Container issue with `updateTransform`

Hello, I don’t know if I’m doing things wrong or it’s a bug.

Basic information

• PixiJS version: 4.4.3

Description

When a class extends PIXI.Container, it’s possible to use the updateTransform hook. But if inside the constructor you modify a PIXI.Container property, it will stop the construction of the object and will call updateTransform.

Thing is, if you read, for example, the same property setted on the constructor, it will create an infinite loop.

Here is a live example: http://codepen.io/lgraziani/pen/aJjwNZ?editors=0011

This is the basic class example:

class BunnyContainer extends PIXI.Container {
  constructor() {
    super();
    
    // PIXI.Container prop
    this.width = 100;

    // It will never reach here
    this.bunny = PIXI.Sprite.fromImage('http://pixijs.github.io/examples/required/assets/basics/bunny.png');
    this.bunny.anchor.x = 0.5;
    this.bunny.anchor.x = 0.5;
    this.bunny.position.y = this.bunny.position.x = 50;
    
    
    this.addChild(this.bunny);
  }
  updateTransform() {
    const bunnyPosition = this.width * 0.1;
    
    // It will never reach here
    this.bunny.position.x = bunyPosition;
  }
}

If is there anything I can help just tell me 😃

Thank you!

[ivanpopelyshev]

spine uses updateTransform to animate some parts so its ok. just dont use “width” property, use some other name

[andrewstart]

Because updateTransform is intended to prepare the object for rendering, you probably don’t want to be reading or changing the display tree within it.