Take a look at my example of this on Nukepedia:
http://www.nukepedia.com/gizmos/plugins/other/dynamicknobs/
Caveat: I haven't tested this under 6.3, only in 6.2...
-jonathan
On Feb 14, 2012, at 12:01 AM, Chishing Yip wrote:
> Hi all,
>
> I have a plugin uses replace_knobs() to create knobs dynamically:
>
> replace_knobs( knob( "my_knob" ), num_of_dyn_knobs, (
> &createKnobsCallback ) )
>
> Nuke crashes when replace_knobs() returns, even the createKnobsCallback()
> does nothing:
> void createKnobsCallback( ... )
> {
> /// nothing to do
> return;
> }
>
> here is the stack trace:
> #1 0x000000000068447c in ?? ()
> #2 0x00007ffff73135eb in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaac08, n=2)
> at msort.c:84
> #3 0x00007ffff7313458 in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaabf8, n=4)
> at msort.c:55
> #4 0x00007ffff7313448 in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaabf8, n=9)
> at msort.c:54
> #5 0x00007ffff7313458 in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaabb8,
> n=17) at msort.c:55
> #6 0x00007ffff7313458 in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaab30,
> n=34) at msort.c:55
> #7 0x00007ffff7313448 in msort_with_tmp (p=0x7fffffff9f30, b=0x6aaab30,
> n=69) at msort.c:54
> #8 0x00007ffff73139f0 in qsort_r (b=0x6aaab30, n=69, s=<value optimized
> out>, cmp=0x684468, arg=0x0) at msort.c:298
> #9 0x0000000000683a88 in ?? ()
> #10 0x0000000000683792 in ?? ()
> #11 0x00000000006833a2 in ?? ()
> #12 0x00007ffff7b39deb in DD::Image::Op::replace_knobs(DD::Image::Knob*, int,
> void (*)(void*, DD::Image::Knob_Closure&), void*) ()
> from /usr/local/Nuke6.3v6/libDDImage.so
>
> If I use the knob pointer instead:
> Knob* myKnob = knob( "my_knob" );
> replace_knobs( myKnob, num_of_dyn_knobs, ( &createKnobsCallback ) )
>
> then the former crash is gone, but Nuke still crashes when calling
> Knob::set_value() or Knob::set_text() during replace_knobs():
> void createKnobsCallback( ... )
> {
> ...
> myFloatKnob->set_value( 1.0 ); /// crashes
> myStringKnob->set_text( "abc" ); /// crashes
> ...
> }
>
> Stack trace:
> #0 0x0000000180000293 in ?? ()
> #1 0x00007fffdc8b62e0 in DD::Image::Knob::set_text (this=0x4a54ff0,
> v=0xb0c2ea8 "abc")
> at /usr/local/Nuke6.3v6/include/DDImage/Knob.h:536
> #2 0x00007fffdc8b2404 in MyPlugin::createKnobsCallback (this=0x4abef60,
> f=...)
> at MyPlugin.cpp:2087
> #3 0x00007fffdc8b28db in MyPlugin::createKnobsCallback (p=0x4abef60, f=...)
> at MyPlugin.cpp:2387
> #4 0x0000000000b81727 in ?? ()
> #5 0x0000000000b8151a in ?? ()
> #6 0x00007ffff7813c92 in DD::Image::Op::replace_knobs(DD::Image::Knob*, int,
> void (*)(void*, DD::Image::Knob_Closure&), void*, char const*) ()
> from /usr/local/Nuke6.3v6/libDDImage.so
>
> Is there anything I should be aware to?
> Thanks a lot,
> Shing
>
>
> _______________________________________________
> Nuke-dev mailing list
> [email protected], http://forums.thefoundry.co.uk/
> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-dev
_______________________________________________
Nuke-dev mailing list
[email protected], http://forums.thefoundry.co.uk/
http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-dev
