Allow backtracking from supply chains!

A supply chain can backtrack over another supply chain.

Example:
Axis Unit A is in supply in Skeleidima.
It can trace supply via Ghemines.
It can also trace supply via Msus/Antelat/Agedabia.

Axis Unit B in Mechili SW can trace a line to A in Skeleidima.
This line overlaps with the Skeleidima/Msus/Antelat line, and our
"don't backtrack" code would either prevent one of these lines from
forming.

Track the "visit depth" instead of a boolean, and increase the
depth every time we start a new supply line. Allow re-visits of a hex
unless it's been visited before during this depth, or unless it is the
head of a supply line.

0 files changed, 0 insertions, 0 deletions