Zone tier: Difference between revisions

{{tocright}}{{Missing info|How is zone tier handled for unique locations, such as the Tomb of the Eaters?}}

* The [[World Map]] tier of the current [[parasang]].

== Calculating a Zone's Tier ==

To determine a zone's tier:{{Code Reference|namespace=XRL.World|class=ZoneManager|method=GetZoneTier}}

# Find the world map tier of the current parasang. These numeric tier values are pictured in the [[#Base_Difficulty_Tier_of_World_Map_Parasangs|Base Difficulty Tier of World Map Parasangs]] section below. If the tier is 0, increase it to 1 (1 is the minimum zone tier).

# Next, modify that value based on the current depth:

#* Otherwise, the zone tier is increased by '''Floor(Depth / 5)'''. Depth 5-9 increases the zone tier by 1, depth 10-14 increases the zone tier by 2, and so on.

#** As an example, if the player digs beneath a {{favilink|Jungle}} biome (world map tier 3), the zone tier at depth 17 will be '''6'''.

# Finally, modify the result to ensure it is a number between 1 and 8. If a calculation would result in a zone tier value lower than 1 or higher than 8, the result is always constrained to the nearest number within the 1 to 8 range.

For example, in an area with a zone tier of 5, tier 5 creatures (such as {{favilink|dynamic turret tinker|plural}}) and tier 5 items (such as {{favilink|fullerite gauntlets}}) are more likely to be found. Note that zone tier is only one of several factors that affects the dynamic generation of creatures and objects in the world. Specific [[:Category:Biomes|biomes]], unique [[:Category:Locations|locations]] (such as [[historic site]]s or [[:Category:Dungeons|dungeons]]), or other factors can influence the objects and items that are generated in particular zones. This is why, for example, the surface levels of the {{favilink|Desert Canyons}} will always contain the same primary creatures, such as {{favilink|snapjaw scavenger|snapjaws}}, {{favilink|equimax|equimaxes}}, and {{favilink|giant dragonfly|giant dragonflies}} - this biome has its own unique population/encounter tables.

Most biomes have unique generation tables defined for their surface and levels 1-5 underground.<ref>Determined by review of <code>Worlds.xml</code>, <code>ZoneTemplates.xml</code>, and <code>PopulationTables.xml</code>.</ref> Once you descend to level 6 or lower in most areas, creature and item generation typically starts to be more directly correlated to zone tier, creature tier, and item tier, and is less strictly defined by biome-specific spawning logic.

Item tier is manually specified for each item in the game's <code>ObjectBlueprints.xml</code>. You can view the tier of a particular item on its wiki page.

== Base Difficulty Tier of World Map Parasangs ==

Each parasang of the world map has a base difficulty tier associated with, as shown on the following numeric overlay:

<div style="overflow:auto;">

[[File:Joppaworld with tiers2.png|frame|left|class=scalable|alt=An image of the world map, with each tier's number found laid on top of the respective terrain.|The world map with base difficulty tiers of each parasang.]]

</div>

These tiers can be found looking in the <code>Text.txt</code> file located in the base game directory, in the section of the file titled "ZoneTier_JoppaWorld".

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