Sort 2 different geometry based on one parameter

Dear All


I hope that someone can help me.

I've the following problem, I've 2 different geometry (2 layer on rhino one upon the other that represent the perimeter of level 0 and level 1 of a house) made up a number of poly as you can see in

001

I've sort the poly based on x and y distance from 0,0

002 - 003

now the same steps for the second group of poly (I've moved on z the poly just to understand)

004 - 005

if we draw a line from the centroid of the breps this is the result

006 - 007


Here the problem


I would like to change for example the perimeter of the level one (poly3) without a new sort of these poly,

006 - 007

just to explain me, I would have the same order for the 2 different layer based on level 0 or I would like to sort the 2 geometry based on an external reference number of points or so on.


Any suggestion?

I hope I made myself clear (sorry for English)


Andrea