Format support

Gmsh (.msh)

Reader

• Supported: legacy MSH 2.2 geometry/connectivity.

• Not supported: field import.

Writer

• meshRW.msh: legacy writer.

• meshRW.msh2: uses Gmsh API and can target additional MSH versions via options.

VTK (.vtk, .vtu, .pvd)

Legacy VTK

• meshRW.vtk writes ASCII legacy .vtk output.

XML VTK

• meshRW.vtk2 writes .vtu and transient .pvd index files.

• For transient fields, per-step files are emitted with numbered suffixes.

Known constraints

• Input/output dictionaries must include consistent dimensions and entity counts.

• Some advanced cell/field combinations depend on the backend (vtk vs vtk2).

• Large transient exports can generate many files; plan output folder organization accordingly.