mirror of https://github.com/flutter/pinball.git
Alejandro Santiago
4 years ago
committed by
GitHub
commit
d41012e6c3
|
After Width: | Height: | Size: 9.5 MiB |
@ -0,0 +1,169 @@
|
||||
import 'dart:async';
|
||||
import 'dart:math' as math;
|
||||
|
||||
import 'package:flame/components.dart';
|
||||
import 'package:flame_forge2d/flame_forge2d.dart' hide Timer;
|
||||
import 'package:flutter/material.dart';
|
||||
import 'package:pinball/game/game.dart';
|
||||
import 'package:pinball_components/pinball_components.dart';
|
||||
|
||||
/// {@template chrome_dino}
|
||||
/// Dinosaur that gobbles up a [Ball], swivel his head around, and shoots it
|
||||
/// back out.
|
||||
/// {@endtemplate}
|
||||
class ChromeDino extends BodyComponent with InitialPosition {
|
||||
/// {@macro chrome_dino}
|
||||
ChromeDino() {
|
||||
// TODO(alestiago): Remove once sprites are defined.
|
||||
paint = Paint()..color = Colors.blue;
|
||||
}
|
||||
|
||||
/// The size of the dinosaur mouth.
|
||||
static final size = Vector2(5, 2.5);
|
||||
|
||||
/// Anchors the [ChromeDino] to the [RevoluteJoint] that controls its arc
|
||||
/// motion.
|
||||
Future<_ChromeDinoJoint> _anchorToJoint() async {
|
||||
final anchor = _ChromeDinoAnchor(chromeDino: this);
|
||||
await add(anchor);
|
||||
|
||||
final jointDef = _ChromeDinoAnchorRevoluteJointDef(
|
||||
chromeDino: this,
|
||||
anchor: anchor,
|
||||
);
|
||||
final joint = _ChromeDinoJoint(jointDef);
|
||||
world.createJoint2(joint);
|
||||
|
||||
return joint;
|
||||
}
|
||||
|
||||
@override
|
||||
Future<void> onLoad() async {
|
||||
await super.onLoad();
|
||||
final joint = await _anchorToJoint();
|
||||
await add(
|
||||
TimerComponent(
|
||||
period: 1,
|
||||
onTick: joint.swivel,
|
||||
repeat: true,
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
List<FixtureDef> _createFixtureDefs() {
|
||||
final fixtureDefs = <FixtureDef>[];
|
||||
|
||||
// TODO(alestiago): Subject to change when sprites are added.
|
||||
final box = PolygonShape()..setAsBoxXY(size.x / 2, size.y / 2);
|
||||
final fixtureDef = FixtureDef(box)
|
||||
..shape = box
|
||||
..density = 999
|
||||
..friction = 0.3
|
||||
..restitution = 0.1
|
||||
..isSensor = true;
|
||||
fixtureDefs.add(fixtureDef);
|
||||
|
||||
// FIXME(alestiago): Investigate why adding these fixtures is considered as
|
||||
// an invalid contact type.
|
||||
// final upperEdge = EdgeShape()
|
||||
// ..set(
|
||||
// Vector2(-size.x / 2, -size.y / 2),
|
||||
// Vector2(size.x / 2, -size.y / 2),
|
||||
// );
|
||||
// final upperEdgeDef = FixtureDef(upperEdge)..density = 0.5;
|
||||
// fixtureDefs.add(upperEdgeDef);
|
||||
|
||||
// final lowerEdge = EdgeShape()
|
||||
// ..set(
|
||||
// Vector2(-size.x / 2, size.y / 2),
|
||||
// Vector2(size.x / 2, size.y / 2),
|
||||
// );
|
||||
// final lowerEdgeDef = FixtureDef(lowerEdge)..density = 0.5;
|
||||
// fixtureDefs.add(lowerEdgeDef);
|
||||
|
||||
// final rightEdge = EdgeShape()
|
||||
// ..set(
|
||||
// Vector2(size.x / 2, -size.y / 2),
|
||||
// Vector2(size.x / 2, size.y / 2),
|
||||
// );
|
||||
// final rightEdgeDef = FixtureDef(rightEdge)..density = 0.5;
|
||||
// fixtureDefs.add(rightEdgeDef);
|
||||
|
||||
return fixtureDefs;
|
||||
}
|
||||
|
||||
@override
|
||||
Body createBody() {
|
||||
final bodyDef = BodyDef()
|
||||
..gravityScale = 0
|
||||
..position = initialPosition
|
||||
..type = BodyType.dynamic;
|
||||
|
||||
final body = world.createBody(bodyDef);
|
||||
_createFixtureDefs().forEach(body.createFixture);
|
||||
|
||||
return body;
|
||||
}
|
||||
}
|
||||
|
||||
/// {@template flipper_anchor}
|
||||
/// [JointAnchor] positioned at the end of a [ChromeDino].
|
||||
/// {@endtemplate}
|
||||
class _ChromeDinoAnchor extends JointAnchor {
|
||||
/// {@macro flipper_anchor}
|
||||
_ChromeDinoAnchor({
|
||||
required ChromeDino chromeDino,
|
||||
}) {
|
||||
initialPosition = Vector2(
|
||||
chromeDino.body.position.x + ChromeDino.size.x / 2,
|
||||
chromeDino.body.position.y,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
/// {@template chrome_dino_anchor_revolute_joint_def}
|
||||
/// Hinges a [ChromeDino] to a [_ChromeDinoAnchor].
|
||||
/// {@endtemplate}
|
||||
class _ChromeDinoAnchorRevoluteJointDef extends RevoluteJointDef {
|
||||
/// {@macro chrome_dino_anchor_revolute_joint_def}
|
||||
_ChromeDinoAnchorRevoluteJointDef({
|
||||
required ChromeDino chromeDino,
|
||||
required _ChromeDinoAnchor anchor,
|
||||
}) {
|
||||
initialize(
|
||||
chromeDino.body,
|
||||
anchor.body,
|
||||
anchor.body.position,
|
||||
);
|
||||
enableLimit = true;
|
||||
// TODO(alestiago): Apply design angle value.
|
||||
const angle = math.pi / 3.5;
|
||||
lowerAngle = -angle / 2;
|
||||
upperAngle = angle / 2;
|
||||
|
||||
enableMotor = true;
|
||||
// TODO(alestiago): Tune this values.
|
||||
maxMotorTorque = motorSpeed = chromeDino.body.mass * 30;
|
||||
}
|
||||
}
|
||||
|
||||
class _ChromeDinoJoint extends RevoluteJoint {
|
||||
_ChromeDinoJoint(_ChromeDinoAnchorRevoluteJointDef def) : super(def);
|
||||
|
||||
/// Sweeps the [ChromeDino] up and down repeatedly.
|
||||
void swivel() {
|
||||
setMotorSpeed(-motorSpeed);
|
||||
}
|
||||
}
|
||||
|
||||
extension on World {
|
||||
// TODO(alestiago): Remove once Forge2D supports custom joints.
|
||||
void createJoint2(Joint joint) {
|
||||
assert(!isLocked, '');
|
||||
|
||||
joints.add(joint);
|
||||
|
||||
joint.bodyA.joints.add(joint);
|
||||
joint.bodyB.joints.add(joint);
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,23 @@
|
||||
import 'package:flame_forge2d/flame_forge2d.dart';
|
||||
import 'package:flame_test/flame_test.dart';
|
||||
import 'package:flutter_test/flutter_test.dart';
|
||||
import 'package:pinball/game/game.dart';
|
||||
|
||||
void main() {
|
||||
TestWidgetsFlutterBinding.ensureInitialized();
|
||||
final flameTester = FlameTester(Forge2DGame.new);
|
||||
|
||||
group('ChromeDino', () {
|
||||
flameTester.test(
|
||||
'loads correctly',
|
||||
(game) async {
|
||||
final chromeDino = ChromeDino();
|
||||
|
||||
await game.ready();
|
||||
await game.ensureAdd(chromeDino);
|
||||
|
||||
expect(game.contains(chromeDino), isTrue);
|
||||
},
|
||||
);
|
||||
});
|
||||
}
|
||||
Loading…
Reference in new issue