[Solved] Limiting Unit Production

[DeuceGorgon]

hello help me

How to make with requirements button for unit when i want train unit, and will only one and button will dissapear like hero in wc 3 in altar.

Help me how to make it...

 

[Dr Super Good]

The Mothership / Mothership Core the Melee Protoss use does this already... How about you take a look at that?

Basically requirement that show becomes false when more than 1 is queued or better at the player.