Changes to GroupConfig in 3.16.1

Phaser 3
1

I am updating my game from phaser 3.15.1 to 3.16.1 and I am having some issues with groups as pools. I’m not completely understanding the api documentation on the changes to GroupConfig.

The classType config property now takes a GroupClassTypeConstructor, but when I look at the api documentation I’m not sure what this function should do. Before I just had the class of the object that the pool would instantiate.

When I look in the examples it is still using 3.15.1 and works the same my code worked before I went to 3.16.1.

Just wondering if anyone had some info on what should really go into the classType config parameter in 3.16.1.

Thank you.

1 Like
2

classType works the same before, it’s just the type description changed a bit. A class is a constructor, so you can pass your class. The default value is Phaser.GameObjects.Sprite.

Are you getting an error running your code?

3

I am. The class I have worked in 3.15.1. It inherits from a base class of mine that then inherits from Sprite. This one is a typescript one. A few others caused a web pack compile error. This may be because I didn’t implement the full constructor in my super classes. But typescript still complains. If I change the following to use as any, it compiles. I didn’t get a chance to actually try it yet.

   this.trashPool = this.add.group({
        maxSize: 20,
        defaultKey: 'ODImages',
        defaultFrame: 'trashcollection-000.png',
        classType: ODTrash as any,                            <-------    It compiles like this
        createCallback: (trash:ODTrash)=>{},
        removeCallback: (trash:ODTrash)=>{},
        runChildUpdate: false
    });

Argument of type ‘{ maxSize: number; defaultKey: string; defaultFrame: string; classType: typeof ODTrash; createCallback:
(trash: ODTrash) => void; removeCallback: (trash: ODTrash) => void; runChildUpdate: false; }’ is not assignable to parameter of type ‘GameObject[] | GroupConfig | GroupConfig[]’.
Type ‘{ maxSize: number; defaultKey: string; defaultFrame: string; classType: typeof ODTrash; createCallback: (trash: ODTrash) => void; removeCallback: (trash: ODTrash) => void; runChildUpdate: false; }’ is not assignable to type ‘GroupConfig’.
Types of property ‘classType’ are incompatible.
Type ‘typeof ODTrash’ is not assignable to type ‘GroupClassTypeConstructor’.
Type ‘typeof ODTrash’ provides no match for the signature ‘(scene: Scene, x: number, y: number, texture: string, frame?: string | number): void’.ts(2345)

4

Everything works if I change all of the classType to something as follows:

classType: ODTrashMarker as any

Webpack works and the game functions properly but I couldn’t get it to work without marking the class as any.

5

This is the important part. Your constructor must include (scene, x, y, texture, frame) because Phaser will call it with those arguments if the group creates a game object.

6

My constructors for all my custom classes have the constructor signature. Maybe it’s just the typescript def file, because if I mark it as any so everything works just like it did in 3.15.1. Now I upgraded to 3.16.2 and its still complains if I don’t mark it as any.

The constructors look correct to me and it all works when the game is running.

I also noticed that if I use the type Phaser.GameObjects.Sprite, which is supposed to be the default, it still complains, which is why it seems like a typescript def issue.