Putting a limit to a unit

[Darkshine]

Greetings. I would like some help with a trigger (or another way, if exists) that limits the number of certain unit that can be on the map.

Think like the same limit for the Mines from Goblin Techies in DoTA (there is possible have only 15 mines in the entire map, at same time). When you put a 16th mine, the older mine will be destroyed. This is exactly what i want to do.

Thanks

 

[Zorchimonde]

The carrion beetles ability has a limit for summoned units. Perhaps you could tailor something out of that?
Feral Spirit also gets rid of the old wolves when new ones get summoned IIRC, but that would only work to cycle whatever comes out in a single cast of your ability.
Are we even talking a summoning spell here?

 

[Darkshine]

Yeah, i will use this 'limit system' in a skill that put 'mini towers' over the map, but with a limit of only ONE at lvl 1. However, at lvl 2, you can put up to two towers at same time (however, a third tower will causes the older tower to be instantly destroyed)

However i didn't think about this skills. But, carrion beetles need corpses to be created right? There is a method to create the beetles (towers) without need the corpses?

 

[Zorchimonde]

However i didn't think about this skills. But, carrion beetles need corpses to be created right? There is a method to create the beetles (towers) without need the corpses?

Try changing "targets allowed" from "Dead" to something else. Never really messed around with beetles myself, just a thought.

If this limit is unique to the map, or at most, per player, a few variable arrays might do the trick, but I'm a little too tired to write down details right now.

As a final idea, you might be able to fake it by making your tower units trainable/buildable by whoever has the ability to lay them, make it look like it's just another ability, and from there, capping training/construction should be simple enough...I think.

 

[Dr Super Good]

Use a queue like system.

If overflows, kill front of queue. If one dies, remove it from queue.

 

[Darkshine]

Queue system ahn? I think it is what i need...
... But how exactly i can do it? Talk more about it, please. xD


Oh, about the Carrion Beetle skill, i tried using it but the skill checks the nearest target (that can be a corpse, tree, etc) and create a beetle. My custom skill must have a target, so the player can put the turret where he want

 

[Dr Super Good]

Well in the case of an array queue. You allocate some array space to a unit for the spell representing the queue. When you add to the queue, you add to the next index which you then make wrap around if it exceedes the allocated array size (so if allocated array size was 10 and it stores in element 9, next is element 0). If number of elements is the same size as the array size, then you have queued up to capacity so remove the head of the queue and replace it with a new end element.

If a unit in the queue dies, you can then loop through the queue from the head backwards, and move foward all elements past the removed element. Not efficient but does not really need to be.

 

[Bribe]

"This is exactly what i want to do."

>> If you haven't actually started on it, post your queries in the World Editor Help Zone. Triggers & Scripts is for debugging an already existing trigger. I've moved your thread to the World Editor Help Zone for you.