Comments (6)
It works now! Happy to go on flutter game. :) @luanpotter @feroult
from flame.
Could you please provide your code relevant to the error? I can only guess that you created a world (Box2DComponent) and added inside Components that are not bodies (BodyComponent). All components added directly inside a Box2DComponent must be BodyComponents.
from flame.
Here is my test code:
class GameRoot extends Game{
GameRoot(){
this._gameWorld = GameWorld();
this._gameWorld.initializeWorld();
this._initAssets().then((_) => this._isLoaded = true);
}
GameWorld _gameWorld;
bool _isLoaded = false;
Size _dimensions;
Future<Null> _initAssets() async{
this._dimensions = await Flame.util.initialDimensions();
await Flame.audio.load('supersoyboy.ogg');
await Flame.audio.load('dryfire.mp3');
Flame.audio.loop('supersoyboy.ogg');
}
@override
void render(Canvas canvas) {
this._gameWorld.render(canvas);
}
@override
void update(double t){
this._gameWorld.update(t);
}
@override
void resize(Size size){
this._gameWorld.resize(size);
}
}
And another file:
class GameWorld extends Box2DComponent{
GameWorld():super();
SuperBoyComponent player;
@override
void initializeWorld() {
//this.add(BackgroundComponent(this.viewport));
//this.add(GroundComponent(this));
this.player = SuperBoyComponent(this);
this.add(this.player);
}
@override
void update(double t) {
try{
super.update(t); //This line triggers the error!
}catch(e){
print("Error:------------------$e");
}
this.cameraFollow(this.player, horizontal: 0.5);
}
}
class SuperBoyComponent extends BodyComponent{
static final double playerHeight = 48.0;
static final double playerWidth = 40.0;
SuperBoyComponent(Box2DComponent box) : super(box){
this._loadImages().then((_) => this._isLoading = false);
this._createBody();
}
bool _isLoading = true;
final images = Map<String, Image>();
bool _isIdle = true;
bool _isRun = false;
bool _isJump = false;
bool _isSlide = false;
@override
void update(double t) {
this._isIdle = this.body.linearVelocity.x == 0.0;
this._isRun = this.body.linearVelocity.x != 0.0;
this._isJump = this.body.getContactList() == null;
}
@override
void renderPolygon(Canvas canvas, List<Offset> points){
if(this._isLoading){
return;
}
Image image = this._isJump ? this.images["jump_1"] : (this._isIdle ? this.images["run_1"] : (this._isRun ? this.images["run_1"] : this.images["slide_1"]));
final rect = Rect.fromLTWH(- SuperBoyComponent.playerWidth * 0.5, - SuperBoyComponent.playerHeight * 0.5, SuperBoyComponent.playerWidth, SuperBoyComponent.playerHeight);
paintImage(canvas: canvas, image: image, rect: rect, fit: BoxFit.contain, flipHorizontally: this.body.linearVelocity.x < 0.0);
}
Future<Null> _loadImages() async{
/// run_1 run_15
/// jump_1 jump 15
/// slide_1
Image image;
for(int i = 1; i <= 15; i ++){
image = await Flame.images.load("run_$i.png");
this.images["run_$i"] = image;
image = await Flame.images.load("jump_$i.png");
this.images["jump_$i"] = image;
}
image = await Flame.images.load("slide_1.png");
this.images["slide_1"] = image;
}
void _createBody(){
final shape = PolygonShape()
..setAsBoxXY(SuperBoyComponent.playerWidth, SuperBoyComponent.playerHeight);
shape.centroid.x = SuperBoyComponent.playerWidth * 0.5;
shape.centroid.y = SuperBoyComponent.playerHeight * 0.5;
final fixtureDef = FixtureDef()
..shape = shape
..restitution = 0.0
..density = 0.05
..friction = 0.2;
final bodyDef = BodyDef()
..linearVelocity = Vector2.zero()
..position = Vector2(0.0, 15.0)
..bullet = true
..type = BodyType.DYNAMIC;
this.body = this.world.createBody(bodyDef)
..createFixtureFromFixtureDef(fixtureDef)
..setFixedRotation(true);
}
}
Thanks very much for help!
from flame.
Hi @spkingr, thanks for your code.
I was able reproduce the problem and I'm trying to fix it.
from flame.
It was a bug in Box2D Dart port. Since the original maintainer was not merging this PR from Feb, we decided to fork the project and create our own package.
You'll need to change any references to box2d
package or sub-packages to add the _flame
suffix:
import 'package:box2d_flame/box2d.dart';
Just wait @luanpotter to release next Flame version and you should be ok with your code.
Best
from flame.
@spkingr the new version was released (0.9.1). Could you verify if the problem is solved? Thanks!
from flame.
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from flame.