Math between RectTransform Position and Pivot

I'm currently using a RectScroll with a script for a moveable area which can be zoomed into. This script zooms into the correct place by changing the pivot point.

The issue comes when I now need to access the original Position X and Y of the Rect Transform (Which changes drastically when you set a new pivot point).

Does anyone know the math between the pivot and the Position, so I can extract a position value as if the pivot was originally at 0.5?

I.E: Position.y, at 400 on pivot 0.5 shows up as 73.45 when the pivot is at -46.28. Is there a way to use the latter two numbers to calculate back to the 400 value?

 

If we're only talking about the local values and no scaling (since you talk about zooming), the general formula is
baseOffset + (pivot * height) = finalPos

baseOffset is the position that your object has when pivot is 0. The pivot always adds to the position based on the height, because it indicates which percentage of the height you want to add to the object's position.

If you know either the height or the baseOffset, which you surely do, it'll be simple math and there will be one result. The height is usually shown in the inspector as well, at least when the anchors are centered.

You told us neither of both, but doing a quick calculation with the assumption that neither the base offset, the anchors, the height changes, the baseOffset should be ~ 396.5 and with a height close to 7.

 

Excellent, this works!

I did not mention scaling, however I found you get to the right position by simply dividing/multiplying with it.

Thanks for the help, this was exactly what I needed