Unity Collider Optimizer

Optimizes Mesh & Polygon colliders in Unity.

Polygon Collider Optimizer

Original Sprite	Unity Polygon Collider	Optimized Polygon Collider
Path Count	213 paths	23 paths

The tool uses a C# implementation of the Ramer Douglas Peucker Algorithm to smooth the polylines and reduce the number of paths created by a Polygon Collider in Unity.

Performance Comparison

https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/e134f0c6-4c08-4552-b69f-22e7f3b61ebe

You can run this test on your machine by cloning the project and going to the Polygon Collider Optimization Test scene in Unity.

Usage

• Download the collideroptimizationpackage_2d_v004.unitypackage package from the Releases.
• Import all the assets from the package in your unity project.
• Attach the PolygonColliderOptimizer.cs script on your 2D sprite.
• Adjust the optimizationFactor to control the amount of optimzation you need.

https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/74f5bdd1-f5c8-4c44-b745-78211919aae3

Mesh Collider Optimizer

Original Mesh	Unity Mesh Collider	Optimized Mesh Collider
Triangles Count	9132 tris	2416 tris

The tool uses the Computational Geometry Unity Library by Erik Nordeus 🐐 to perfrom the Quadric Error Metrics simplification on the shared mesh of the mesh collider.

Performance Comparison

https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/cfba7837-a81e-4891-9594-501fbf31680f

You can run this test on your machine by cloning the project and going to the Mesh Collider Optimization Test scene in Unity.

Usage

• Download the collideroptimizationpackage_3d_v004.unitypackage package from the Releases.
• Import all the assets from the package in your unity project.
• Attach the MeshColliderOptimizer.cs script on your 2D sprite.
• Choose the connecting mode between Fast, Precise, and No.
• Adjust the optimizationFactor to control the amount of optimzation you need.
• Choose the mesh style to be Soft, Hard or both.
• Warning: Choosing the "Fast" mode would likely lead to errors, Precise mode is recommended for most of the meshes.

https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/ddb08b48-d241-494c-a6f4-0a822424964a

Updates

v004

• Added the functionality to save and load the optimized colliders as assets.
• Fixed the refresh bug.

https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/ba42c61c-4ea1-419d-bf81-324304a218b8

Contribution

Contributions to the project are welcome. Currently working on converting the QEM algorithm to a coroutine to stop the main Unity thread from freezing.

Known Bugs

• ~~If a prefab is made out of a gameobject having Polygon Collider Optimizer, it keeps refreshing itself.~~ [FIXED]
• Choosing Hard Edge Mesh Style decreases the number of triangles but induces additional vertices (doesn't affect the performance).

License

MIT License