Expose stream commands

[justinlaughlin]

As far as I'm aware, only "keys" can be sent through PyGLVis but not "stream commands". Adding in some API calls for this (may require work in glvis-js) would make pyglvis much more customizable.

[tzanio]

You should be able to add other commands besides keys in the stream.

For example the MFEM logo stream has valuerange -3 2 at the end.

So in PyGLVis you should be able to e.g. say glvis(to_stream(mesh,x) + 'valuerange -3 2').

Does this not work?

[justinlaughlin]

Unfortunately, valuerange is the only other command that works - glvis-js has different machinery for handling the stream (glvis/lib/aux_js.cpp/display). In particular, see these lines. As an example, you can add zoom 50 at the end of a .saved file and open it with glvis vs glvis-js.

In hindsight, this probably should be an issue under glvis, since aux_js.cpp is what needs to change.

[tzanio]

Oh, I see now. You are correct