[vtkusers] vtkPlaybackWidget doesn't "play"

[Gerrick Bivins]

Perfect!!!!

Thanks.

Gerrick

 

From: David Cole [mailto:david.cole at kitware.com] 
Sent: Tuesday, December 02, 2008 10:15 AM
To: Gerrick Bivins
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] vtkPlaybackWidget doesn't "play"

 

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
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