flame/examples/lib/stories/parallax/no_fcs_parallax_example.dart

import 'package:flame/extensions.dart';
import 'package:flame/game.dart';
import 'package:flame/parallax.dart';

class NoFCSParallaxExample with Loadable, Game {
  static const String description = '''
    This examples serves to test the Parallax feature outside of the Flame
    Component System (FCS), use the other files in this folder for examples on
    how to use parallax with FCS.\n
    FCS is only used when you extend FlameGame, not when you only use the Game
    mixin, like we do in this example.
  ''';

  late Parallax parallax;

  @override
  Future<void> onLoad() async {
    await super.onLoad();
    parallax = await loadParallax(
      [
        ParallaxImageData('parallax/bg.png'),
        ParallaxImageData('parallax/mountain-far.png'),
        ParallaxImageData('parallax/mountains.png'),
        ParallaxImageData('parallax/trees.png'),
        ParallaxImageData('parallax/foreground-trees.png'),
      ],
      size: size,
      baseVelocity: Vector2(20, 0),
      velocityMultiplierDelta: Vector2(1.8, 1.0),
    );
  }

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

  @override
  void render(Canvas canvas) {
    parallax.render(canvas);
  }
}