Make 1 out of X item always drop

[leeebux]

Is there a way to always force a item to drop from a boss?

 

[endziu2222]

How about increasing chance?

 

[Niebieski]

Is there a way to always force a item to drop from a boss?

If we are talking about TFS 1.5 then I would go this way:

onDropLoot event

ec.onDropLoot = function(self, corpse)
    if configManager.getNumber(configKeys.RATE_LOOT) == 0 then
        return
    end

    local player = Player(corpse:getCorpseOwner())
    local mType = self:getType()
    local doCreateLoot = false

    local specialItemIDs = {2195, 2488}
    if not player or player:getStamina() > 840 then
        doCreateLoot = true
    end

    if doCreateLoot then
        local monsterLoot = mType:getLoot()
        local specialItems = {}
        for i = 1, #monsterLoot do
            if table.contains(specialItemIDs, monsterLoot[i].itemId) then
                table.insert(specialItems, loot)
            else
                local item = corpse:createLootItem(monsterLoot[i], false)
                if not item then
                    print("[Warning] DropLoot: Could not add loot item to corpse.")
                end
            end
        end
        if #specialItems > 0 then
            local selectedSpecial = specialItems[math.random(#specialItems)]
            corpse:createLootItem(selectedSpecial, true)
        end
    end

    if player then
        local text
        if doCreateLoot then
            text = ("Loot of %s: %s."):format(mType:getNameDescription(), corpse:getContentDescription())
        else
            text = ("Loot of %s: nothing (due to low stamina)."):format(mType:getNameDescription())
        end
        local party = player:getParty()
        if party then
            party:broadcastPartyLoot(text)
        else
            player:sendTextMessage(MESSAGE_LOOT, text)
        end
    end
end

createLootItem function

function Container.createLootItem(self, item, specialItem)
    if self:getEmptySlots() == 0 then
        return true
    end

    local itemCount = 0
    local randvalue = getLootRandom()
    local itemType = ItemType(item.itemId)

    if specialItem then
        if itemType:isStackable() then
                itemCount = randvalue % item.maxCount + 1
        else
                itemCount = 1
        end
    else
        if randvalue < item.chance then
            if itemType:isStackable() then
                itemCount = randvalue % item.maxCount + 1
            else
                itemCount = 1
            end
        end
    end

    while itemCount > 0 do
        local count = math.min(ITEM_STACK_SIZE, itemCount)

        local subType = count
        if itemType:isFluidContainer() then
            subType = math.max(0, item.subType)
        end

        local tmpItem = Game.createItem(item.itemId, subType)
        if not tmpItem then
            return false
        end

        if tmpItem:isContainer() then
            for i = 1, #item.childLoot do
                if not tmpItem:createLootItem(item.childLoot[i]) then
                    tmpItem:remove()
                    return false
                end
            end

            if #item.childLoot > 0 and tmpItem:getSize() == 0 then
                tmpItem:remove()
                return true
            end
        end

        if item.subType ~= -1 then
            tmpItem:setAttribute(ITEM_ATTRIBUTE_CHARGES, item.subType)
        end

        if item.actionId ~= -1 then
            tmpItem:setActionId(item.actionId)
        end

        if item.text and item.text ~= "" then
            tmpItem:setText(item.text)
        end

        local ret = self:addItemEx(tmpItem)
        if ret ~= RETURNVALUE_NOERROR then
            tmpItem:remove()
        end

        itemCount = itemCount - count
    end
    return true
end

You can add any item id you wish to be 'special' into this table specialItemIDs.
Remember that a monster need to have that item in his loot list.

 

[leeebux]

Thanks alot!

 

[Fjorda]

Either that or go down the route like Canary did, add a "unique" attribute to any of your loot items, and then add the relevant code to deserialize (in items.cpp). Then when looping through loot, you can check for a unique attribute, and give it once (via highest score from damage map, or however else you like it)