For clarity's sake, I'm adding a random number to an Array that has to be within the set of indices that exist in the Array "border_proximities_checked". This should always do exactly that, and nothing else.
#randi_range(int from, int to) generating ints outside of that range somehow
somber matrix
randi_range is an inclusive range, so the -1 is there to prevent generating one greater than the greatest index available in "border_proximities_checked". Tell how I have messed this up. I can't see it.
Some prints I get when testing this:
Those aren't errors, just my test prints. It does send errors, but those don't give the full picture. They just say it's out of bounds.
Look how "out of bounds" some of them are, somehow.