Trying to create a custom class array

Question

I'm kinda new to Unity and Javascript and working on a simple roguelike game. I'm trying to create an array of a custom "Weapon" class but getting error messages. The code goes like this:

 class Weapon {
     var name : String;
     var minDamage : int;
     var maxDamage : int;
     var textureOffset : Vector2;
 };
 
 var weaponList : Weapon[];
 
 function Start () {
     initWeaponList();
 }
 
 function initWeaponList () {
 
     weaponList[0].name = "Branch";
     weaponList[0].minDamage = 1;
     weaponList[0].maxDamage = 1;
     weaponList[0].textureOffset = Vector2(0,0);
     
     weaponList[1].name = "Short Sword";
     weaponList[1].minDamage = 1;
     weaponList[1].maxDamage = 2;
     weaponList[1].textureOffset = Vector2(0.125,0);
 }

What's wrong with this code? I've checked around on this board and in the Unity script references, and tried a couple other ways to do this, but nothing seems to work. Help would be appreciated!

Answer 1

Answer by MarkFinn · Feb 16, 2013 at 02:04 PM

You need to initialise the array. As it stands, you have the name of an array, with no array attached.

 function initWeaponList () {
     weaponList=new Weapon[2];
     weaponList[0]=new Weapon();
     weaponList[0].name = "Branch";
     weaponList[0].minDamage = 1;
     weaponList[0].maxDamage = 1;
     weaponList[0].textureOffset = Vector2(0,0);
      
     weaponList[1]=new Weapon();
     weaponList[1].name = "Short Sword";
     weaponList[1].minDamage = 1;
     weaponList[1].maxDamage = 2;
     weaponList[1].textureOffset = Vector2(0.125,0);</PRE>
 }

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frost914 · Feb 16, 2013 at 04:21 PM 0

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Thank you very much! This explains a lot since I've always omitted this vital step.

sacredgeometry · Feb 16, 2013 at 06:39 PM 0

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wouldn't the scope of that array be limited to the function this way? I assume he/she wants access to the array outside of the function as its a list of the weapons i am guessing the protagonist or npcs is/are carrying.

Eric5h5 · Feb 16, 2013 at 06:50 PM 1

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@sacredgeometry: no, the variable is declared outside the function so it's global.

sacredgeometry · Feb 16, 2013 at 07:21 PM 0

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Are there mutable lists in js? if so why cant you initialise non specific sized list in the declaration?

Eric5h5 · Feb 16, 2013 at 08:50 PM 1

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Everything in Unity is built on .NET/$$anonymous$$ono, so the language isn't relevant as far as what methods/collections are supported. If you don't need the size of the array to be dynamic then it's better to use standard arrays since they are faster than List.

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Trying to create a custom class array

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