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kotlinlang

hey, so when I set a virtualWidth/virtualHeight (differently from the native width/height), it seems like
```playArea.hitTest(mouseXY)```
(playArea is a `roundRect`) no longer works correctly.
```playArea.hitTest(playArea.localMouseXY(views))```
also doesn't work. what's the incantation I'm missing?

alright, I figured it out.
1. View.hitTest says it requires local coords, but in fact requires global coords
2. `mouseXY`, aka `Stage.mouseXY`, return coords relative to the Stage (seems obvious now...)
3. `views.input.mouse` is undocumented but seems to return global coords.
4. `playArea.hitTest(views.input.mouse)` is the answer.

Yeah thats a bit misleading. We have to figure out a way to make it less confusing. If you have suggestions in that direction, let us know

I think checking that hitTest's documentation is correct, and having `mouseXY`'s and `views.input.mouse`'s documentation reference each other, that would be sufficient. (or renaming mouse to localMouse/globalMouse, but obviously we can't do that)

Well since we are working on korge 2.0 now and compatibility breaking is allowed, we can make those renames if makes more sense