https://github.com/fuqunaga/vatbaker

A tool to bake VAT (Vertex Animation Texture) from AnimationClip with sample shaders for Unity.
https://github.com/fuqunaga/vatbaker

animation unity3d vat

Last synced: 2 days ago
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A tool to bake VAT (Vertex Animation Texture) from AnimationClip with sample shaders for Unity.

• Host: GitHub
• URL: https://github.com/fuqunaga/vatbaker
• Owner: fuqunaga
• License: other
• Created: 2022-07-27T09:48:10.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-12-04T07:46:18.000Z (about 1 month ago)
• Last Synced: 2024-12-30T00:07:58.206Z (10 days ago)
• Topics: animation, unity3d, vat
• Language: ShaderLab
• Homepage:
• Size: 39.4 MB
• Stars: 166
• Watchers: 4
• Forks: 27
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# VatBaker

A tool to bake [VAT (Vertex Animation Texture)][VAT] from AnimationClip with sample shaders for Unity.

[VAT]:https://medium.com/tech-at-wildlife-studios/texture-animation-techniques-1daecb316657

![](Documentation~/vatbaker.webp)

# Installation

**Edit > ProjectSettings... > Package Manager > Scoped Registries**

Enter the following and click the Save button.

```

"name": "fuqunaga",

"url": "https://registry.npmjs.com",

"scopes": [ "ga.fuquna" ]

```

![](Documentation~/2022-04-12-17-29-38.png)

**Window > Package Manager**

Select `MyRegistries` in `Packages:`

![](Documentation~/2022-04-12-17-40-26.png)

Select `VatBaker` and click the Install button

# Usage

1. **Window > VatBaker**

1. Set a GamObject with Animation and SkinnedMeshRenderer.

1. (Optional) Set other parameters.

1. Push the Bake button.

1. Assets are created under `Assets/VatBakerOutput` and a VAT GameObject is put in the hierarchy.

![](Documentation~/vatbaker_window.webp)

# Use VAT on your shader

### Use VAT functions at the vertex shader.

```hlsl

#include `Packages/ga.fuquna.vatbaker/Shader/vat.hlsl`

```

vertex shader

```hlsl

float animationTime = CalcVatAnimationTime();

float vertexPositionLocal = GetVatPosition(vertexId, animationTime);

float vertexNormalLocal = GetVatNormal(vertexId, animationTime);

```

See [VatUnlit.shader][VatUnlit], [VatSurfaceStandard.shader][VatSurfaceStandard]

[VatUnlit]:https://github.com/fuqunaga/VatBaker/blob/main/Packages/ga.fuquna.vatbaker/Shader/VatUnlit.shader

[VatSurfaceStandard]:https://github.com/fuqunaga/VatBaker/blob/main/Packages/ga.fuquna.vatbaker/Shader/VatSurfaceStandard.shader

### Set material properties for VAT.  

| Property name   | Value               |

| --------------- | ------------------- |

| _VatPositionTex | Assets/VatBakderOutput/\*/\*.posTex.asset |

| _VatNormalTex   | Assets/VatBakderOutput/\*/\*.normTex.asset   |

| _VatAnimFps   | Baked animation fps   |

| _VatAnimLength   | Baked animation length[sec]   |

It is recommended to duplicate the material under Assets/VatBakerOutput and change the shader so that the original property values can be used as they are.

# Example Asset

- [Rhino Animation Walk](https://sketchfab.com/3d-models/rhino-animation-walk-a915d9179fe6422b9d669a3a0d726b8e) © GremorySaiyan [(Licensed under CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/)

# Reference

- [Texture Animation: Applying Morphing and Vertex Animation Techniques](https://medium.com/tech-at-wildlife-studios/texture-animation-techniques-1daecb316657)

- [VertexAnimator](https://github.com/nobnak/VertexAnimator)

- [Animation-Texture-Baker](https://github.com/sugi-cho/Animation-Texture-Baker)