[vtkusers] vtkPlaybackWidget doesn't "play"

[David Cole]

You need to call vtkRenderWindow::Render after each change to force a render
before the animation continues... Otherwise, there will just be a pending
paint message waiting to be processed when your animation is over and you
are again allowing the message loop to process paint messages.
Call vtkRenderWindow::Render, not vtkRenderer::Render...

HTH,
David


On Tue, Dec 2, 2008 at 11:10 AM, Gerrick Bivins <gbivins at objectreservoir.com
> wrote:

>  Hi David,
>
> I've tried calling Render via
> vtkPlaybackRepresenation::GetRenderer()->Render() but that had no effect.
>
>
>
> I've subclassed vtkPlaybackRepresentation and overridden Play as follows:
>
>
>
>      virtual void Play()
>
>      {
>
>         _playing = true;
>
>         //this->_playThread.join();
>
>         this->PlayThread();
>
>
>
>      }
>
>
>
> With PlayThread() as follows (which I'd like eventually move functionality
> into a thread so I can pause it):
>
>       void PlayThread()
>
>       {
>
>         while(_currentFrame < NumberOfFrames && _playing)
>
>         {
>
>
> //this->_pbw->InvokeEvent(vtkCommand::LeftButtonPressEvent,NULL);
>
>               std::cout<<_currentFrame<<std::endl;
>
>               this->UpdateCurrentFrame(1);
>
>               this->GetRenderer()->Render();
>
>         }
>
>       }
>
>
>
> UpdateCurrentFrame calculates the next frame depending on direction and
> triggers the pipeline update.
>
>
>
> Gerrick
>
>
>
> *From:* David Cole [mailto:david.cole at kitware.com]
> *Sent:* Tuesday, December 02, 2008 9:48 AM
> *To:* Gerrick Bivins
> *Cc:* vtkusers at vtk.org
> *Subject:* Re: [vtkusers] vtkPlaybackWidget doesn't "play"
>
>
>
> Are you calling Render from your play callback after each step of the
> animation...?
>
>
>
> On Tue, Dec 2, 2008 at 10:33 AM, Gerrick Bivins <
> gbivins at objectreservoir.com> wrote:
>
>
> Hello,
> I'm trying to use the vtkPlaybackWidget to control an animation sequence.
> All the actions work as expected except for the "play" button.  I've
> overridden the Play callback function to loop over my animation and update
> for each step but the render window is only updated at the end of sequence.
> Using the "Forward" and "Backward" step buttons work as expected. Does
> anyone have any suggestions on how to get the render to update using the
> "Play" button?
> Thanks in advance,
> Gerrick
> --
> View this message in context:
> http://www.nabble.com/vtkPlaybackWidget-doesn%27t-%22play%22-tp20794191p20794191.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
>
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