feat: adding score effects

lib/game/components/components.dart

@@ -6,6 +6,7 @@ export 'controlled_flipper.dart';
 export 'flutter_forest.dart';
 export 'game_flow_controller.dart';
 export 'plunger.dart';
+export 'score_effect_controller.dart';
 export 'score_points.dart';
 export 'sparky_fire_zone.dart';
 export 'wall.dart';

lib/game/components/score_effect_controller.dart

@@ -0,0 +1,84 @@
+import 'dart:async';
+import 'dart:math';
+
+import 'package:flame/components.dart';
+import 'package:flame/effects.dart';
+import 'package:flame_bloc/flame_bloc.dart';
+import 'package:flutter/material.dart';
+import 'package:pinball/flame/flame.dart';
+import 'package:pinball/game/game.dart';
+import 'package:pinball_components/pinball_components.dart';
+
+///
+class ScoreEffectController extends ComponentController<PinballGame>
+    with BlocComponent<GameBloc, GameState> {
+  ///
+  ScoreEffectController(PinballGame component) : super(component);
+
+  int _lastScore = 0;
+  final _rng = Random();
+
+  double _noise() {
+    return _rng.nextDouble() * 5 * (_rng.nextBool() ? -1 : 1);
+  }
+
+  @override
+  bool listenWhen(GameState? previousState, GameState newState) {
+    return previousState?.score != newState.score;
+  }
+
+  @override
+  void onNewState(GameState state) {
+    final newScore = state.score - _lastScore;
+
+    component.add(
+      _Text(
+        text: newScore.toString(),
+        position: Vector2(
+            _noise(),
+            _noise() + (-BoardDimensions.bounds.topCenter.dy + 10),
+        ),
+      ),
+    );
+
+    _lastScore = state.score;
+  }
+}
+
+class _Text extends TextComponent {
+  _Text({
+    required String text,
+    required Vector2 position,
+  }) : super(
+          text: text,
+          position: position,
+          anchor: Anchor.center,
+          priority: 100,
+        );
+  late final Effect _effect;
+
+  @override
+  Future<void> onLoad() async {
+    textRenderer = TextPaint(
+      style: const TextStyle(color: Colors.pink, fontSize: 4),
+    );
+
+    unawaited(
+      add(
+        _effect = MoveEffect.by(
+          Vector2(0, -5),
+          EffectController(duration: 1),
+        ),
+      ),
+    );
+  }
+
+  @override
+  void update(double dt) {
+    super.update(dt);
+
+    if (_effect.controller.completed) {
+      removeFromParent();
+    }
+  }
+}

lib/game/pinball_game.dart

@@ -38,6 +38,7 @@ class PinballGame extends Forge2DGame
   Future<void> onLoad() async {
     _addContactCallbacks();
 
+    unawaited(add(ScoreEffectController(this)));
     unawaited(add(gameFlowController = GameFlowController(this)));
     unawaited(add(CameraController(this)));
     unawaited(add(Backboard(position: Vector2(0, -88))));