Use the (Tcl) event loop. If you run the interface in a separate process, then you have chimera's event loop invoke a callback when there is data to be read on the socket connecting the two processes. That is what's done to implement the --send command line option. See DBPuppet/tcl_sockets.py for details.

An alternative would be to use threads where the queue is checked every frame. See ReadStdin/__init__.py for details there.

HTH,

Greg

On 2/4/2016 2:37 PM, Dougherty, Matthew T wrote:

I am working on a human interface for volume rendering.

The livid ds1 mixer uses midi through USB.

http://lividinstruments.com/products/ds1/

I should be able to use python midi libraries for access.

This leads to the problem of the midi implementation, and a question as to a similar implementation for chimera2.

One implementation would insert into the event loop, another approach could be tied to a frame/trigger callback.

Any suggestions?

Matthew Dougherty
National Center for Macromolecular Imaging
Baylor College of Medicine
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