Lagrange Release v6.40.0

Dependencies

• 📌 Updated oneTBB to 2022.3.0 and oneMKL to 2025.3.0
• 📌 Updated spdlog from 1.15.1 to 1.16.0
• 📌 Updated fmt from 11.1.4 to 12.0.0
• 📌 Updated EnTT from 3.13.2 to 3.16.0

Core Module

• ✨Added compute_uv_area function
• 🎨 compute_edge_is_manifold can now compute a per-edge attribute indicating manifoldness
• 🎨 Added support for inverting normal/bitangent attributes when flipping facets
  • orient_outward will now flip normal/bitangent attributes
• 🐛 Fixed infinite loop issue in earcut triangulation

Python Bindings

• 🐍 Added python bindings for:
  • compute_edge_is_oriented
  • compute_vertex_is_manifold
  • compute_edge_is_manifold
• 🐍 Added python bindings for SurfaceMesh::foreach_* functions
• 🎨 Improved meshstat.py: added orientation check, non-manifold count, facet stats

Primitive Module

• 🎨 Now open source!

IO Module

• 🏗️ Silenced IO warnings in unit tests
• 🎨 Added quiet option for saving meshes

Texproc Module

• 🎨 Added option to regularize the stiffness matrix in texture filtering and stitching
• 🎨 Added option to clamp output values in texture filtering / stitching / compositing
• 🎨🐍 Exposed options to C++ examples and python bindings
• 🐛 Fixed non-deterministic __randomize option in texture stitching
• 🏗️ Made unit tests single-threaded to ensure reproducibility, and changed to stricter tolerances

Polyscope Module

• ✨ New dedicated module to facilitate interop with Polyscope
  • Register explicit structure:
    • register_edge_network
    • register_mesh
    • register_point_cloud
  • Infer structure type from mesh connectivity:
    • register_structure
  • Create or update Polyscope attribute based on Lagrange's:
    • register_attribute