How to spawn unit from demon portal

[Cpt.FLux]

So I want to create a Demon Portal that spawns all sort of unit and attack the player, but still had a limit on how much and how often they spawn. Work like in the blood elf campaign Gates of the Abyss

 

[MasterBlaster]

Wasn't it done with a simple, periodic unit spawn trigger?

If I were you, I would try this and see how it works in practice. Just remember to clear up leaks.

 

[Pyrogasm]

You can also open that map and look at the triggers. That will be the easiest way to learn.

 

[Dr Super Good]

As long as one periodically clears a unit group or removes units from it on their death, you can track all the units spawned using that single unit group.

To spawn a variety of units randomly one can use either an if then else decision tree or an array fed system that takes weights and unit types and quantities. Both would roll a single random number per spawning.

If the unit group contains less than the maximum number of spawned units then spawn more units and add them to the unit group. This is done periodically.

Either give the units to an AI player and let the AI order them around to attack players, or periodically order all units in the unit group to attack a point near an enemy player.