Lagrange Release v6.20.0

Infrastructure & Bugfixes

• 🚧 Fix nightly wheel version to include date
• 🚧 Fix timeout in GitHub actions CI
• 📖 Add related files in SurfaceMesh header
• 📖 Fix Doxygen grouping for core utilities functions
• 🐛 Fixed bug in chain_edges for complex edge networks

Python Bindings

• 🐍 Add missing binding for compute_uv_distortion
• 🐍 Add missing binding for AttributeShrinkPolicy
• 🐍 Add pythonic API for functions that take an option struct
• ✨ Relax Attribute.data assignment to also take python list
• ✨ Relax Attribute.insert_elements argument to allow python list
• 📖 Add missing docstrings for various types
• 📖 Add docstring for all utility and clean up functions docstrings

Core Module

• New filter_attributes() function and AttributeFilter object
• Possible filters:
  • included_attributes (name or id)
  • excluded_attributes (name or id)
  • included_usages (bitfield)
  • included_element_types (bitfield)
• lagrange::cast() now supports a AttributeFilter input filter
• New lagrange::scene::cast() helper function

Scene and IO

• Added support for glTF-style scene extensions
• By default, extensions use a Json-like representation
• Optionally, use converters to load user types

Lagrange Release v6.19.0

Infrastructure

• Added CMake option to enable/disable threads with WASM
• Update StackWalker + sscache build
• Enable all modules in GitHub actions
• Fix Asan and Tsan issues in CI
• Enable core/io module without RTTI
• Updated Happly to compile without RTTI

Core module

• Bug fix in chain edges
• Bug fix in combine_mesh() on meshes with dimension != 3
• transform_mesh() now supports 2D meshes
• lagrange::invalid<T>() now returns inf instead of max for floating point types
• Added eigen_to_surface_mesh() conversion function
• Added missing Python binding for compute_dijkstra_distance()

Scene module

• Add scene-to-mesh and mesh-to-scene conversion
• Add python binding

IO module

• Support point cloud loading from .ply files
• Update TinyOBJ to support large polygon facets
• Update load_mesh() with correct aggregation of meshes with transforms

Subdivision module

• Add SurfaceMesh support
• Add support for sharp edges, vertices and holes
• Add support for limit surface interpolation and limit normal computation
• Add support for interpolating vertex/indexed attributes such as UV/color etc.
• Add python binding

Lagrange Release v6.18.0

Continuous Integration

• Added StackWalker on Windows for crash debugging
• Fixed AddressSanitizer on Windows

Dependencies and Infrastructure

• Updated nlohmann_json recipe to avoid an issue when used from Lagrange as a dependency
• Updated tbb to v2021.11.0
• Updated Catch2 to 3.4.0
• Updated OpenVDB to v11.0.0
• Added ufbx dependency
• Add flag to enable/disable wasm threads
• Adds an error message when using Xcode 15.0 with the new linker

Core Module

• Fixed issue in topology computation with isolated vertices
• Fixed weld_indexed_attribute
• Fix bug when chaining complex edge loops

Scene Module

• Added Scene datastructure

IO Module

• Added load_mesh_fbx, load_simple_scene_fbx
• Added: load_scene, load_scene_gltf, load_scene_assimp, load_scene_fbx, load_scene_obj
• Added save_scene and save_scene_gltf
• Point cloud support in .ply load

Python Bindings

• Added support for Python 3.12
• Updated nanobind to v1.8.0
• Added simplified bindings to image module
• Added python bindings to the new Scene datastructure
• Added python bindings to all the new scene IO functions

Lagrange Release v6.17.0

Infrastructure and Dependencies

• CMake updates:
  • More robust handling of BUILD_SHARED_LIBS (enabled CMP0077 and CMP0126)
  • Fixed soname and install behavior for MKL and Arpack
  • Min CMake version bumped to 3.25
• Fix floating-point issues in unit test for Xcode 14+
• Minor compile fixes for C++20
• Fix UBSan issues
  • In core module with lagrange::safe_cast()

SurfaceMesh Updates

• Fix combine_meshes() for hybrid meshes (e.g. quad dominant)
• 5x speedup in remove_duplicate_facets()
• Fix corner merging in tangent/bitangent computation to match mikktspace
• unify_index_buffer() now supports edge attributes
• New tag AttributeUsage::Position
• New transform_mesh() function to apply affine transform to a mesh
  • Transformations applied based on usage tag (Position/Normal/Tangent/Bitangent)

IO Module

• Fix loading of property lists in .ply

Lagrange Release v6.16.0

Infrastructure and dependencies

• Update boost to 1.82.0 and leverage upstream boost cmake setup
• Add support for .netrc in CMake setup
• Rename CMake variable LAGRANGE_ARTIFACTORY_KEYFILE to ARTIFACTORY_KEYFILE
• Add LAGRANGE_FMT_EIGEN_FIX (off by default) to bypass MSVC C1001 compiler error

Core module

• Improve value attribute support in unify_index_buffer and SurfaceMesh::create_attribute
• Add lagrange::cast support for casting SurfaceMesh of different scalar and index types
• Add SurfaceMesh support to remove_topologically_degenerate_facets (triangle mesh only) and remove_duplicate_facets

Python module

• Add optional shared parameter to SurfaceMesh.attribute
• Migrate build backend to scikit-build-core
• Fix reference count leak
• Update logger binding

Lagrange Release v6.15.0

Core Module

• Added support for blocker elements in compute_components. Deprecated compute_bordered_components.h
• Improved performance of is_vertex_manifold.
• Added new DisjointSetsWithSize class for union-find

Python Bindings

• Added support for copy of SurfaceMesh: .__copy__, .__deepcopy__, and .clone methods.

Lagrange Release v6.14.0

Core Module

• SurfaceMesh updates
  • Allow polygonal facets of size 1 or 2
  • create_attribute_from() supports meshes with different types
  • compute_dijkstra_distance() support for SurfaceMesh

IO Module

• Fix reading glTF with multiple texcoord attributes
• Fix loading .obj with mixed/missing UV attribute information

Lagrange Release v6.13.0

Core module

• Fixes to legacy TBB 2020.3
  • Incorrect aligned memory allocation code
  • Fix symbol export for macOS universal builds
• Surface mesh support (and python binding, benchmark, etc.) added to:
  • permute_facets
  • detect_degenerate_facets
  • remove_null_facets
  • remove_duplicate_facets

Lagrange Release v6.12.0

Infrastructure

• Improve CMake target folder setting coverage.
• Improve C++20 MSVC compatibility.

Core

• Fixed sub-mesh extraction for 2D meshes.
• Replace chain_edges and chain_edges_into_simple_loops with chain_directed_edges and chain_undirected_edges.
• Added SurfaceMesh support for topology computation, including compute_euler, is_vertex_manifold, is_edge_manifold, is_manifold.
• Added SurfaceMesh support for extract_boundary_loops.

IO Module

• Added support for saving 2D meshes in .msh format.

Python

• Minor fix for SurfaceMesh.get_edge_vertices.

Lagrange Release v6.11.0

Infrastructure

• Migrate from FetchContent to CPM for dependency retrieval
• Update Catch2 to v3.2.1
• Remove unused testing data
• Cleanup attribute folder
• Minor compilation fix in IO and UI modules
• Add github actions to build and deploy open-source wheel. The open-source Lagrange python package can be installed via:

  pip install lagrange-open
  

Core module

• SurfaceMesh support:
  • Implemented shrink_to_fit() method for SurfaceMesh and Attribute classes
  • Add SurfaceMesh support for remove_isolated_vertices()
  • Add SurfaceMesh support for compute_dihedral_angle() and compute_edge_lengths()
  • Add SurfaceMesh support for weld_indexed_attribute()
    • Deprecate condense_indexed_attribute()
    • Deprecate unify_corner_indices()

IO module

• Add automatic file format detection in load/save from stream
• Refactor glTF loader to load attributes in their native type
• Remove normalization when saving color attributes in PLY format
• Avoid hard coded types when saving PLY mesh

Python module

• Open-source package lagrange-open now installable via pip
• Connected the Lagrange logger with the Python logging module. It is now possible to set the Lagrange log level via Python.
• Added mesh_to_string and string_to_mesh function to save/load a mesh to memory.
• Improve python binding of SurfaceMesh.create_attribute to accept Numpy dtype and not require initial values.
• Added automatic stub file generation, providing autocompletion in IDE like Visual Studio Code, and enabling static type analysis via MyPy.