Weird Minor error.

06-05-2009, 02:47 AM

JASS:

private function SwapItemPosition takes backpack d, unit target,integer c returns nothing
    local item i = UnitItemInSlot(target,c)
    local integer id = GetItemTypeId(i)
    call RemoveItem(i)
    if d.ItemType[c] != 0 then
    call UnitAddItemById(target,d.ItemType[c])
    endif
    set d.ItemType[c] = id
    set d.UserData[c] = GetItemUserData(i)
    set d.Charges[c] = GetItemCharges(i)
    set i = null
endfunction

private function SwapSlot takes nothing returns nothing
    local integer oid = GetIssuedOrderId()
    local unit u = GetTriggerUnit()
    local backpack d = backpack[u]
    if d == 0 then
        set d = backpack.create(u)
    endif
    if oid == SLOT0 then
        call SwapItemPosition(d,u,0)
    elseif oid == SLOT1 then
         call SwapItemPosition(d,u,1)
    elseif oid == SLOT2 then
         call SwapItemPosition(d,u,2) 
    elseif oid == SLOT3 then
         call SwapItemPosition(d,u,3)
    elseif oid == SLOT4 then
         call SwapItemPosition(d,u,4)
    elseif oid == SLOT5 then
         call SwapItemPosition(d,u,5)
    endif
    set backpack[u] = d
    set u = null
endfunction

It seems that whenever the first time the unit swaps the item to his "backpack" it does nothing but for the 2nd cast onwards it works well.

06-06-2009, 04:38 AM

fX_

it seems the backpack doesnt actually hold items; rather, it is just a record of them that has some interface with which a player can interact (swap items)?

well if by "the first time" you mean "the first time you operated on that interface (above)" and if by "it does nothing" you mean "the unti doesnt receive any item from the backpack" thats because the backpack doesnt 'contain' (describe) any items, initially. (d.ItemType[c] == 0)