Map identification

There are 2 configuration fields that identifies a map in the game:

Name	Type	Description	Default
mapid	MainManager.Maps	The unique identifier of this map. Every map should have a different value set from the others	TestRoom (must be assigned to a unique value)
areaid	MainManager.Areas	The area this map belongs to. On Start, if this field is different than instance.areaid (the current area), UpdateArea is called	BugariaOutskirts (should be assigned to the logically accurate value)

mapid

The mapid is required to be set. While its default value is TestRoom, that value already has a map defined in the game meaning it's invalid to use this value except for the actual test room. It identifies the map specifically and can reliably be used to tell maps appart or to simply know the current map.

areaid

The areaid on the other hand is more complex. A map must belong to an area and just like the mapid, it is expected to always be set (defaults to BugariaOutskirts).

An area has the following properties:

• It takes a slot in librarystuff (more information on the areas page). This will be used in the Map window of the PauseMenu to reveal the location (each areas have a hardcoded location on the map)
• It can contain specific logic in AreaSpecific that always happen when initialising the map (it can also do more logic depending on mapid, but areas are also a way to group the logic to apply)
• The current area is stored in instance.areaid once the map is initialised which MapControl can use to detect an area change

UpdateArea

The area is responsible for grouping maps in such a way that going to a map with a different area than the current one involves some logic. Most of it happens in MainManager.UpdateArea:

• If exiting area 15 (Giant's Lair) and flag 596 is true (spoke to the Roach Elder in postgame), flag 597 is set to true (changed area after speaking to the Roach Elder in postgame)
• All regionalflag are reset
• instance.areaid is updated to the new area
• The librarystuff flag of the area is set to true

There are also many other places in the game where the area affects the logic. It's essentially a way to identify groups of maps that belong together logically.