pinball/lib/game/components/wall.dart

// ignore_for_file: avoid_renaming_method_parameters

import 'package:flame_forge2d/flame_forge2d.dart';
import 'package:pinball/game/components/components.dart';

/// {@template wall}
/// A continuous generic and [BodyType.static] barrier that divides a game area.
/// {@endtemplate}
// TODO(alestiago): Remove [Wall] for [Pathway.straight].
class Wall extends BodyComponent {
  /// {@macro wall}
  Wall({
    required this.start,
    required this.end,
  });

  /// The [start] of the [Wall].
  final Vector2 start;

  /// The [end] of the [Wall].
  final Vector2 end;

  @override
  Body createBody() {
    final shape = EdgeShape()..set(start, end);

    final fixtureDef = FixtureDef(shape)
      ..restitution = 0.1
      ..friction = 0.3;

    final bodyDef = BodyDef()
      ..userData = this
      ..position = Vector2.zero()
      ..type = BodyType.static;

    return world.createBody(bodyDef)..createFixture(fixtureDef);
  }
}

/// Create top, left, and right [Wall]s for the game board.
List<Wall> createBoundaries(Forge2DGame game) {
  final topLeft = Vector2.zero();
  final bottomRight = game.screenToWorld(game.camera.viewport.effectiveSize);
  final topRight = Vector2(bottomRight.x, topLeft.y);
  final bottomLeft = Vector2(topLeft.x, bottomRight.y);

  return [
    Wall(start: topLeft, end: topRight),
    Wall(start: topRight, end: bottomRight),
    Wall(start: bottomLeft, end: topLeft),
  ];
}

/// {@template bottom_wall}
/// [Wall] located at the bottom of the board.
///
/// Collisions with [BottomWall] are listened by
/// [BottomWallBallContactCallback].
/// {@endtemplate}
class BottomWall extends Wall {
  /// {@macro bottom_wall}
  BottomWall(Forge2DGame game)
      : super(
          start: game.screenToWorld(game.camera.viewport.effectiveSize),
          end: Vector2(
            0,
            game.screenToWorld(game.camera.viewport.effectiveSize).y,
          ),
        );
}

/// {@template bottom_wall_ball_contact_callback}
/// Listens when a [Ball] falls into a [BottomWall].
/// {@endtemplate}
class BottomWallBallContactCallback extends ContactCallback<Ball, BottomWall> {
  @override
  void begin(Ball ball, BottomWall wall, Contact contact) {
    ball.lost();
  }
}