hello everybody.
this time I'm trying to plan ideas for a new code.
I'm going to post two simple drawing to try to explain my thoughts.

In the first drawing I have a 3x3(for example) grid on a plan (space 2) and the first problem to solve is to write a code to allow me to move back and forward from grid 3x3 to grid nxn (and keeping the position of the original points and get the positions of the new generated points); in practice in the first object (as example) I have 9 points and each one has his own (x,y); the second object has in:
the previous 9 points without alterations plus the (x,y) of the new points.

now pass this part i'd like to go from (space 2) to (space n) so next one in line would be a cube and so on. (please see the drawing).

next step (second drawing) let's suppose we fix n=2 (space 2); from (space 2) i'd like to create a third object where all the points presents in (space 2) "migrate" in a different position.(please see second drawing).

last step for this code would be the possibility to generate in same way the geodesics of the space image.

anyway, if someone (interested of course) have same ideas how I could approach the structure of this code would be a great help.
when I said approach I mean ideas like " if i was in you I use this or that" or "maybe a matrix of matrix with this structure or that structure as a element" or again "I have no idea but a cup of tea with a slice of cake at 5 pm may help you in another way".

so all ideas are welcome.
thank you all again.
follow the two drawing.
PS: sorry I have problem uploading the drawing; hope is clear enough what i try to achieve.

I'd break it down to steps.

Store and validate a matrix. You're not describing a grid, you're describing nxn matrices. Design one or more methods to parse data, store, print, and diagnose nxm matrices of any size. Make all that as flexible and generic as you need, test the functions rigorously, and then proceed to a next step.

Copy matrix A to martrix B. Write utilities to copy from one matrix to another. Determine fault situations, such as what is impossible, or cases where data is to be lost. Also determine which rules you need to be flexible, such as what information to populate extra locations when you copy a smaller matrix into a larger one, or whether you will be dynamically allocating space for new matrices.

Stuff like that.

thank you very much for your help.
is a good start.
I'll see what I can do and I might leave this thread open while I'm proceeding whit this toy.