I'm using a particle emitter but it seems the same as group sorting, let me know if I'm wrong on that. I see how to sort a group by x or y but I'm trying to sort by scale like this: getLargest: function(emitr) { emitr.sort('scale.x', Phaser.Group.SORT_ASCENDING) return emitr.getTop(); }I'm not sure what right is but that is wrong, it throws an error in Phaser.js "Cannot read property 'z' of undefined" Thanks for any help!