Curious... why do you need to know when the scale changes?
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh
So i can rescale the distance between a model camera's target and it's position on the fly, according to the current UI scale.
It's for my PlantsVsGhouls project i'll release a video later this night with the new features since i need some alpha testers for different screen resouliton and ui scale tests.