Array Based Inventory system - GameCreators Forum

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GunnerWolf

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Joined: 21st Apr 2013

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Posted: 22nd Apr 2013 03:15

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Hi, I'm currently working on an inventory system for my RPG, it's a Text RPG, so not too much data is required, however, I was wondering, how (If at all possible) I could create an array of say, 100 items, and each item has a string and 5 integers assigned to it, so for example, if items(1) is a sword, it would be the following:

+ Code Snippet

DIM items(100)
items(1)[name$,hpmod,mpmod,atkmod,defmod,magmod]

I'm aware that may not be the correct code to do that, but it shows what I mean, so then a sword would be:
["Sword",0,0,2,0,0]
the 5 mod ints are added to their respective stats while the item is equipped, for example, if some cursed armour has:
["Cursed Armour",-10,0,0,5,0]
then wearing it would decrease your max hp by 10, but increase Defence by 5
The reason I want to use an array is because the only other way I can think of doing it would be with a function sort of like this:

+ Code Snippet

FUNCTION getitem(ID)
if ID = 1
   itemname$ = "Sword"
   hpmod = 0
   mpmod = 0
   atkmod = 2
   defmod = 0
   magmod = 0
endif
if ID = 2
   itemname$ = "Spear"
   hpmod = 0
   mpmod = 0
   atkmod = 1
   defmod = 1
   magmod = 0
endif

And adding an 8 line if statement for every single item.

Thanks in advance for any help.

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Phaelax

DBPro Master

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Joined: 16th Apr 2003

Location: Metropia

Posted: 22nd Apr 2013 22:29

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You'll want to create a User-Defined Type (UDT). And instead of allocating the array for 100 items, use dynamic lists. This will allow your array to grow and shrink to the number of items you currently have. Then you can make a function for adding new items to the array.

+ Code Snippet


type Item
    name as string
    hitpoints as integer
    magicpoints as integer
    attack as integer
    defend as integer
    magic as integer
endtype

dim items(0) as Item

setItem("Sword", 0, 0, 2, 0, 0)
setItem("Cursed Armor", -10, 0, 0, 5, 0)






function setItem(name$, hpmod, mpmod, atkmod, defmod, magmod)
    rem add a new element to the array
    array insert at bottom items()
    rem assign item properties to new element.
    rem When you use the array name without specifying an index, it'll
    rem use the last index that was created.
    items().name        = name$
    items().hitpoints   = hpmod
    items().magicpoints = mpmod
    items().attack      = atkmod
    items().defend      = defmod
    items().magic       = magmod
    rem But if you want, you can return the index that was added to the array
    i = array count(items())
endfunction i



function removeItem(itemId)
    array delete element items(), itemId
endfunction

"You're all wrong. You're all idiots." ~Fluffy Rabbit

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GunnerWolf

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Posted: 24th Apr 2013 04:42

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That looks really good, seems like a great way to handle it, thanks for the help, now I can continue with my game

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GunnerWolf

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Posted: 24th Apr 2013 19:11

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Is there any way to get an array index from one of the values? eg if Sword is one, is there any way to get the index of sword from the string "Sword"?

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Lucas Tiridath

AGK Developer

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Joined: 28th Sep 2008

Location: Kings Langley, UK

Posted: 24th Apr 2013 21:41

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Quote: "Is there any way to get an array index from one of the values?"

Only by searching for it like this.

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function getItemIndex(name$)
    for c = 0 to array count(items())
        if items(c).name = name$ then exitfunction c
    next c
endfunction -1

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