How can GH find the maximum incircles in an irregular area?

[w.wu]

Here I got the idea of “shift” from the post of

Shift Path Logic Please!

I sense that its very similar to Flip Matrix It has nothing to do with flip matrix. Is shifts the path level in a direction by collapsing common path branches together. Flip matrix flips paths from columns to rows with item counts. See here an image how shift path works: [Capture]