Replace Havok Convex Decomposition with Open Source Library

Request for Proposal

The Second Life viewer currently depends on Havok's proprietary convex decomposition library for generating physics geometry during mesh uploads. This creates several problems:

1. Open-source compatibility: This proprietary dependency conflicts with potential open-source initiatives and limits community contributions to the viewer
2. Technical limitations: Newer open-source solutions offer better performance and accuracy for convex decomposition

High-Level Requirements

Replace the Havok convex decomposition module with CoACD, V-HACD or similar open-source library:

• Evaluate CoACD and alternative libraries (e.g., V-HACD) for performance and quality
• Implement library integration, replacing Havok decomposition dependency
• Ensure physics data format remains compatible with server-side physics simulation

This is a viewer-only change that should not require server-side modifications, keeping scope minimal.

Additional Context

• Would benefit from performance benchmarking of candidate libraries before selection
• Consider creating a mesh physics test suite if one doesn't exist
• May want to consult with major content creators during testing phase to ensure workflow compatibility

The issue names no source files, tests, or entry points; begin by locating the viewer's Havok convex-decomposition integration and mesh-upload physics-data path. Evaluate CoACD and V-HACD, then define completion as an open-source replacement that preserves server-compatible physics data, with performance and quality benchmarks.