README.md
In natcpp: Fast C++ Primitives for the 'NeuroAnatomy Toolbox'

Vendored third-party source

libigl (`igl/`)

A minimal subset of libigl providing igl::fast_winding_number (the "Fast Winding Numbers for Soups and Clouds" method of Barill et al. 2018), used as the accelerated back end for the point-in-mesh test.

Upstream: https://github.com/libigl/libigl
Commit: 7100764 (branch main)
Licence: MPL-2.0 (see igl/LICENSE.MPL2), which is compatible with this package's GPL (>= 3).

Only the transitive include closure of igl/fast_winding_number.h is vendored (10 files). The bulk is FastWindingNumberForSoups.h, the self-contained HDK solid-angle BVH implementation; it depends only on Eigen (provided here via RcppEigen). No CGAL, Boost, GMP, MPFR or TBB is required or compiled (the tbb/* includes in parallel_for.h are behind IGL_PARALLEL_FOR_TBB, which is not defined).

To update: shallow-clone libigl, copy the closure of igl/fast_winding_number.h (see tools//commit history for the list) plus LICENSE.MPL2, and record the new commit here.