sprite _activeSprite;
+  final String _inactiveAssetPath;
+  late final Sprite _inactiveSprite;
+  final SpriteComponent _spriteComponent;
+
+  @override
+  Future<void> onLoad() async {
+    await super.onLoad();
+    await _loadSprites();
+
+    // TODO(erickzanardo): Look into using onNewState instead.
+    // Currently doing: onNewState(gameRef.read<GameState>()) will throw an
+    // `Exception: build context is not available yet`
+    deactivate();
+    await add(_spriteComponent);
+  }
+
+  @override
+  Body createBody() {
+    renderBody = false;
+
+    final shape = EllipseShape(
+      center: Vector2.zero(),
+      majorRadius: _majorRadius,
+      minorRadius: _minorRadius,
+    )..rotate(math.pi / 1.9);
+    final fixtureDef = FixtureDef(shape)
+      ..friction = 0
+      ..restitution = 4;
+
+    final bodyDef = BodyDef()
+      ..position = initialPosition
+      ..userData = this;
+
+    return world.createBody(bodyDef)..createFixture(fixtureDef);
+  }
+
+  Future<void> _loadSprites() async {
+    // TODO(alestiago): I think ideally we would like to do:
+    // Sprite(path).load so we don't require to store the activeAssetPath and
+    // the inactive assetPath.
+    _inactiveSprite = await gameRef.loadSprite(_inactiveAssetPath);
+    _activeSprite = await gameRef.loadSprite(_activeAssetPath);
+  }
+
+  /// Activates the [AlienBumper].
+  void activate() {
+    _spriteComponent
+      ..sprite = _activeSprite
+      ..size = _activeSprite.originalSize / 10;
+  }
+
+  /// Deactivates the [AlienBumper].
+  void deactivate() {
+    _spriteComponent
+      ..sprite = _inactiveSprite
+      ..size = _inactiveSprite.originalSize / 10;
+  }
+}

packages/pinball_components/lib/src/components/components.dart

@@ -1,3 +1,4 @@
+export 'alien_bumper.dart';
 export 'ball.dart';
 export 'baseboard.dart';
 export 'board_dimensions.dart';

packages/pinball_components/pubspec.yaml

@@ -43,6 +43,8 @@ flutter:
     - assets/images/sparky_bumper/a/
     - assets/images/sparky_bumper/b/
     - assets/images/sparky_bumper/c/
+    - assets/images/alien_bumper/a/
+    - assets/images/alien_bumper/b/
 
 flutter_gen:
   line_length: 80