Bonk 4.0.0

3D collisions for GameMaker LTS 2026

Download the .yymps

 

Bonk is a 3D collision library. It supports boolean "inside" tests between shapes as well as "push out" tests that return a vector that separates the two shapes. Bonk also has functions for raycasting. The library contains basic collision mechanics suitable for most types of 3D games - shooters, platforms, RPGs etc. Bonk contains a very basic grid collision system that optimizes the number of shape-shape collision checks that need to be performed. This is helpful for situations where you have multiple shapes colliding (which is most situations!).

Please note that cylinders and capsule are z-aligned and cannot be rotated. Additionally, rotated boxes can only be rotated around the z-axis.

	Axis-Aligned Box	Capsule	Cylinder	Quad	Rotated Box	Sphere	Triangle	Line/Ray	Point
Axis-Aligned Box	✓	✓	✓			✓		✓	✓
Capsule	✓	✓	✓	✓	✓	✓	✓	✓	✓
Cylinder	✓	✓	✓		✓	✓		✓	✓
Quad		✓				✓		✓
Rotated Box		✓	✓			✓		✓
Sphere	✓	✓	✓	✓	✓	✓	✓	✓	✓
Triangle		✓				✓		✓
Line/Ray	✓	✓	✓	✓	✓	✓	✓
Point	✓	✓	✓			✓

You may also be interested in Dragonite's 3D Collisions. Dragonite also has many videos on 3D topics in GameMaker.