Find the relative position of a famo.us Surface -

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is there way current position of famo.us surface?

i mean, after render tree has done thing , modifiers have been multiplied, surface exists somewhere on screen. can't figure out how ask where. seems simple enough question.

specifically, i'm building kind of scroll view , need test if contained surface has moved outside of bounding box.

it looks surface has _matrix property use, seems crude way of doing it.

what missing?


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