# Mesh Optimizer For Unity
[](https://github.com/refiaa/MeshDecimater_Unity/releases/latest)
[](https://github.com/refiaa/MeshDecimater_Unity/releases/latest)
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[](https://github.com/refiaa/MeshDecimater_Unity/issues)
[](#)
(using Unity 2022.3.22f1)
| **English** | [日本語](./README.jp.md) |
This plugin enables a functionality similar to Blender's decimate feature within Unity.
This plugin supports both `Mesh Filter` and `Skinned Mesh Renderer`.
It can handle used on any mesh that can be imported into Unity (`.fbx`, `.glTF`, `.dae (Collada)`, `.obj`, `.GLB`, `.asset`, etc.).
Additionally, even after optimization, BlendShapes, Bones, Bone Weights, and Sub Meshes will be preserved.
decimate functions are created by using **UnityMeshSimplifier**[[1]][UnityMeshSimplifier_github]
### Installation
---
**How to Install**
1. Download the latest release file (Unitypackage) from [here][download_link2] and import it to complete the setup.
**File Tree Structure**
tree have to looks like this
```sql
Assets
└─ MeshDecimater_Unity // MeshOptimizer_Unity directory name is `MeshDecimater_Unity`
│
├─ UnityMeshSimplifier
│
├─ .gitignore
│ LICENSE
│ VERSION
│
├─Editor
│ DecimaterMain.cs
│ DecimaterMain.cs.meta
│ MeshInfoDisplay.cs
│ MeshInfoDisplay.cs.meta
│ MeshPreviewer.cs
│ MeshPreviewer.cs.meta
│ MeshRevertManager.cs
│ MeshRevertManager.cs.meta
│ UpdateNotifier.cs
│ UpdateNotifier.cs.meta
│ WireframeDrawer.cs
│ WireframeDrawer.cs.meta
│
├─Runtime
│ MeshDecimaterUtility.cs
│ MeshDecimaterUtility.cs.meta
│ MeshUtils.cs
│ MeshUtils.cs.meta
│
└─Shader
Wireframe.shader
Wireframe.shader.meta
```
### How to use
---
Select an object with a mesh from the Hierarchy or choose it from the ObjectField to use the plugin.
Similar to Blender, adjust the `Decimate Level` and press `Apply Decimation` to execute the decimation.
Clicking `Revert` will restore the original file.
Please note that Revert will not work after clicking on a different object (the original mesh will remain, so you can replace it to restore).
### Update History
---
v0.0.1:
> • Initial release.
v0.0.2:
> • Fixed an issue where Components disappeared after Apply.
v0.0.3:
> • Resolved issues related to BlendShapes.
>
> • Fixed a problem where Skinned Mesh Renderer wasn't updating in Mesh Preview after Apply.
v0.0.4:
> • Optimized decimation for Skinned Mesh Renderer.
v0.0.5:
> • Fixed 'IndexOutOfRangeException' occurring on some models.
>
> • Resolved issues with tangent duplication and calculation.
v0.0.6:
> • Changed preview material from external reference to internal code generation.
v0.0.6.2:
> • Fixed an issue where Material and Wireframe weren't loading in some cases.
>
> • Improved mesh information after decimation.
>
> • Enhanced display of mesh size reduction.
v0.0.7:
> • Fixed `FileNotFoundException Error`.
v0.0.8:
・Resolved a problem where submesh material count became 1 after decimation.
・Changed display method
> Modified wireframe shader.
>
> Fixed an issue where preview material wasn't applied to submeshes.
・Fixed an issue where decimated objects disappeared when uploaded to VRC
> Now the actually decimated object is saved.
v0.0.9:
> Change name "Decimate" to "Optimizer"
>
> `Revert to Original` Added.
>
> `Optimize(decimate) level` is now save globally
v0.0.9.1:
> Minor Bug fixes
v0.0.9.2:
> Bug fix ;
>
> - Fix Mesh vanishing problem cause by `(Clone)` and `_Decimated`.
>
> - Fix SkinMeshRenderer issue in apply optimization
>
> - Fix Revert Button to undo
>
> - Change name of some GUI (`Revert` to `Undo`, `Revert to Original` to `Reset To Original Mesh`)
v0.0.9.3:
> - Add update notification function
>
> - Minor Bug fixes
```
work confirmed in
・Unity 2022.3.22f1
・Unity 2019.4.31f1
```
[UnityMeshSimplifier_github]: https://github.com/Whinarn/UnityMeshSimplifier
[download_link]: https://github.com/Whinarn/UnityMeshSimplifier/releases/tag/v3.1.0
[download_link2]: https://github.com/refiaa/MeshDecimater_Unity/releases/latest