Lagrange Release v6.39.0

Infrastructure

• 🏗️ Compilation fixes for Xcode 26
• 🏗️ Fix CMake sanitizer setup for MSVC
• 📌 Update earcut.hpp dependency to f36ced7
• 📌 Update cpptrace to 1.0.4
• 📌 🐛 Update PoissonRecon dependency to fix a memory allocation bug

Core Module

• 🎨 Add overload to SurfaceMesh::delete_attribute to accept id as input

IO Module

• 🐛 Throw error when saving float/double texture to glTF file
• 📖 Add explicit warning when loading glTF without explicit stitching behavior
• 🎨 Add new LoadOptions::quiet to silence IO related log messages
• 🎨 Update STL mesh load to not stitch vertices by default for consistency with other formats

Solver Module

• ✨ Add support for Spectra-based sparse eigenvalue solver
  • [generalized_]selfadjoint_eigen_[largest|smallest]() in C++
  • lagrange.solver.eigsh() in Python (follows a similar API to scipy.linalg.eigsh())

Texproc Module

• 🐛 Fix out-of-bound access in rasterization code
• 🐛 Add checks to ensure number of channels consistency
• 🐍 Update texture_from_multiview.py to accept list of render images + ensure output uses .exr
• 🐛 Fix vertical flip in geodesic_dilation code introduced in v6.38.0
• 🐛 Fix image transpose issue in Python bindings
• 🐍 Add geodesic_dilation.py demo

Geodesic Module

• ✨ New geodesic module to compute single-source and point-to-point geodesic distance
  • Added GeodesicEngine[...] class for repeated computation
  • Choice of algorithm between DGPC, MMP and Heat
  • Two methods available: single_source_geodesic() and point_to_point_geodesic()

Polyddg Module

✨ New polyddg module that implements most of the operators from this paper:

De Goes, F., Butts, A., & Desbrun, M. (2020).
Discrete differential operators on polygonal meshes.
ACM Transactions on Graphics (TOG), 39(4), 110-1.

Documentation

• 📖 Docstring updates for scene module
• 📖 Update voxelize_mesh example code to read/write .vdb files
• 📖 Fixed typos and grammar in comments with Copilot

Python Bindings

• 📌 Updated scikit-build core to 0.11.6
• 📌 Updated sphinx and autoapi
• 🏗️ Set upper-bound to Python <3.14 due to nanobind uncertainty
• 📖 Fixed generated Sphinx documentation due to refactored stub files

Full Changelog: v6.38.0...v6.39.0

Lagrange Release v6.38.0

Infrastructure

• 🏗️ New CMake option LAGRANGE_PROPAGATE_WARNINGS
• 📌 Update Catch2 to v3.10.0
• 📌 Update WindingNumber to v0.3.15
• 🏗 Enable \Z7 flag in MetaBuild for debug build

Core module

• 🏗️ Replace M_PI with lagrange::internal::pi
• ✨ Add compute_facet_circumcenter
• ✨ Add compute_facet_vector_area
• 🐍 Add SurfaceMesh.edges in python binding
• 🎨 Update point_triangle_squared_distance and point_segment_squared_distance to be dimension independent

IO module

• 🐛 Bug fix in directory creation when saving obj file

Texproc module

• 🐛 Add check for flipped UV triangles
• 🗑️ Cleanup geodesic dilation code

BVH module

• 🎨 Refactor AABB as a stand-alone class
• 🎨 Add support for TriangleAABBTree
• 🎨 Update EdgeAABBTree
• 🎨 Add python binding for TriangeAABBTree and EdgeAABBTree

Documentation and other updates

• 📌 Update Doxygen and CSS version
• 📌 Update website dependency
• 💄 Update code format for the entire repo
• 📖 Improve texproc documentation
• 🏗️ Add explicit ref to Doxygen comments
• 🏗️ Remove doxygen autolink
• 📖 Update python doc strings
• 🐛 Fix python stub generation

Lagrange Release v6.37.0

Infrastructure

• 🏗️Improved DLL copies with CMake. This fixes some Jenkins failure cases.
• 🏗️Improved code-coverage.cmake. Prevents overwriting job pools configurations for downstream projects, improves cross-platform support, and adds configuration options.
• 🏗️Run patchelf on downloaded MKL to prevent linking issues.
• 🐛Fixed ODR issues.
• 📌Updated MshIO to v0.1.0
• 📌Updated miniz from 2.2.0 to 3.0.2

Core Module

• 🎨Improved stability in remove_duplicate_vertices(), it now keeps vertices order if possible

Python Bindings

• 🏗️Moved all nanobind includes to a single file <lagrange/python/binding.h> to avoid potential ODR violations.
• 📖Updated pyproject.toml to have urls.documentation and urls.repository
• 📌Updated nanobind to v2.9.2. This adds support for in-place updates to dicts, lists, etc., such as my_dict["key"] += 1

Scene Module

• 🐛To fix a mutable element issue in python bindings, changed Scene types from std::vector<T> to lagrange::SafeVector<T> which is an alias for
  • std::vector<std::shared_ptr<T>> when compiled for python bindings
  • std::vector<T> otherwise, unchanged from before
• 🎨Updated Scene::far_plane to be optional
• ✨Added camera matrix utilities in <lagrange/scene/scene_utils.h>
  • Eigen::Affine3f camera_view_transform(const Camera& camera, const Eigen::Affine3f& world_from_local)
  • Eigen::Projective3f camera_projection_transform(const Camera& camera)

Solver Module

• ✨New solver module! It manages dependencies across platforms and provides aliases for solver wrappers. Currently contains <lagrange/solver/DirectSolver.h>

Texture Signal Processing

• ✨New texproc module! It provides texture-space operations such as filtering (smoothing, sharpening), stitching, compositing.

Lagrange Release v6.36.0

Infrastructure

• 🏗️ Add export macros for filtering module
• 🏗️ Minor CMake cleanups
• 📌 Update cpptrace to 1.0.3 and removed StackWalker

Core Module

• 🎨 New is_closed() function for SurfaceMesh
• 🎨 Support degenerate polygons in compute_weighted_corner_normal()
• 🎨 Support for indices shared across vertices in weld_indexed_attribute()
• 🐛 Fix out-of-bound bug in split_edges() for 2D meshes

IO Module

• 🎨 Added save_simple_scene_obj()
  • Supports multiple nodes and instances
• 🎨 Added save_scene_obj()
  • Supports uvs, materials, and multiple nodes and instances
• 🏗️ Changed io tests to write to a designated output directory (build/tmp)
• 📖 Improved Python documentation in io and scene
• 🎨 New scene_convert example

BVH Module

• ✨ New weld_vertices() function for SurfaceMesh

Volume Module

• 🎨 Added sample_vertex_normal() to sample normals from VDB grid

Lagrange Release v6.35.0

Infrastructure

• 🏗️ Add existence check in get_data_path and get_data_folder for loading unit test assets

Core and IO modules

• 🎨 Indexed attribute support for saving in MSH format
• 🐛 Throw exception for unsupported format in load_scene and load_simple_scene
• 🐛 Bug fix in split_triangle
• 🐛 Bug fix in map_attribute
• 🎨 Add centroid-fan support in triangulate_polygonal_facets
• ✨ New split_facets_by_material function

Filtering module

• 🎨 Support smoothing of multi-channel attribute

Lagrange Release v6.34.0

Infrastructure

• 🏗️Fixes for shared library mode
• 🏗️CMake fixes (openblas, special-assimp preset)
• 🏗️Wasm fixes, and enabled wasm unit tests
• 🏗️Open-source script fixes
• 🐍Python: Set OSX deployment target to 13

Lagrange Release v6.33.0

Infrastructure

• 📌 Updated pyproject.toml and script dependencies
• 📌 Updated vcpkg baseline to point to 3di registry
• 🏗 Fix compatibility with CMake 4
• 🏗 Fix MKL setup for open-source Python wheels
• 🏗 Compilation fixes for wasm support

Core module

• 🎨 compute_tangent_bitangent: option to keep existing tangent attribute
• 🐛 Respect triangulate option in all lagrange::io function
• 🐛 Recreate output attribute when search yields a mismatch (e.g. wrong type or num channels)
• 🐛 Robustness improvement in unflip_uv_triangle
• 🐛 Bug fix in compute_uv_distortion

Filtering module

• 🎨 Add option to smooth vertex positions directly
  • Previously smoothing was done on normals, followed by a vertex fitting step
• ✨ Scalar attribute smoothing
• 🎨 Use non-MKL solver for open source python wheel

Lagrange Release v6.32.3

Trigger python wheel release.

Lagrange Release v6.32.2

New release to publish previously broken Python wheels.

Lagrange Release v6.32.1

Add missing filtering module in pyproject.toml