Bleh, I was talking about Coordinates System.
What are the 3 different "grid" systems? I know "Find the XY Values of the Unit Location," "Preplace units and give amount then center location," and a "Center location, spawn units, remove, then center location again."
I agree we should name these "grid" systems better
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You also have my "coordinate" system where you can center a location at any X,Y part of the map without using units.