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What is the best way to set a rotation center of Container?


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With sprite it's possible to use anchor, but container only has pivot. So I wrote something like this. Is it a correct approach?

The only disadvantage is I need to update it after any bounds changes, is there any simple way to improve it?


var px = PIXI;
Object.defineProperty(px.Container.prototype, "pivotAnchor", {
	get: function() {
		var bounds = this.getLocalBounds();
		var x = 0;
		var y = 0;
		if(bounds.width > 0){
			x = this.pivot.x/bounds.width;
		if(bounds.height > 0){
			y = this.pivot.y/bounds.height;
		return new px.Point(x,y);
	set: function(v){
		var bounds = this.getLocalBounds();
		this.pivot.x = bounds.width*v.x;
		this.pivot.y = bounds.height*v.y;

container.pivotAnchor = new px.Point(0.5, 0.5);




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