[vtkusers] vtk can render 3d image realtime?

[LuanKuan]

Hi, David
Sorry, I can not comprehend the work mechanism of vtk. I modified my code as you mentioned in reply, but it doesn't work. 
My code is as fellows:
 
 vtkRenderer *aRenderer = vtkRenderer::New();
 vtkRenderWindow *renWin = vtkRenderWindow::New();
 renWin->AddRenderer(aRenderer);
 vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
 iren->SetRenderWindow(renWin);
 
 vtkContourFilter *contours = vtkContourFilter::New();
 vtkPolyDataMapper *contmap = vtkPolyDataMapper::New();
 vtkActor *contact = vtkActor::New();
 
 vtkCamera *aCamera = vtkCamera::New();
 aCamera->ParallelProjectionOn();
 aRenderer->SetActiveCamera(aCamera);
 aRenderer->ResetCamera();
 aRenderer->SetBackground(0.725,0.725,1);
 renWin->SetSize(1024, 768);
 aRenderer->ResetCameraClippingRange ();
 iren->Initialize();

// loop 
for (int i=iFirstFrame; i<iNumFrames; i++)
{
  ......
  interpolate bmpimage into volumeimage;
  ......
  volumeimage->update();
  contours->SetInput(volumeimage);
  contours->SetValue(0,gval);
  contmap->SetInput(contours->GetOutput());
  contmap->SetScalarRange(100,220);
  contact->SetMapper(contmap);
  aRenderer->AddActor(contact);
  aRenderer->Render();
  iren->Render();
}
iren->Start();
 
thank you.

 
> Date: Fri, 5 Nov 2010 07:48:09 -0400
> From: daviddoria at gmail.com
> To: luannauk at gmail.com
> CC: vtkusers at vtk.org
> Subject: Re: [vtkusers] vtk can render 3d image realtime?
> 
> On Fri, Nov 5, 2010 at 6:33 AM, kuan luan <luannauk at gmail.com> wrote:
> > Dear all,
> > I am a vtk beginner. I am trying to reconstruct a 3d medical image from 2d
> > images with spacial coordinates. I use vtk for reconstructing and surface
> > rendering.
> > now, I have a program for 3d reconstruction from 2d images offline.
> > My method is
> >   acquire a new 2d image with spacial coordiante,
> >   interpolate it into 3d vtkimage.
> >   render the 3d vtkimage with new 2d image added,
> >   a new vtkRenderWindow is created.
> > all procedure run in a while loop.
> >
> > But, I want to implement it in realtime.
> > My problem is I can not render 3d reconstructed image with vtk in realtime.
> > How can the 3d vtkimage be rendered again in the same vtkRenderWindow
> > without creating a new one?  Is this possible using VTK?  If so please tell
> > me how to do it.
> >
> > I'm using VTK5.4 and Microsoft Visual C++ 2008.
> > Any advice is appreciated ;)
> > Thank you in advance.
> 
> Sure, just create the vtkRenderWindow and vtkRenderer outside (before)
> the loop. Then inside the loop just add your new data to the renderer
> and call Render() on the renderer and renderWindow.
> 
> David
> _______________________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
> 
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> 
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20101108/58c55c24/attachment.htm>