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HammerLib

Mod

by Zeith

Library used by all of DragonForge team's mods.

Type

Mod

CurseForge Downloads

58,324,431

CurseForge ID

247401

Modrinth Downloads

884,982

Modrinth ID

PlkSuVtM

Last Updated

Nov 7, 2026

Description

full_247401_downloads.svg247401_all.svg

Utility mod that contains really useful code for quite a few mods.

This library provides:

  • Simple, annotation-based content registration.
    • For Blocks, HammerLib automagically registers BlockItem(s). If you want to disable BlockItem(s), let your block implement INoItemBlock, ICustomBlockItem, or ICreativeTabBlock, depending on what you want to achieve.
    • For BlockEntity rendering, custom BlockEntityType constants may have additional @TileRenderer, pointing to an IBESR<Tile> class.
  • Old-styled language parsers in format of "key=value", instead of JSONs (the file names and format is like in older game versions, but you need to call LanguageAdapter.registerMod(MOD_ID); inside your mod's constructor for it to register.
  • Mod Source checks, that allow you to check if the mod was downloaded from adware/malware sites, AND warn users about it.
  • Java-based recipe registration with a simple RegisterRecipesEvent, that runs on HammerLib.EVENT_BUS, allowing you, as a developer, to register crafting recipes like before, with code.
  • Java-based tag population, with BuildTagsEvent, that runs on HammerLib.EVENT_BUS.
  • Vastly simplified networking, using Network class, and IPacket + INBTPacket to allow for flawless and intuitive packet code development.
  • Wrappers for block harvesting, that has been moved over to tags - BlockHarvestAdapter
  • Field-based NBT serialization, so that you don't make a typo/forget to write serialization/deserialization code.
  • Good old TileEntity wrappers, with TileSyncable and TileSyncableTickable, that allow synchronization of initial state, as well as registering properties that will be synchronized independently.
  • ContainerAPI for BlockEntities, allowing to avoid MenuType<?> altogether (no need to register screen providers, menu types etc)
  • ItemStack -> Color[] API, with TexturePixelGetter.getAllColors
  • Annotation-based custom model loaders (@LoadUnbakedGeometry on IUnbakedGeometry<SELF>), avoids using the geometry loader class by making a common wrapper.
  • ...And a whole lot more!

And a lot of rich features for mod devs.

Not enough? You can just view sources on  GitHub, it's free!

Permissions:

  • You can use this mod in your modpack.
  • Yes, you are allowed to build a mod that requires and depends on HammerLib, but not embeds it!
  • You are not allowed to repost this mod to other sites without providing a CurseForge/Modrinth download link and my permission (zeitheron.png Zeitheron on Discord)
  • You are not allowed to include this (or any other mods of DragonForge team) in your own mod. Building addons, however, is allowed, but a friendly PM would be good.

Note:

  • The only supported version of minecraft is the latest one that this mod exists for. DO NOT ASK TO DOWNGRADE!

dev.png

Join the discord server and follow Zeitheron on twitter.icoTwitter!

If you would like to support my work, you can become a patron via  Patreon. 

Compatibility

Mod Loaders

Client Neoforge Server

Game Versions

1.21 1.21.1

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

Mini PC for self-hosting

Mini PC for Self-Hosting

A low-power box that can sit in a cupboard and run a modded server around the clock.

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As an Amazon Associate I earn from qualifying purchases.

Screenshots

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Included in Modpacks (578)

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External Resources

CurseForge Modrinth Source Code Wiki Issues