base on Optimizes mesh and polygon colliders in Unity # Unity Collider Optimizer This package is meant for: - `MeshCollider` optimization (3D) via bundled gltfpack binaries |  |  |  | |:---:|:---:|:---:| | Original Mesh | Unity Mesh Collider | Optimized Mesh Collider | |**Tris, Verts Count**| *3032 tris, 2512 verts* | *918 tris, 592 verts* | - `PolygonCollider2D` optimization (2D) using RDP line simplification |  |  |  | |:---:|:---:|:---:| | Original Sprite | Unity Polygon Collider | Optimized Polygon Collider | |**Path Count**| *214 paths* | *23 paths* | ## Requirements - Unity 2020.2 or newer recommended (for `MeshColliderCookingOptions`) - A glTF/GLB importer package in your project: - `com.unity.cloud.gltfast` (glTFast) or - `com.unity.formats.glTF` (UnityGLTF) - Supported OS for the included gltfpack binaries: - Windows - macOS (Intel & Apple Silicon) - Linux > [!NOTE] > If you don’t have a GLB importer, the tool can’t re-import the simplified mesh and will log an error telling you to install one ## Usage #### Install - Download the `collider-opt-pkg-v005.unitypackage` package from the [Releases](https://github.com/aniketrajnish/Unity-Collider-Optimizer/releases/tag/005) section and import in your Unity project - Follow the prompt to install the glTF/GLB importer - (macOS/Linux) If the `gltfpack` binary isn’t executable, the tool will attempt to `chmod +x` automatically #### Optimize Colliders - Select a GameObject with a `MeshCollider` (3D) or `PolygonCollider2D` (2D) - Open context menu by right clicking the component header -> `Optimize Collider` - If needed you have option to Load/Save/Reset Collider aswell #### Adjust Params - To adjust params for the optimizer go to `Tools -> Collider Optimizer` - **Mesh Optimization Params**: - `Contraction` : higher contraction -> fewer triangles kept - `Recalc Normals` : recalculate normals after import - `Convex` : sets `MeshCollider.convex = true` (Unity may auto-reduce to ≤255 tris) - `Aggressive (-sa)` : simplifies aggressively (more tris reduced) - `Permissive (-sp)` : simplifies permissively (less tris reduced) - **Polygon Optimization Params**: - `Tolerance` : maximum perpendicular distance new path is allowed to deviate from the original path (higher tolerance -> fewer lines kept) - `Tolerance Mode` : - `World` : interpreted in world units - `Relative` : interpreted as fraction of per-path bbox diagonal - `Scale By Bounds` : In `World` mode, multiply tolerance by each path’s bounds diagonal (useful for differently sized shapes) #### Presets - You get the option to define presets for different param sets you'd like to save - Create presets via `Assets -> Create -> ColliderOptimizer -> Mesh Preset or Poly Preset` - In `Tools -> Collider Optimizer` window assign these presets to make them active - Without an active preset the settings are stored in `Project Settings` at `ProjectSettings/ColliderOptimizerSettings.asset` - `Reset to Defaults` will update the preset (if assigned) or the project settings to the default values https://github.com/user-attachments/assets/9530f417-eb80-4108-ab7c-36454a7a409c ## Performance Comparison https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/e134f0c6-4c08-4552-b69f-22e7f3b61ebe https://github.com/aniketrajnish/Unity-Collider-Optimizer/assets/58925008/cfba7837-a81e-4891-9594-501fbf31680f ## Gotchas - For skinned meshes, the tool bakes a static combined mesh for collider usage (as intended for physics), not skinning, anyways I won't use a `MeshCollider` for a skinned mesh - Extremely degenerate or non-triangular topologies are skipped - `glb import produced no loadable assets` <br> Install/reinstall a GLB importer package (UnityGLTF or glTFast) & reoptimize - Unity limits convex colliders to ≤255 tris, it may auto-simplify further - If you see warnings about very large triangles (>500 units), check your model scale. The tool bakes transforms, but mismatched import scales can still yield oversized geometry - The tool attempts to `chmod +x` the `gltfpack` binary, if gatekeeper still blocks it, allow it in System Settings or remove quarantine attributes manually ## Contribution Contributions to the project are welcome, consider making a PR ## License MIT License ", Assign "at most 3 tags" to the expected json: {"id":"3238","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"