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CHANGELOG.md

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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.

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.