... before, it was used only, when `if animate`. Now, it used in any case of the call `plotter.show`.

pyvista\plotting\plotting.py:4882: On Windows OS "in the event that the user hits
the exit-button on the GUI then it must be finalized and deleted as accessing it
will kill the kernel... proper screenshots cannot be saved if this happens"
Therefore, when you used ´_plot_point_scalars(..., screenshot=...)´, you got at
ansys\mapdl\reader\rst.py:2830:
´RuntimeError: This plotter is closed and unable to save a screenshot.´

The only solution is, to pass the ´screenshot´ argument to ´plotter.show´
as done in this patch.

... the old version would break with version 1.0.0.
I used the same compare operation as in
<https://github.com/rbarrois/python-semanticversion/blob/master/semantic_version/base.py>
tested manually.

…directly using `offset` for next cell offset

- Therefore the function `cell_lookup`, which was limited to 3D cells, is no longer necessary.
- Now, all cell types are supported, while the functions has even been simplified.
- Now, the functions do not need the parameter `celltypes` any more. Since they are only used in rst.py in the private method `Result._extract_node_components`, I took the liberty to remove the parameter A in the respective definition und the respective call.

Remark: Only tested with a pure python version of the functions, please test the cython function of the commit!

…lls`

When you called `AnsysFile.close()` you got at line 255

   'ansys.mapdl.reader._binary_reader.AnsysFile' object has no attribute '_file_out'

as `_file_out` is never created (this line is the only occurrence).

… 0.32.dev0

The actual development version is 0.32.dev0: `pv._version.version_info = (0, 32, "dev0")`. There, the string `"dev0"` can not be compared with `0`, so that comparison failed for this version. To solve this, I removed the last element on the right-hand side expression of the comparison. The new comparison `(0, 32, "dev0") > (0, 32)` works now as expected. Tested manually.