• this summons vfx while some player have certain item in their inventory
• the placed pos depends on mwscripts holding

local types = require('openmw.types')
local core = require('openmw.core')
local util = require('openmw.util')
local self = require('openmw.self')
local nearby = require('openmw.nearby')

local holding = "6th bell hammer"
local vfx_name = "scatter"
local run

local function players(hold) 
    local acts = nearby.players
    for a, b in pairs(acts) do
        if types.Actor.inventory(acts[a]):countOf(hold) > 0 then
          return true
        else
          return false
        end
    end 
end

local function onUpdate()

       local effe = core.magic.EFFECT_TYPE.FireDamage
       local static = core.magic.effects.records[effe].hitStatic
       local pos = self.position
       
         if players(holding) == true and self.controls.movement > 0 then
            core.sendGlobalEvent('SpawnVfx', {
			            model = types.Static.record(static).model, 
			            position = pos + util.vector3(0,0,-20), 
			            options = { vfxId = vfx_name }})
         else
            core.sendGlobalEvent('RemoveVfx', vfx_name)
         end
end

return { engineHandlers = { onUpdate = onUpdate} }