Member pfc::DiscreteField< T, D >::interpolate (const std::array< double, D > &coordinates): Use pfc::interpolate(field, coords) free function instead. This member function is deprecated and will be removed in v2.0. The free function version provides better consistency with OpenPFC's design philosophy and enables ADL-based extension.
Member pfc::world::create (const Int3 &size, const Real3 &offset, const Real3 &spacing): Use create(GridSize, PhysicalOrigin, GridSpacing) for type safety. This overload is ambiguous - it's unclear which Real3 is offset vs spacing. The strong-type API prevents parameter confusion at compile time.