[PD-dev] Fwd: Synchronizing OpenGL with libpd (with RtAudio or Port Audio)

[Dan Wilcox]

It looks like you’re using the C++ wrapper for libpd. Did you build it with thread support and/or are you using the queued layer?

There are actually 3 threads here:

* main application thread
* audio thread
* Open GL thread

libpd will obviously be utilized by the audio thread where you run the libpd process function. If you are *not* using a mutex or the queued layer, you may have resource issues between the audio thread and the other threads.

--------
Dan Wilcox
@danomatika <https://twitter.com/danomatika>
danomatika.com <http://danomatika.com/>
robotcowboy.com <http://robotcowboy.com/>
> On Feb 17, 2016, at 4:00 AM, pd-dev-request at lists.iem.at wrote:
> 
> From: 0222445 <Luis.Valdivia at stud.sbg.ac.at <mailto:Luis.Valdivia at stud.sbg.ac.at>>
> Subject: [PD-dev] Fwd: Synchronizing OpenGL with libpd (with RtAudio or Port Audio)
> Date: February 16, 2016 at 9:00:30 PM MST
> To: pd-dev at lists.iem.at <mailto:pd-dev at lists.iem.at>
> 
> 
> I have to synchonize a Metronome (wrote with libpd) and OpenGL graphics. I'd like to move some objects parallel with the metronome clicks.
> The language is C++, the Gui is made with WxWidgets, Threads with Poco, audio with RtAudio.
> The metronome works, OpenGL graphics too, I have only a problem with the synchronisation. I'm running both things with a Thread, but it actually doesn't works, the metronome run and the graphic is done after the metronome stops (and not parallel). i become  the CGLError 10004 from OpenGL during the execution of the thread (if CLGError is = 0 the draw is going to be done). The object is moved when the thread is completed.

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