Unit filters can be divided up into two parts: `baseUnitFilter`s and `mapUnitFilter`s.
The former is tested against the unit as it appears in the json.
This means it doesn't have an owning civ or tile it stands on, just its base properties.
The latter is tested against the unit as it appears on the map, including its nation, tile, health and all other properties.
The following are allowed to be used:
- unit name
- unit type - e.g. Melee, Ranged, WaterSubmarine, etc.
-`Land`, `Water`, `Air`
-`land units`, `water units`, `air units`
-`non-air` for non-air non-missile units
-`Military`, `military units`
-`Civilian`, `civilian units`
-`All`
-`Melee`
-`Ranged`
-`Nuclear Weapon`
-`Great Person`, `Great`
-`Embarked`
- Any exact unique the unit has
- Any exact unique the unit type has
- Any combination of the above (will match only if all match). The format is `{filter1} {filter2}` and can match any number of filters. For example: `[{Military} {Water}]` units, `[{non-air} {Armor}]` units, etc. No space or other text is allowed between the `[` and the first `{`.
A filter determining a part of the population of a city. It can be any of the following values:
-`Population`
-`Specialists`
-`Unemployed`
-`Followers of the Majority Religion` or `Followers of this Religion`, both of which only apply when this religion is the majority religion in that city
## regionType
Used for dividing the world into regions in each of which a single player is placed at the start of the game.
Allowed values are `Hybrid` and the name of any terrain that has one of the following two uniques:
-`A Region is formed with at least [amount]% [simpleTerrain] tiles, with priority [amount]`
-`A Region is formed with at least [amount]% [simpleTerrain] tiles and [simpleTerrain] tiles, with priority [amount]`
## simpleTerrain
Used by NaturalWonderGenerator to place natural wonders
Allowed values are:
-`Land`
-`Water`
-`Elevated`
- The name of any terrain
## stats
This indicates a text comprised of specific stats and is slightly more complex.
Each stats is comprised of several stat changes, each in the form of `+{amount} {stat}`, where 'stat' is one of the seven major stats mentioned above.
For example: `+1 Science`.
These can be strung together with ", " between them, for example: `+2 Production, +3 Food`.
-`Natural Wonder` (as opposed to above which means testing for a specific Natural Wonder by name, this tests for any of them)
Please note all of these are _case-sensitive_.
Also note: Resource filters depend on whether a viewing civ is known in the context where the filter runs. Water and specific tests require a viewing civ, and if the resource needs a tech to be visible, that tech to be researched by the viewing civ. The other resource category tests can succeed without a known viewing civ only for resources not requiring any tech. So - test your mod!
So for instance, the unique "[stats] from [tileFilter] tiles [cityFilter]" can match several cases:
Used to indicate for what use the terrain should be viewed when dividing the world into regions, in each of which a single player is placed at the start of the game.
Allowed values are:
- improvement name (Note that "Road" and "Railroad" _do_ work as improvementFilters, but not as tileFilters at the moment.)
