Formation Arrays
by Lucent
Formation Arrays gives NeoForge 1.21.1 a shared API for building and managing custom formations in Minecraft, with a separate EasyGui dependency.
What it does
A formation is a group of blocks or entities that can be created, managed and linked through the mod's API. Formations can communicate with each other, and the mod provides capabilities that other mods can attach to them, such as access tokens for custom team behaviour, formation plates and formation power sources.
Datapack support lets pack makers define their own formations and custom connection types. Ports on formations can automatically cast connection types, so compatible values pass between linked parts without extra code. The mod is built for other developers as well as players, and it is meant to be used through its dedicated API.
Formation Arrays requires EasyGui. Every player and the server need a copy of the mod. Files are published for NeoForge only, for 1.21.1, with 0.0.1 as the latest file, released 2026-01-20 under All rights reserved. The source code is public, but the mod is not open source.
Key features
Formation management API
A dedicated API creates, tracks and removes formations from other mods or datapacks.
Formation communication
Formations exchange data with one another, so linked structures can respond to changes in their neighbours.
Access tokens
Access token capabilities let other mods define custom behaviour for teams that control a formation.
Formation plates and power sources
Built-in capabilities for formation plates and formation power sources give mod authors ready-made parts to attach.
Custom connection types
Connection types can be defined per formation, and ports cast compatible types automatically.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Pack and datapack authors
Datapacks can add formations and connection types without writing Java code.
Mod developers
Developers can attach their own capabilities and behaviour to formations through the API.
Who it’s for: Pack makers who want custom formations in a datapack, and developers building mods that rely on formation logic, both on single-player worlds and servers.
Questions
Does Formation Arrays need EasyGui?
Does the server need Formation Arrays?
Can datapacks define formations?
In the catalog
Formation Arrays is one of 3,514 Library mods on ModsFinder, and one of 1,449 Library mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from Lucent
Similar mods
What the author says
bring formations to minecraft using this dedicated API - create and manage custom formations - let formations communicate with eachother - Access token capability for custom behaviour for team mods - Formation plate cabapility built in - Formation power source capability built in
Official listing
- Modrinth page
- modrinth.com/mod/formation-arrays
- Owner
- Lucent
- Published
- 2026-01-20
- Updated on Modrinth
- 2026-01-20
- Facts verified
- 2026-10-15