Expansive Spell with lifeleech and manaleech

[Sarah Wesker]

data/scripts/exevo_test.lua

local lifeLeechAmount = 50
local manaLeechAmount = 50
local creaturesCount = 0 -- It is only used to calculate the number of creatures that were affected, leave it at 0

local healthEvent = CreatureEvent("leechHealth")

function healthEvent.onHealthChange(creature, attacker, primaryDamage, primaryType, secondaryDamage, secondaryType, origin)
    creature:unregisterEvent("leechHealth")
    if primaryType == COMBAT_HEALING then
        return primaryDamage, primaryType, secondaryDamage, secondaryType
    end

    if attacker and attacker:isPlayer() then
        local hpLeechAmount = math.floor((primaryDamage * (lifeLeechAmount / 100)) / creaturesCount)
        if hpLeechAmount > 0 then
            attacker:addHealth(hpLeechAmount)
            attacker:sendTextMessage(MESSAGE_HEALED, string.format("You leech %d health.", hpLeechAmount))
        end

        local mpLeechAmount = math.floor((primaryDamage * (manaLeechAmount / 100)) / creaturesCount)
        if mpLeechAmount > 0 then
            attacker:addMana(mpLeechAmount)
            attacker:sendTextMessage(MESSAGE_HEALED, string.format("You leech %d mana.", mpLeechAmount))
        end
    end
    return primaryDamage, primaryType, secondaryDamage, secondaryType
end

healthEvent:register()

local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)
combat:setArea(createCombatArea(AREA_CIRCLE5X5))

function onGetFormulaValues(player, level, magicLevel)
    local min = (level / 5) + (magicLevel * 8) + 50
    local max = (level / 5) + (magicLevel * 12) + 75
    return -min, -max
end

combat:setCallback(CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValues")

function onTargetTile(caster, position)
    local tile = Tile(position)
    if not tile then
        return
    end

    local creatureCount = tile:getCreatureCount()
    if creatureCount == 0 then
        return
    end

    for _, creature in pairs(tile:getCreatures()) do
        if creature ~= caster then
            creature:registerEvent("leechHealth")
            creaturesCount = creaturesCount + 1
        end
    end
end

combat:setCallback(CALLBACK_PARAM_TARGETTILE, "onTargetTile")

local spell = Spell(SPELL_INSTANT)

function spell.onCastSpell(creature, variant, isHotkey)
    if combat:execute(creature, variant) then
        creaturesCount = 0
        return true
    end
    return false
end

spell:name("Hells")
spell:words("exevo test2")
spell:group("attack")
spell:vocation("sorcerer", "master sorcerer")
spell:id(24)
spell:cooldown(1000)
spell:groupCooldown(1000)
spell:mana(100)
spell:isPremium(true)
spell:register()

 

[VitoxMaster]

Thanks for scripts! I've used it as a base and added the part which will unregister an event after 20 seconds.
The question is: don't you need to pass hpLeechAmount / manaLeechAmount in if condition (or in display function) wrapped in math.abs? Isn't it negative number since it's damage? (health reduction in other words).

Best regards, Vitox.

 

[jmeconnection]

How to transform this script to run in TFS 0.4?