I am working on an Item which is similar to a potion and have run into a few issues. First, how would I transition between two different colors continuously? Second, How do I register my custom IItemColor?

I'm not aware of any way to transition between colours for an item.

IItemColor

only receives the

ItemStack

and the tint index defined in the model, you don't have access to any timing information like the total world time. You could store the total world time in the stack's NBT from

Item#onUpdate

, but that would only work for items in the player's inventory.

 

Use

Minecraft#getItemColors

to get the

ItemColors

instance, then call

ItemColors#registerItemColorHandler

to register your

IItemColor

.

...you don't have access to any timing information like the total world time...

 

Minecraft.getMinecraft().theWorld.getWorldTime()

?

...you don't have access to any timing information like the total world time...

 

Minecraft.getMinecraft().theWorld.getWorldTime()

?

 

Ah, I forgot that you can always access the

World

on the client side. That would probably work.