How to unlock unit from policy

[Core Xii]

I want to make a unit available only through a policy, and couldn't find any way to achieve this. Units can't seem to have policy prerequisites, and policies can't grant you specific techs to fake it. Anyone know how to achieve this? Also for buildings, as well.

 

[whoward69]

You have to use Lua

Specifically the GameEvents

GameEvents.CityCanTrain(iPlayer, iCity, iUnitType)
GameEvents.CityCanConstruct(iPlayer, iCity, iBuildingType)

along with

Players[iPlayer]:HasPolicy(iPolicy)

 

[Pazyryk]

See tutorial: Adding xml tags that work through Lua (eg, policy-dependent units & buildings)

 

[Core Xii]

Excellent, thank you.