Check for non uniform scale in a transform hierarchy.

nonUniformScaleCheck.js

// this will check whether t, or one of its ancestors,
// have non uniform scale.
function hasNonUniformAncestor(t:Transform){

	while(t){
	
		if(isNonUniformScale(t.localScale))return true;
		t = t.parent;
		
	} return false;
	
}

function isNonUniformScale(s:Vector3){
	
	if(s.x!=s.y)return true;
	if(s.x!=s.z)return true;
	if(s.y!=s.z)return true;
	return false;
	
}