Handling moving of a list of units

[M4573R]

So I have an ability that creates a unit at the position of the target. This unit's position needs to be updated every increment of time to the position of the target so that it follows it. Its basically a buff that is a unit.

First problem is, I want to be able to have 10 max buffs. So when you create an 11th one, the first one should get deleted.

Second problem is, how do I handle each buff storing the unit it is suppose to follow so I can update it every time interval? I was thinking using a couple arrays (one for buffs, another for units to follow in matching order) , but then when units die, the buffs need to be deleted, so there's holes in the array, and new buffs need to fills these holes..... blah blah awful. I was looking into some kind of data attachment using JASS, but I've never touched JASS before. Only thing I can think of is some kind of elaborate homemade GUI vector, but I think that's probably a bad idea.

 

[Pharaoh_]

For your first question, i think buff detection is way easier in Jass. Because you can remove specific buffs, not any type of buff. You can only remove all the buffs by GUI i think if that 11th is applied. I don't know if this works, try it:

Set buff[1] = buff[11]

Second question, when the units die, the buff also "dies", so i don't get your problem.

 

[M4573R]

Well what tried to say is that I'm not using actual wc3 buffs. I'm using a dummy unit being positioned over a unit every time interval. This is so I can make the buff invisible to the enemy.

 

[Pharaoh_]

How exactly then the main unit will be affected by the other unit's buff? Remember they are seperate. In order for the other unit to be affected as well, you will need to make it based off an AoE passive, which will also affect other units and will be visible to enemies.

 

[M4573R]

Let me try to be clear. There is no WC3 buff. The unit doesn't not have a little image at the bottom of the screen. I said that when I say "buff" i mean the dummy unit. Think of Naix's ulti in dota if you know it. It creates a little dummy unit above the creep that follows him around and the enemy can't see it. Its art for a "buff".

As much as this is confusing, it doesn't even matter. My original question is how to handle moving a list of units along with another list of units.

Example: You cast dummy spell on a unit. A dummy unit with some model is placed AT the target unit. This dummy unit must now follow around the target. It will look like a "buff".
Now you cast it again on someone else. Another dummy unit is created on the target and it must follow that target around.

I want it so you can have a maximum of 10 of these "buffs" following people around.