KarnsLib

1. 01

   Cubic and sphere hitboxes

   Cubes and spheres are drawn with particles to show the volume a hitbox covers.

2. 02

   Cylinder and arc shapes

   Cylinders and arcs join the set, so curved or round areas can be marked on the ground or in the air.

3. 03

   Line shapes

   Lines can be defined by two points, or by a single point together with a rotation and a length.

4. 04

   Entity detection in shapes

   The library returns the entities, living entities and players that fall inside a drawn shape.

5. 05

   Local position command

   A Minecraft command lets a shape be placed at a local position, which helps in command-based setups.

Who it’s for: Mod authors who need particle-drawn hitboxes and server owners running adventure maps or command setups on Minecraft 1.20.2 – 1.20.4 with Fabric.

Solid Hitbox is a Fabric mod for 1.21.11 that runs on the client and server together under a custom license, and it is not open source. Hitbox+ is client-side only, released under All rights reserved, and covers 1.21.11 – 26.3. KarnsLib differs from both by running on the server alone, for 1.20.2 – 1.20.4, and by drawing shapes rather than showing entity boxes.