for the path finding in my project I would like to set roads that NPC's will walk on, But the player can avoid. I Could block off ether side of the path I want them to take. But I think it might be easier if I can somehow invert the cells. to instead of marking a cell impassable if a "Wall" is in it. to mark a passable if a "path object" is in it.
anyone know a way? or will I just need to do the first thing?