Yeah, I noticed that comment, but since it says the callback is only
*triggered* by the BBoxKnob and he's dealing with a Box3 knob, I assumed
that was some out-of-date documentation. Sounds like a support email is in
order one way or the other though...
-Nathan
-----Original Message-----
From: Ben Dickson
Sent: Wednesday, May 15, 2013 11:09 PM
To: Nuke plug-in development discussion
Subject: Re: [Nuke-dev] knob_change_finished unexpected behaviour
withBox3_knob
I'm pretty sure the knob_change_finished is only implemented for certain
knobs:
grep -B2 knob_change_finished include/DDImage/Op.h
// currently only triggered by the BBoxKnob but more will be supported
in future.
// Derived classes must return non-zero from this method if they want it
to be called on that knob again.
virtual int knob_change_finished(Knob* knob, bool changedByUser =
true){return 0;}
On 16/05/13 15:25, Nathan Rusch wrote:
Information seems to be somewhat scarce, but based on the description of
knob_change_finished, it sounds a bit like the knob (or the callback)
isn’t functioning properly in that respect.
-Nathan
*From:* Ivan Busquets <mailto:ivanbusqu...@gmail.com>
*Sent:* Monday, May 13, 2013 12:38 AM
*To:* Nuke plug-in development discussion
<mailto:nuke-dev@support.thefoundry.co.uk>
*Subject:* [Nuke-dev] knob_change_finished unexpected behaviour with
Box3_knob
Hi,
I'm trying to prevent a Box3 knob from changin the hash (and triggering
a re-render) while the user is dragging around the 3D handles, and only
do so once the handle is released.
My plan was to set/unset a NO_RERENDER flag to the knob, and force the
update only when knob_change_finished() is called.
However, knob_change_finished() is called just as frequently as
knob_changed() on a Box3 knob. As in, it is called while dragging the 3D
handles.
Before I send an email to support, I thought I'd fish for some
tips/advice here.
Are there any other strategies I could use to achieve this? The goal is
to have a Box3 behave like a Transform2D node (no processing done while
dragging the widget/handle in the viewer)
Thanks in advance,
Ivan
------------------------------------------------------------------------
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--
ben dickson
2D TD | ben.dick...@rsp.com.au
rising sun pictures | www.rsp.com.au
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