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Lib39

by exaptations · for Minecraft

Useful mixins, events, and utilities originating in Yttr.

33KDownloads
53d agoLast updated
MITLicense
Fabric · QuiltLoaders

About Lib39

From Modrinth

Useful mixins, events, and utilities originating in Yttr.

Lib39 is a loose collection of utilities, mixins, events, etc originating in our content mod Yttr — people constantly talk about "stealing" mixins from Yttr since it has so many random useful things in it, so we decided it'd be a good thing to split it up into a library.

39 is the atomic number of Yttrium. You can pronounce it as "lib thirty nine", "lib three nine", "lib miku", whatever you want.

Getting Started

Lib39 is distributed on the Sleeping Town Maven. Merge the following with your build.gradle:

repositories {
	maven {
    	url 'https://repo.sleeping.town'
        content {
        	includeGroup 'com.unascribed'
        }
    }
}

dependencies {
	modApi include("com.unascribed:lib39-core:2.0.7+1.20.1")
	// put any other modules you want here
	// loom won't JiJ transitive deps, so you need to include all of them
}

Lib39 is also distributed on Modrinth, but you are strongly encouraged to JiJ the modules. They're small.

Exact module sizes when JIJ'd if you care

<!-- zipinfo -l lib39--all.jar |grep 'META-INF/jars/lib39-' |awk '{ print ($6 / 1024) "/" $10 }' |cut -d/ -f1,4 |tr / - |cut -d- -f1,3 |sort -n |sed -E 's/^([0-9]+\.[0-9][0-9])[0-9]-(.)(.*)$/| \U\2\L\3\E | \1KiB |/' |sed 's/Aqi/AQI/' |wl-copy -->

| Module | Size | | ----------- | ---------- | | Lockpick | 4.38KiB | | AQI | 5.20KiB | | Util | 5.58KiB | | Ripple | 6.06KiB | | Sandman | 6.56KiB | | Deferral | 6.57KiB | | Crowbar | 6.83KiB | | Dessicant | 9.23KiB | | Wrangle | 9.62KiB | | Recoil | 9.79KiB | | Phantom | 12.10KiB | | Mesh | 13.99KiB | | Weld | 16.69KiB | | Waypoint | 22.33KiB | | Core | 26.12KiB | | Tunnel | 27.85KiB | | Machination | 33.06KiB | | Keygen | 34.88KiB | | Total | 257KiB |

Replace core with whatever the module (or modules) you want is/are.

Lib39 1.4 and earlier only support 1.19-1.19.2. Lib39 1.5 adds 1.18.2 and 1.19.3 support, and a series of "experimental" builds provide 1.20.1 support. Lib39 2.0 is API-compatible with 1.x and is presently only available for 1.20.1, and is developed in tandem with Yttr.

Modules

Random utility classes such as AutoRegistry, AutoMixin, and shared classes with the other modules. Also contains random small tidbits, such as crafting sounds.

Mixins to allow removing artificial limits, such as model rotation angles, crafting recipe sizes, and more. Various other related utilities as well, such as the ability to inherit elements from parent models.

Allows customizing splash texts.

Adds a convenient networking system based on Concrete Network from 1.12.

Adds the ability to "phase" blocks out of the world temporarily. The blocks are never removed from the world, simply hidden.

Adds an additional baked world layer with additive blending for rendering various kinds of glowy effects.

Adds a "big blocks" system for creating "prefab" blocks like vanilla beds, but way nicer and with theoretically no size limit.

Adds the ability to make items "always tick", leveraging random ticks.

Adds events for low-level world generation phases, such as constructing surface rules, and raw access to chunks during the surface and population phases for invoking custom generators.

Adds the ability to load music in XM, S3M, and MOD format via IBXM2.

Implements "logical defaults" for loot tables, and automatically manages recipe unlocks based on a "discovered_by" key in recipe JSONs. Blockstates and block/item models soon.

Adds new recipe types, such as a "soaking" recipe for throwing items in a fluid and a "smashing" recipe for crushing a block between two others with a piston. Comes with EMI support.

Events to let you mess with the camera and FOV, and a way to suppress vanilla behavior and catch raw attack/use. Everything you need to make a satisfying gun mod, basically.

  • Util

Random utility classes. No docs yet.

  • AQI

Fixes vanilla particle rendering behind translucent blocks on Fancy/Fast graphics by rendering in two passes, like pre-1.14.

  • Mesh

Adds an efficient graph-based block network system, for pipes and the like. No docs yet.

  • Wrangle

Adds a "control hints" system. No docs yet.

Former modules

Adds a "subgroup" system for splitting up creative tabs even further. Now maintained by DaFuqs as a standalone library.

Future modules

Yttr has a lot of weird mixins and utilities in it, and I'd be here a while were I to factor them all out at once. Here's some things I want to separate out but haven't gotten around to yet:

  • Equivalence

Adds a "substitutes" system, for making items functionally the same as others in recipe ingredients and tags.

  • Conflagration

Adds a CSS-based configuration system and a framework for making GUIs that interact with it.

Highlights

From source data

Game versions

Supports 5 Minecraft versions, the newest being 1.20.1.

Loaders

Runs on Fabric and Quilt.

Footprint

Rated a light load on a server.

What kind of mod it is

From the catalog
Listed on Modrinth as “Mods”

Quality of life & UI

Small conveniences, tweaks and interface improvements players notice straight away.

Runs on your server

From source side support

Modrinth lists Lib39 as required on the server. Check its Modrinth page to see whether players need it too.

Compatibility

Game
Minecraft
Loaders
FabricQuilt
Runs on
Serverrequired on the server
Game versions
1.20.1 and 4 earlier

Verified at the source

  • ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
  • ✓Authorexaptations, as published on Modrinth
  • ✓LicenseMITFree

Lib39, answered

Generated from the mod’s own source data.

Do my players need to install Lib39?

Modrinth lists Lib39 as required on the server. Check its Modrinth page to see whether players need it too.

Which loaders does it support?

Fabric and Quilt.

Is it free?

Yes. Lib39 is free to download from Modrinth. Its license is MIT.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Lib39 on a Minecraft server.

Deploy in about a minute from $4.20 a month, then add Lib39 in one click.