CHANGELOG.md

Changelog

This document only describes breaking changes in meshio. If you are interested in bug fixes, enhancements etc., best follow the meshio project on GitHub.

v5.1.0 (Dec 11, 2021)

• CellBlocks are no longer tuples, but classes. You can no longer iterate over them like

  for cell_type, cell_data in cells:
      pass

  Instead, use

  for cell_block in cells:
      cell_block.type
      cell_block.data

v5.0.0 (Aug 06, 2021)

• meshio now only provides one command-line tool, meshio, with subcommands like info, convert, etc. This replaces the former meshio-info, meshio-convert etc.

v4.4.0 (Apr 29, 2021)

• Polygons are now stored as "polygon" cell blocks, not "polygonN" (where N is the number of nodes per polygon). One can simply retrieve the number of points via cellblock.data.shape[1].

v4.0.0 (Feb 18, 2020)

• mesh.cells used to be a dictionary of the form

  {
    "triangle": [[0, 1, 2], [0, 2, 3]],
    "quad": [[0, 7, 1, 10], ...]
  }

  From 4.0.0 on, mesh.cells is a list of tuples,

  [
    ("triangle", [[0, 1, 2], [0, 2, 3]]),
    ("quad", [[0, 7, 1, 10], ...])
  ]

  This has the advantage that multiple blocks of the same cell type can be accounted for. Also, cell ordering can be preserved.

  You can now use the method mesh.get_cells_type("triangle") to get all cells of "triangle" type, or use mesh.cells_dict to build the old dictionary structure.

• mesh.cell_data used to be a dictionary of the form

  {
    "triangle": {"a": [0.5, 1.3], "b": [2.17, 41.3]},
    "quad": {"a": [1.1, -0.3, ...], "b": [3.14, 1.61, ...]},
  }

  From 4.0.0 on, mesh.cell_data is a dictionary of lists,

  {
    "a": [[0.5, 1.3], [1.1, -0.3, ...]],
    "b": [[2.17, 41.3], [3.14, 1.61, ...]],
  }

  Each data list, e.g., mesh.cell_data["a"], can be zipped with mesh.cells.

  An old-style cell_data dictionary can be retrieved via mesh.cell_data_dict.