After searching the forge api page for a while, I figured out how to use variants in smelting recipes.

Simply put this in registry handler class and the load in your main class!

 

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GameRegistry.addSmelting(new ItemStack(BlockInit.YOUR_ORE ,1 ,YOUR_VARIANT_NUMBER), new ItemStack(ItemInit.YOUR_ITEM), 1.0f);

 

Example).

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            COPPER(0, "steel"),
            TIN(1, "nord");

 

These are my two different variants in my EnumHandler, so whenever you make the smelting recipe it would look something like this for your respective variants.

 

For Copper it would look like, 

In RegistryHandler.classs

 

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public static void otherRegistries(){
        GameRegistry.registerWorldGenerator(new WorldGenCustomOres(), 0);

        //For copper it would look like

        GameRegistry.addSmelting(new ItemStack(BlockInit.ORE_OVERWORLD ,1 ,0), new ItemStack(ItemInit.INGOT_COPPER), 1.0f);

        //and for Tin it would look like

        GameRegistry.addSmelting(new ItemStack(BlockInit.ORE_OVERWORLD ,1 ,1), new ItemStack(ItemInit.INGOT_TIN), 1.0f);

    }

 

Lastly pop it in your Init like this 

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@Instance
    public static Main insatnce;
    
    
    @SidedProxy(clientSide = Reference.CLIENT, serverSide = Reference.COMMON)
    public static CommonProxy proxy;
    
    @EventHandler
    public static void preInit(FMLPreInitializationEvent event) {RegistryHandler.otherRegistries();}
    FMLInitializationEvent
    @EventHandler
    public static void init(FMLInitializationEvent event) {RegistryHandler.otherRegistries();}
    
    @EventHandler
    public static void postInit(FMLPostInitializationEvent event) {}
    
}

 

And voila! You ores should be smelting correctly!

Edited December 1, 20177 yr by landocchi
typo

2 reasons not to use this 1 ^ and 2 1.13 there will be no more metadata/subItems

3 hours ago, loordgek said:

2 reasons not to use this 1 ^ and 2 1.13 there will be no more metadata/subItems

Well, I'm sure there will. Block metadata still exists, its just under the abstraction of IBlockStates.

But in terms of us-as-modders not having to deal with it all the time, sure.

https://minecraft.gamepedia.com/1.13/Flattening

5 hours ago, diesieben07 said:

I am very disappointed that this is not called The Flattening.

Same.

Also, I see redstone ore (repeaters, lamps, etc) is turning into "one block with two states" finally.