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46 lines
1.2 KiB
46 lines
1.2 KiB
3 years ago
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import 'dart:math';
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import 'package:flame/components.dart';
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import 'package:flame_bloc/flame_bloc.dart';
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import 'package:pinball/flame/flame.dart';
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import 'package:pinball/game/game.dart';
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import 'package:pinball_components/pinball_components.dart';
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/// {@template score_effect_controller}
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/// A [ComponentController] responsible for adding [ScoreText]s
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/// on the game screen when the user earns points.
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/// {@endtemplate}
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class ScoreEffectController extends ComponentController<PinballGame>
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with BlocComponent<GameBloc, GameState> {
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/// {@macro score_effect_controller}
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ScoreEffectController(PinballGame component) : super(component);
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int _lastScore = 0;
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final _random = Random();
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double _noise() {
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return _random.nextDouble() * 5 * (_random.nextBool() ? -1 : 1);
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}
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@override
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bool listenWhen(GameState? previousState, GameState newState) {
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return previousState?.score != newState.score;
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}
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@override
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void onNewState(GameState state) {
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final newScore = state.score - _lastScore;
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_lastScore = state.score;
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component.add(
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ScoreText(
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text: newScore.toString(),
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position: Vector2(
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_noise(),
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_noise() + (-BoardDimensions.bounds.topCenter.dy + 10),
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),
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),
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);
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}
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}
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