Your First Flutter Flame Game

Mar 6 2024 · Dart 3, Flutter 3.10.1, Android Studio 2021.3.1 or higher, Visual Studo Code 1.7.4 or higher

Part 3: Collision Detection & Overlays

17. Add a Heads-Up Display

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While playing, it’s important to keep the player informed of what’s happening in the game at all times.

Demo

HUD

Open overlays/hud.dart to start.

class Hud extends PositionComponent with HasGameRef<MeteormaniaGame> {
}

late TextComponent _levelComponent;
late TextComponent _healthComponent;
late TextComponent _pointsComponent;

static const hudTextStyle = TextStyle(
  fontFamily: 'PressStart2P',
  color: Color.fromRGBO(255, 255, 255, 1),
);

@override
Future<void>? onLoad() async {
  return super.onLoad();
}

_levelComponent = TextComponent()

text: 'LVL ${game.manager.level}',

textRenderer: TextPaint(
  style: hudTextStyle.copyWith(
    fontSize: 18,
  ),
),

anchor: Anchor.center,

position: Vector2(
  GameConstants.cameraWidth / 2,
  GameConstants.cameraHeight - 32,
),

_healthComponent = TextComponent(
  text: 'Lives: ${game.manager.health}',
);

textRenderer: TextPaint(
  style: hudTextStyle.copyWith(
    fontSize: 14,
  ),
),

anchor: Anchor.centerLeft,
position: Vector2(32, 32),

_pointsComponent = TextComponent(
  text: 'Points: ${game.manager.points}',
  textRenderer: TextPaint(
    style: hudTextStyle.copyWith(
      fontSize: 14,
    ),
  ),
  anchor: Anchor.centerLeft,
  position: Vector2(32, 64),
);

addAll([
  _levelComponent,
  _healthComponent,
  _pointsComponent,
]);

@override
void update(double dt) {
  super.update(dt);
}

_levelComponent.text = 'LVL ${game.manager.level}';
_healthComponent.text = 'Lives: ${game.manager.health}';
_pointsComponent.text = 'Points: ${game.manager.points}';

if (game.manager.isGameOver) {
  removeFromParent();
}

MeteormaniaGame

In meteormania_game.dart, import your heads up display.

import 'overlays/hud.dart';

_world.add(Hud());