CM2 MeshTools® Suite /release 4.9.0

• Lib names suffix is _49 for this series.
• New Visual Studio 2019 builds (Win32/64).
• New GCC 7 and GCC 8 builds (Linux32/64).
• Visual Studio < 2010 and GCC < 4.8 are no longer supported (minimum versions raised to Visual Studio 2010 and GCC 4.8).
• The Visual Studio 2019 builds target Windows 7 or later. Windows XP is still supported for the Visual Studio builds ≤ 2017 but deprecated.
• macOS < 10.9 is no longer supported (minimum deployment target raised to 10.9 Mavericks).

CM2 Intersect T3

• New settings.fix_flag (default = true) to allow for dry-run of the intersector when unset (false) and to only report pathologies without attempting to fix them.

CM2 SurfMesh T3, CM2 SurfMesh Q4 (still experimental)

• Now able to mesh directly from a TopoDS_Shape.
• Upgraded to OpenCascade(R) 7.3.0.

Miscellaneous

• meshtools2d::interpolate now works with all-quad and mixed meshes (used to work only with all-triangle meshes).
• meshtools2d::interpolate_metrics now works with all-quad and mixed meshes (used to work only with all-triangle meshes).
• meshtools3d::duplicate_surface_nodes generalizes the former meshtools3d::duplicate_surface_nodes_TH4 to H8 and mixed solid meshes.
• Port to Visual Studio 2019, GCC 7, GCC 8.

CM2 SurfRemesh T3, CM2 SurfRemesh Q4

• Proximity detection between skeleton lines leading to finer and better meshes near small geometric features (ridges, fillets, holes…)
  This tends however to generate more elements. To mitigate this, use settings.target_h (set for instance target_h = max_h).
• Massive speed-ups for some terrain-like surfaces.
• User-defined mesh sizes better taken into account.
• Speed-ups with frozen triangles.

CM2 TetraMesh Iso, CM2 TetraMesh Aniso

• Enforcement of hard constraints fortified further (and sometimes much faster).
• Better minimum shape quality on difficult cases.
• In CONVEX_HULL_MODE, optimisations (local-remeshings only) are now performed in accordance with settings.optim_level (none was performed before).

CM2 Intersect T3

• Much fewer remaining pathologies on difficult cases.
• Significant speed-ups.

CM2 HexaMesh Iso

• Fewer missing wall-quads when settings.make_conformal_flag = false.

All meshers

• Crash in convex-hull mode when nodes were aligned.

CM2 TriaMesh Iso, CM2 TriaMesh Aniso, CM2 TetraMesh Iso, CM2 TetraMesh Aniso

• settings.node_smoothing_flag didn’t work in REGULARIZE_MODE.

CM2 TriaMesh Iso, CM2 TriaMesh Aniso, CM2 QuadMesh Iso, CM2 QuadMesh Aniso

• Fix in convex-hull mode when settings.strict_constraints_flag = true.
  The convex-hull wasn’t always exact, i.e. some (small) concavities could have been left.

CM2 SurfRemesh T3, CM2 SurfRemesh Q4

• Metrics on user-defined hard nodes were poorly taken into account (when close to some skeleton lines).
• Skeleton lines poorly remeshed sometimes.
• settings.node_smoothing_flag didn’t work with settings.refine_flag = false.
• Some initial elements could be uncolored in data_type::colors_in.
• Nodes sometimes not on the initial surface with spurious chordal error.

CM2 QuadMesh Iso, CM2 QuadMesh Aniso, CM2 SurfMesh Q4, CM2 SurfRemesh Q4

• In all-quad mode, could fail on a simple one-quad mesh.
• settings_type::min_Q4_angle_quality didn’t work as expected.

CM2 HexaMesh Iso

• CM2_INTERNAL_ERROR (Wall-triangle missing) sometimes.
• Uninitialized-read fixed.

Miscellaneous

• meshtools1d::metrics_gen_aniso3d: bug when hb < 0.
• Fixes in meshtools::NASTRAN_input and meshtools::FEMAP_input.
• Fix in meshtools2d::mesh_surface_param with target_metric and embedded hard nodes (isolated_nodes).
• Doc fixes and clarifications.

CM2 SurfRemesh T3, CM2 SurfRemesh Q4

• Many changes especially in the mesh-partitioning algorithm and new proximity detection between skeleton lines.
  The latter tends however to generate more elements with default setting of target_h = 0.
  To mitigate this, set settings.target_h to a realistic mesh size (such as for instance target_h = max_h).

Miscellaneous

• meshtools3d::duplicate_surface_nodes_TH4 replaced with meshtools3d::duplicate_surface_nodes (now generalized to H8 and mixed solid meshes).
• Now built on Windows with UNICODE encoding setting (used to be MBCS).
  This may impact functions taking a filename as argument (such meshtools::NASTRAN_input, meshtools::NASTRAN_output and siblings).