anim-to-bvh Converter Library

This library provides tools for manipulating .anim and .bvh files, primarily for Second Life. It allows converting animations while preserving Bento bones and ensuring compatibility with Avastar 3.1.3, which is currently the most reliable option for importing BVH files into Blender.

🚀 Online Tool

A simple web interface for converting .anim files to .bvh is available here:
🔗 anim-to-bvh Online Converter

📌 Features

• Supports Bento bones – ensuring compatibility with modern Second Life avatars.
• Rotation conversion fully tested – positional animation should work, but has not yet been verified.
• Optimized for Avastar 3.1.3 – later versions may have issues with BVH import.

⚠️ Important Notes on Offsets

.anim files do not contain offset information, which can cause issues when importing the resulting .bvh into Avastar. (For Second Life itself, offsets are not necessary.)

To ensure correct offsets in Blender, we recommend using a donor BVH:

1. Export any animation of your avatar, ensuring that all bones are included.
2. If needed, simply copy a static T-pose and paste it into multiple frames.
3. Use this donor BVH when converting .anim files to apply correct offsets.

Alternatively, if your avatar is close to the default Second Life skeleton, you can select "Use default offsets" in the converter. In this case, no additional setup is needed.

This library is still in active development, and further testing will be done to improve positional animations and ensure broader compatibility.
Contributions and feedback are welcome! 🚀