[Script] Altar that bestows a trait to items placed on it.

[GoldenShadowGS]

I wanted to place any ordinary item on the altar along with a single "water_gem" (made from a renamed blue_gem) This will transmute the item into one with the aquatic trait so it can work underwater. If you place the aquatic item back on the altar, you undo the transmutation and get your water gem back. I had to remove stackable items from the list of valid items since you can lose your water_gems if the entire stack isn't the same trait.

I found all of the variables necessary because if I altered the contents of the surface during the for loop, bad things happen. It is required to use a shutdown variable, "shutdownaltar" so the function can not be run in parallel.This was to prevent the spawned objects instantly removing themselves.

Code: Select all

shutdownaltar = false
function convertAquatic()
	if shutdownaltar == false then
		shutdownaltar = true
		local s = water_altar.surface
		local watergem = 0
		local killgem = false
		local aquatic = false
		local stackable = false
		local addgem = false
		local count = s:count()
		for n,e in s:contents() do
			if e.go.name == "water_gem" then
				watergem = watergem + 1
			end
			if e.go.item:hasTrait("aquatic") then
				aquatic = true
			end
			if e.go.item:getStackable() then
				stackable = true
			end
		end
		for n,e in s:contents() do
			if aquatic == true then
				if count == 1 then
					e.go.item:removeTrait("aquatic")
					local un = e.go.item:getUiName()
					local oldui = string.gsub(un, "Aquatic ", "")
					e.go.item:setUiName(oldui)
					addgem = true
					water_imbue_effect.controller:activate()
				end
			else
				if count == 2 then
					if watergem == 1 and stackable == false then
						e.go.item:addTrait("aquatic")
						local ui = e.go.item:getUiName()
						e.go.item:setUiName("Aquatic "..ui)
						water_imbue_effect.controller:activate()
						killgem = true
					end
				end
			end
		end
		if addgem == true then
			water_altar.surface:addItem(spawn("water_gem").item)
		end
		if killgem == true then
			for n,e in s:contents() do
				if e.go.name == "water_gem" then
					e.go:destroy()
				end
			end
		end							
		shutdownaltar = false
	end
end

[Drakkan]

really cool, this could be used for imbuing items in general thanks a lot for sharing !