@readme:

your are right. aclculating nice looking values for the item's scaling dependent of current mouse position can be done with the Points2Vector node easily.

but:

1) i will have more than one mouse, because the project will be a largescaled installation with multiple human tracking. how to calculate the scaling then the best?

2) beside the item's scaling the x-translation must also be changed. for me it's more difficult to find the correct translations dependend of the actual calculated scalings (especially because of the item's centerX). is there a easy way?

thanks.

Yeah, that's what the mentioned LinearSpread is for. Manipulating its width will translate the icons evenly.

But I had another look at your example, and an even translation of the icons may not be the desired behaviour.
I'd try Attractor for manipulating the positions then, I think something similar could be achieved that way.
Or maybe a combination of both approaches at the same time?

Would be easier to try it, but no windows machine is close right now, sorry.
Good look though!