[RELEASED] OpenFracture - Fracture and slice meshes during runtime (open source!)

Link to code on GitHub



Overview
OpenFracture is an open source Unity package for fracturing & slicing meshes. This package supports both convex and non-convex meshes as well as meshes with holes. This means any arbitrary geometry can be fractured/sliced (as long as the geometry is closed and non-intersecting).

The package includes three samples (featured in the video), one for each of the main scripts

• FractureDemo - Runtime fracturing
• PrefractureDemo - Mesh pre-fractured in the editor
• SliceDemo - Runtime slicing

I initially planned on releasing this as a paid asset on the Unity Asset Store. However, I realized near the end of development that I'm somewhat burnt out on this project and don't have an interest in supporting it commercially. I decided to release it as open-source because I put a lot of work into this and want others to enjoy it and use it in their games! I have released it under the MIT license, so you can basically do with it as you please. Enjoy!

Features
Fracturing

• Runtime and Editor Support - Fracture meshes either run-time or pre-fracture in the editor for optimal performance.
• Arbitary Mesh Geometry - Support for convex and non-convex meshes as well as meshes with multiple holes. Note: Meshes must be closed and cannot have self-intersecting geometry.
• 2D/3D Fracturing - Ability to specify which planes the mesh will be fractured in. This is useful when a mesh is effectively 2D (e.g. glass) and only needs to be fractured on two planes.
• UV Remapping - Texture coordinates are preserved along edges where mesh is fractured/sliced.
• Custom Inside Material - Use custom material for inside faces. Supports textures with options for UV scaling & offset.
• Recursive Fracturing - Fragments can be broken down into smaller fragments.
• Multiple Trigger Types - Trigger fractures using triggers, collisions or pressing a key. Additional trigger types can be added easily.
• Tunable Fragment Count - Directly specify the number of fragments to easily tune performance for different platforms.
• Asynchronous - Support for asynchronous runtime fracturing (single-threaded)
• Detect Floating Fragments - Detects if multiple, isolated fragments are created when fracturing non-convex meshes and treats each fragment as a separate mesh.
• OnCompletion Callback - Trigger any behavior after the fracturing is complete, such as playing an AudioSource or executing other in-game logic.

Slicing

• Runtime Slicing - Slice objects at runtime
• Recursive Slicing - Slice objects multiple times and slice the fragments into smaller pieces
• Detect Floating Fragments - Detects if multiple, isolated fragments are created when slicing non-convex meshes and treats each fragment as a separate mesh.
• UV Remapping - Texture coordinates are preserved along edges where mesh is fractured/sliced.
• Custom Inside Material - Use custom material for inside faces. Supports textures with options for UV scaling & offset.
• OnCompletion Callback - Trigger any behavior after the slicing is complete, such as playing an AudioSource or executing other in-game logic.

Link to code on GitHub

 

This looks awesome! Thank you for sharing and making this open source, some people will definitely learn a lot by looking at the code (specially beginners like me)
Cheers!

 

Saw it on Instagram I believe. Thanks for sharing!

 

Wonderful! Amazing job! By any chance is there a way to only split concave pieces? Basically by finding the edges that make the pieces concave and perform a plane cut from that edge?

 

Amazing work man! Can't believe this is getting such little attention. All the other free implementations I've looked at are major buggy.