Magic wall throw only Horizontal

[Salvus]

How to make this script to throw magic wall only horizontal?

local combat = Combat()
combat:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_ENERGY)
combat:setParameter(COMBAT_PARAM_CREATEITEM, ITEM_MAGICWALL)

local areacombate = {
    {1, 3, 1},
}

combat:setArea(createCombatArea(areacombate))

function onCastSpell(creature, variant, isHotkey)
    local actionId = 1050
    local target = getTileInfo(variant:getPosition()).actionid
    
    if target == actionId then
        creature:sendTextMessage(MESSAGE_EVENT_ADVANCE, "You can not use the magic wall on this tile")
        return false
    end
    return combat:execute(creature, variant)
end