mirror of https://github.com/flutter/pinball.git
Allison Ryan
4 years ago
committed by
GitHub
commit
69373ebb78
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import 'package:flame/components.dart';
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import 'package:pinball/game/game.dart';
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/// {@template bottom_group}
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/// Grouping of the board's bottom [Component]s.
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///
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/// The bottom [Component]s are the [Flipper]s and the [Baseboard]s.
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/// {@endtemplate}
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// TODO(alestiago): Consider renaming once entire Board is defined.
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class BottomGroup extends Component {
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/// {@macro bottom_group}
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BottomGroup({
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required this.position,
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required this.spacing,
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});
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/// The amount of space between the line of symmetry.
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final double spacing;
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/// The position of this [BottomGroup].
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final Vector2 position;
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@override
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Future<void> onLoad() async {
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final spacing = this.spacing + Flipper.width / 2;
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final rightSide = _BottomGroupSide(
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side: BoardSide.right,
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position: position + Vector2(spacing, 0),
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);
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final leftSide = _BottomGroupSide(
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side: BoardSide.left,
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position: position + Vector2(-spacing, 0),
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);
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await addAll([rightSide, leftSide]);
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}
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}
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/// {@template bottom_group_side}
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/// Group with one side of [BottomGroup]'s symmetric [Component]s.
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///
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/// For example, [Flipper]s are symmetric components.
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/// {@endtemplate}
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class _BottomGroupSide extends Component {
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/// {@macro bottom_group_side}
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_BottomGroupSide({
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required BoardSide side,
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required Vector2 position,
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}) : _side = side,
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_position = position;
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final BoardSide _side;
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final Vector2 _position;
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@override
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Future<void> onLoad() async {
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final direction = _side.direction;
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final flipper = Flipper.fromSide(
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side: _side,
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)..initialPosition = _position;
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final baseboard = Baseboard(side: _side)
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..initialPosition = _position +
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Vector2(
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(Flipper.width * direction) - direction,
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Flipper.height,
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);
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final slingShot = SlingShot(
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side: _side,
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)..initialPosition = _position +
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Vector2(
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(Flipper.width) * direction,
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Flipper.height + SlingShot.size.y,
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);
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await addAll([flipper, baseboard, slingShot]);
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}
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}
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@ -0,0 +1,34 @@
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import 'package:flame_forge2d/flame_forge2d.dart';
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/// Forces a given [BodyComponent] to position their [body] to an
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/// [initialPosition].
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///
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/// Note: If the [initialPosition] is set after the [BodyComponent] has been
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/// loaded it will have no effect; defaulting to [Vector2.zero].
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mixin InitialPosition<T extends Forge2DGame> on BodyComponent<T> {
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final Vector2 _initialPosition = Vector2.zero();
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set initialPosition(Vector2 value) {
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assert(
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!isLoaded,
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'Cannot set initialPosition after component has already loaded.',
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);
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if (value == initialPosition) return;
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_initialPosition.setFrom(value);
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}
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/// The initial position of the [body].
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Vector2 get initialPosition => _initialPosition;
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@override
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Future<void> onLoad() async {
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await super.onLoad();
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// TODO(alestiago): Investiagate why body.position.setFrom(initialPosition)
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// works for some components and not others.
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assert(
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body.position == initialPosition,
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'Body position does not match initialPosition.',
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);
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}
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}
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@ -0,0 +1,80 @@
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// ignore_for_file: cascade_invocations
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import 'package:flame_forge2d/flame_forge2d.dart';
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import 'package:flame_test/flame_test.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:pinball/game/game.dart';
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import '../../helpers/helpers.dart';
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void main() {
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TestWidgetsFlutterBinding.ensureInitialized();
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final flameTester = FlameTester(Forge2DGame.new);
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group('BottomGroup', () {
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flameTester.test(
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'loads correctly',
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(game) async {
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final bottomGroup = BottomGroup(position: Vector2.zero(), spacing: 0);
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await game.ready();
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await game.ensureAdd(bottomGroup);
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expect(game.contains(bottomGroup), isTrue);
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},
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);
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group('children', () {
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flameTester.test(
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'has one left flipper',
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(game) async {
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final bottomGroup = BottomGroup(position: Vector2.zero(), spacing: 0);
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await game.ready();
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await game.ensureAdd(bottomGroup);
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final leftFlippers = bottomGroup.findNestedChildren<Flipper>(
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condition: (flipper) => flipper.side.isLeft,
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);
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expect(leftFlippers.length, equals(1));
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},
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);
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flameTester.test(
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'has one right flipper',
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(game) async {
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final bottomGroup = BottomGroup(position: Vector2.zero(), spacing: 0);
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await game.ready();
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await game.ensureAdd(bottomGroup);
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final rightFlippers = bottomGroup.findNestedChildren<Flipper>(
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condition: (flipper) => flipper.side.isRight,
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);
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expect(rightFlippers.length, equals(1));
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},
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);
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flameTester.test(
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'has two Baseboards',
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(game) async {
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final bottomGroup = BottomGroup(position: Vector2.zero(), spacing: 0);
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await game.ready();
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await game.ensureAdd(bottomGroup);
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final baseboards = bottomGroup.findNestedChildren<Baseboard>();
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expect(baseboards.length, equals(2));
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},
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);
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flameTester.test(
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'has two SlingShots',
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(game) async {
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final bottomGroup = BottomGroup(position: Vector2.zero(), spacing: 0);
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await game.ready();
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await game.ensureAdd(bottomGroup);
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final slingShots = bottomGroup.findNestedChildren<SlingShot>();
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expect(slingShots.length, equals(2));
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},
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);
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});
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});
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}
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@ -0,0 +1,81 @@
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// ignore_for_file: cascade_invocations
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import 'package:flame_forge2d/flame_forge2d.dart';
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import 'package:flame_test/flame_test.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:pinball/game/game.dart';
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class TestBodyComponent extends BodyComponent with InitialPosition {
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@override
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Body createBody() {
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return world.createBody(BodyDef());
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}
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}
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class TestPositionedBodyComponent extends BodyComponent with InitialPosition {
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@override
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Body createBody() {
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return world.createBody(BodyDef()..position = initialPosition);
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}
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}
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void main() {
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final flameTester = FlameTester(Forge2DGame.new);
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group('InitialPosition', () {
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test('correctly sets and gets', () {
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final component = TestBodyComponent()..initialPosition = Vector2(1, 2);
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expect(component.initialPosition, Vector2(1, 2));
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});
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flameTester.test(
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'throws AssertionError '
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'when BodyDef is not positioned with initialPosition',
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(game) async {
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final component = TestBodyComponent()
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..initialPosition = Vector2.all(
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10,
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);
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await expectLater(
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() => game.ensureAdd(component),
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throwsAssertionError,
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);
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},
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);
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flameTester.test(
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'positions correctly',
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(game) async {
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final position = Vector2.all(10);
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final component = TestPositionedBodyComponent()
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..initialPosition = position;
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await game.ensureAdd(component);
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expect(component.body.position, equals(position));
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},
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);
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flameTester.test(
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'deafaults to zero '
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'when no initialPosition is given',
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(game) async {
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final component = TestBodyComponent();
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await game.ensureAdd(component);
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expect(component.body.position, equals(Vector2.zero()));
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},
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);
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flameTester.test(
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'setting throws AssertionError '
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'when component has loaded',
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(game) async {
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final component = TestBodyComponent();
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await game.ensureAdd(component);
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expect(component.isLoaded, isTrue);
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expect(
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() => component.initialPosition = Vector2.all(4),
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throwsAssertionError,
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);
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},
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);
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});
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}
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