data.raw["locomotive"]["locomotive"].burner.fuel_category = "chemical","rocket"

You need to use fuel_categories if you want more than one fuel. Also you need to delete fuel_category.


data.raw["locomotive"]["locomotive"].burner.fuel_category = nil
data.raw["locomotive"]["locomotive"].burner ...

Ok so... Gosh this is something. Im getting somewhere. I moved the declaracion of fuel categories to data-final-fixes.lua.
the code there:
data.raw["locomotive"]["locomotive"].burner.fuel_category = "chemical","rocket"

data.raw["furnace"]["stone-furnace"].energy_source.fuel_category = "chemical ...

Im trying to do a furnace that accepts only rocket fuel, but I cant wrap my head around how to define the fuel-category. I just need help with this, becouse Im really new to this and I dont really know if you can define specific fuel types.


Fuel items can only have one category. In vanilla ...

When I do this for a nuclear type furnace.

I've made this nuclear furnace, see https://mods.factorio.com/mod/NuclearFurnace

Nothing is hardcoded.

If your item has fuel type "nuclear", then it can be used in assemblers/furnaces/etc. with the same fuel type only .


Now I forgot to say that ...

Im trying to do a furnace that accepts only rocket fuel, but I cant wrap my head around how to define the fuel-category. I just need help with this, becouse Im really new to this and I dont really know if you can define specific fuel types.


data:extend({{type = "fuel-category", name ...

Thank you so much!

Edit: Sry for late response.

Im trying to do a furnace that accepts only rocket fuel, but I cant wrap my head around how to define the fuel-category. I just need help with this, becouse Im really new to this and I dont really know if you can define specific fuel types.