[vtkusers] Generate 2D views (store them as images) from 3D models

[Aitor Aldomà]

Hi again,

thanks for your answer Seb. Offscreen rendering was the keywords I was
missing for a successfull search.
Anyway, I have been reading other posts about this topic and realized that
rendering with OSMesa will be slower as is not hardware accelerated, is that
true?. As I intend to use the Offscreen rendering for batch processing, I
really need the rendering to be fast... I am using Linux with Nvidia Card...
Any other ideas?

Thanks

On Wed, Jul 7, 2010 at 1:58 PM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> Hi  Aitor,
>
> The only way to prevent the window from poping up, is to use the
> Offscreen option and compile vtk with OSMesa.
> Otherwise, even in Offscreen mode, a black window will popup and disappear.
>
> Seb
>
> On Wed, Jul 7, 2010 at 7:36 AM, Aitor Aldomà <aldoma.aitor at gmail.com>
> wrote:
> > Hi everybody,
> >
> > I want to generate 2D views of a 3D model and save them as jpeg image. At
> > the moment, I am using vtkWindowToImageFilter to obtain the generated
> view
> > from a RenderWindow. The problem is that I dont want to display the
> window
> > on the screen, just wan the RenderWindow to render the view and store the
> > result with vtkWindow without showing the window.
> >
> > This is part of the code i am using now, the problem is that the window
> will
> > flash for a short time and then disapper. Is there a way to render the
> view
> > without being displayed on the screen???
> >
> > renWin = vtk.vtkRenderWindow()
> > renWin.AddRenderer(ren)
> > ren.SetBackground(1, 1, 1)
> > renWin.SetSize(128,128)
> >
> > ren.Render()
> >
> > winToImageFilter = vtk.vtkWindowToImageFilter()
> > winToImageFilter.SetInput(renWin);
> >
> > renWin.Finalize()
> > winToImageFilter.Update()
> >
> > jw = vtk.vtkJPEGWriter();
> > jw.SetInput(winToImageFilter.GetOutput());
> >
> > jw.SetFileName(fileName + ".jpg");
> > jw.Write();
> >
> > Thanks in advance
> >
> >
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