A* Pathfinder Trouble

Thank you for letting me join your forums. I have a question regarding an A* pathfinding script that I've been racking my brains for the last couple of days trying to figure out. I've worked out most of it, but my coding skills are not quite good enough to understand parts of it.

I get that it picks a start and end point when the program first loads or when a user clicks the mouse and it calls the findPath() function. and I can follow it to the calculatePath() function and can work out most...

A* Pathfinder Trouble

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