Comments on: Visual Effects Pipeline Projects and Interapplication Communication With Maya http://eddieoffermann.com/blog/2009/03/07/71/ The reel, resume and contact resource for Eddie Offermann, Pipeline TD, Visual Effects Scripter, CG VFX and Integration Artist Tue, 09 Mar 2010 22:39:41 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Eddie http://eddieoffermann.com/blog/2009/03/07/71/comment-page-1/#comment-106 Eddie Tue, 09 Mar 2010 22:39:41 +0000 http://eddieoffermann.com/blog/?p=71#comment-106 A 4-day weekend in New Orleans had my mind a little foggy when I received your comment last night, but it occurred to me today that this is the same behavior (and probably for the same reasons) as a scriptJob. commandPort functionality is much like a scriptJob - while we may monitor particular attributes or changes in the maya environment and execute a script in response to them, the time in which we may execute those scripts is limited. Similar to the problem that you're having with commandPort, scriptJob will not process what are basically attribute-based interrupts during playback because to do so would substantially degrade playback performance. The system overhead required to check various conditions, listen for network signals, etc is too much of a (usually unnecessary) burden. Or at least... that was the case when these commands were initially implemented. Nowadays, I'd say the system overhead for such would be negligible: but the limitations remain. A 4-day weekend in New Orleans had my mind a little foggy when I received your comment last night, but it occurred to me today that this is the same behavior (and probably for the same reasons) as a scriptJob.

commandPort functionality is much like a scriptJob – while we may monitor particular attributes or changes in the maya environment and execute a script in response to them, the time in which we may execute those scripts is limited.

Similar to the problem that you’re having with commandPort, scriptJob will not process what are basically attribute-based interrupts during playback because to do so would substantially degrade playback performance. The system overhead required to check various conditions, listen for network signals, etc is too much of a (usually unnecessary) burden.

Or at least… that was the case when these commands were initially implemented. Nowadays, I’d say the system overhead for such would be negligible: but the limitations remain.

]]> By: Eddie http://eddieoffermann.com/blog/2009/03/07/71/comment-page-1/#comment-105 Eddie Tue, 09 Mar 2010 00:41:43 +0000 http://eddieoffermann.com/blog/?p=71#comment-105 What platform are you working on? I haven't encountered this problem: but I haven't tried to send signals during playback either. commandPort has some quirks though: the inability to receive port signals to more than one instance of Maya and the related issue of occasionally not having the port surrendered by a terminated Maya instance, requiring a reboot are my biggest issues that rear their heads on a regular basis. What platform are you working on?

I haven’t encountered this problem: but I haven’t tried to send signals during playback either.

commandPort has some quirks though: the inability to receive port signals to more than one instance of Maya and the related issue of occasionally not having the port surrendered by a terminated Maya instance, requiring a reboot are my biggest issues that rear their heads on a regular basis.

]]> By: jeremy http://eddieoffermann.com/blog/2009/03/07/71/comment-page-1/#comment-104 jeremy Mon, 08 Mar 2010 19:10:36 +0000 http://eddieoffermann.com/blog/?p=71#comment-104 I've been using commandPort a bit and one thing I've found to be slightly problematic is that I cannot issue commands during playback - even if I want to issue a play -state 0 command. Do you know if there is something I'm missing? I’ve been using commandPort a bit and one thing I’ve found to be slightly problematic is that I cannot issue commands during playback – even if I want to issue a play -state 0 command. Do you know if there is something I’m missing?

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