SC2Mapster

How would I make a unit which would peridocally spawn units. But only have up to 3 alive at a time.

I.e have 3 units spawned, and one dies, it will spawn another one, and stop spawning until another one dies.

I was thinking of a hangar ability, but I can't figure out how to release the units and still count them - or if it's even possible.

I think a requirement could work, use Less Than -> Count Unit (spawned unit) Queued or Better at Unit -> Constant 3. This is how the Carrier limits its production.

Use a Spawn type behavior. See the spawning of larva by the Hatchery/Lair/Hive for an example.

There are campaign abilities like that. For example the new LOTV campaign has an ability to have 2 zealots come, and I think Kerrigan had something similar in HOTS. You could experiment with dependencies in another map since removing dependencies is a pain.

You could also just make a spawn unit ability and have it give a stackable behavior to the source unit that would be removed when the spawned unit dies, just set the max stack to 3. I would probably actually just do it this way, much simpler. You would also make a validator to check how many behaviors are active.

Quote from fishy77: Go

There are campaign abilities like that. For example the new LOTV campaign has an ability to have 2 zealots come, and I think Kerrigan had something similar in HOTS. You could experiment with dependencies in another map since removing dependencies is a pain.

You could also just make a spawn unit ability and have it give a stackable behavior to the source unit that would be removed when the spawned unit dies, just set the max stack to 3. I would probably actually just do it this way, much simpler. You would also make a validator to check how many behaviors are active.

Will probably do this :) Thanks :)