High Limit and Zero

Hello Everyone,

I am new to Grasshopper so bear with me if this is silly question.

I am trying to limit the angle of rotation of boxes based on the distance from the boxes to a point. What I would like to set up is a system where if the rotation angle reaches a certain number (say 30) it will return a zero.

I've tried boolean operations but they only return a true or false. I've also tried Dispatch but it seems to reorganize index numbers. In other words, I need to keep all of the index numbers intact or in order.

If this makes sense, I would appreciate your help.

Thanks.