Changing geometry (switching data box) automatically

I have 2 geometries, e.g. one is in rectangular form and the other one is in a square form. They are defined in 2 separate definitions. For simulation purpose, I wish to find a feature that can switch them automatically. Currently, I am using Colibri Iterator (figure below) to change the quantitative numbers automatically. Is there a way to switch from one data / mesh / polysurface box to another automatically? Thanks


Automatically based on what? you change something else and the shape will change
and it’s better if you post your definition