[TUTORIAL] Using Custom Stat as a crafting ingredient

[DrunkProtos]

I am writing this post, because how frustrating it was to figure this out, and how easy it was actually to do. These code snippets were basically made by Wonderlarr, I just edited them for ease of use. This tutorial assumes you have already made a working component for your custom stat.

modmain.lua:

GLOBAL.CHARACTER_INGREDIENT["CUSTOM"] = "custom"
local _IsCharacterIngredient = GLOBAL.IsCharacterIngredient

GLOBAL.IsCharacterIngredient = function(ingredienttype)
	if ingredienttype and ingredienttype == "custom" then
		return true
	else
		return _IsCharacterIngredient(ingredienttype)
	end
end

AddClassPostConstruct("components/builder_replica", function(self)
    local _HasCharacterIngredient = self.HasCharacterIngredient

    self.HasCharacterIngredient = function(self, ingredient)
        if self.inst.components.builder ~= nil then
            return self.inst.components.builder:HasCharacterIngredient(ingredient)
        elseif ingredient.type == CHARACTER_INGREDIENT.CUSTOM then
            local custom = self.inst.replica.custom
            if custom ~= nil then

                local current = custom:GetCurrent() -- make sure this is a function that returns the current value of your custom stat
                return current >= ingredient.amount, current
            end
        end

        return _HasCharacterIngredient(self, ingredient)
    end
end)

AddClassPostConstruct("components/builder", function(self)
    -- RemoveIngredients
    local _RemoveIngredients = self.RemoveIngredients

    self.RemoveIngredients = function(self, ingredients, recname)
        local recipe = GLOBAL.AllRecipes[recname]
        if recipe then
            for k,v in pairs(recipe.character_ingredients) do
                if v.type == CHARACTER_INGREDIENT.CUSTOM then
                    self.inst.components.custom:DoDelta(-v.amount)
                end
            end
        end
        return _RemoveIngredients(self, ingredients, recname)
    end

    -- HasCharacterIngredient
    local _HasCharacterIngredient = self.HasCharacterIngredient

    self.HasCharacterIngredient = function(self, ingredient)
        if ingredient.type == CHARACTER_INGREDIENT.custom and self.inst.components.custom ~= nil then
            local current = self.inst.components.custom.current -- make sure this is an existing property of your stat that holds the current value
            return current >= ingredient.amount, current
        end

        return _HasCharacterIngredient(self, ingredient)
    end
end)

So you basically change every "custom" with the name of your custom stat, and it should work.

Edited June 1, 2025 by DrunkProtos