Array

[snowyowl]

Hi.

So I just started toying around with the Galaxy Editor, I was quite skilled with the World Editor in WC3. However, that was a long time ago so I've seem to have forgotten some things.

What I want to accomplish right now is to set up an array from 0-22 (23 slots in total), each one containing a specific unit (either to be selected on-screen or chosen from the "library") so that later on the game will pick a random number and give the corresponding unit to the player, disabling that number from being picked again for another player.

Any ideas?

 

[s3rius]

You make your array an array of type Unit Type, so it can hold all the different unit types.
Then you make a second array of the same size and of type Boolean. In this array you will save whether the corresponding unit type has been picked already. Let's call it UnitTypeIsPicked.

Local Variable:
    t = 0 <Integer>
Actions:
    //We set t to a random number at first. Then we set t to a different
    //random number as long as UnitTypeIsPicked[t] is true.
    //Once it's false we got a number that hasn't been taken yet.
    Set t = Random number between 0 and 22
    While (Condition) do (Action)
        Condition:
            UnitTypeIsPicked[t] == true
        Action:
             Set t = Random number between 0 and 22
    End While

    //Now we mark the number t as taken.
    Set UnitTypeIsPicked[t] = true;
    UnitType[t] is now your randomly selected unique unit.

Just remember: When this trigger ran 23 times and EVERY unit type is taken and you run this trigger again the while-loop will never stop because it doesn't find a free number anymore. So either make sure that you don't call it more than 23 times or add some sort of safety.

 

[snowyowl]

Thank you! That cleared some things up. However, I still can't understand how to set the units into the first array.
I've created an array of type "Unit Type of Unit" but I can't seem to be able to set the index to the corresponding units.

 

[Romek]

You don't need a boolean; you could move the data from the last index into the index that was just picked, and decrease the total by one. Then use a random integer from 0 to the new total, next time.

[0] Marine
[1] Zerg
[2] Zealot
[3] Reaper
Total = 4; Integer between 0 and 3.

If zerg gets picked:

[0] Marine
[1] Reaper << Set the last unit (Reaper) to the array slot that was picked.
[2] Zealot
Total = 3; Integer between 0 and 2

 

[s3rius]

Thank you! That cleared some things up. However, I still can't understand how to set the units into the first array.
I've created an array of type "Unit Type of Unit" but I can't seem to be able to set the index to the corresponding units.

You can't do it "inside" the array entry.

You need to make a trigger (by default you have a Map Init trigger which is great for that) to initialize the array properly.
You Add a couple of "Set Variable" actions to set each index of the array individually.