Sample PyVista code

[rjleveque]

I added a pyvista branch to visclaw that has a directory dev_pyvista with some sample code using the PyVista visualization package. This seems particularly useful for

• GeoClaw plots of topography and water surface as 3D surfaces rather than just 2D planview plots
• GeoClaw plots on the sphere
• AMRClaw plots of 3D results.

I have not yet experimented much with 3D, but it seems promising for plotting AMR results in various ways.

See https://depts.washington.edu/clawpack/dev_pyvista/ for some sample plots created with code in this directory. Suggestions and exploration of addtional capabilities welcome!