[vtk-developers] Stereo on vtkRenderWindow::StereoRenderComplete resize problem

[Aashish Chaudhary]

On Thu, Jan 23, 2014 at 7:58 AM, Marco Lopes <marco.lop3s at gmail.com> wrote:

> Hi,
>
>
>
> I'm adding a new stereo option for VTK/Paraview and as I'm new to both, I
> was a bit surprised when I saw how the merging is being doing.
>
>
>
> In the first place I don't understand why it's done using the CPU when the
> whole VTK is based on OpenGL rendering, perhaps it's QT related?
>

What stereo method you are using? Some of them are directly performed on
the GPU and some CPU (We have to do that for Checkerboard, Split horizontal
etc).

>
> So, the reason why I mention it is that I guess this is the reason why I'm
> experiencing problems.
>
>
>
> I'm developing under Windows VS2010 and I've implemented the new mode for
> an auto stereoscopic display and this mode is based on sub-pixel
> multiplexing the image. Everything looks fine on the implementation as it
> was quite straightforward.
>
>
>
> However when I've tested it, I’ve noticed that the resizing the window
> causes the result to interpolate and of course it destroys completely the
> stereo format I want to use. I also noticed that further resizing the
> window causes the whole application Paraview to crash.
>
>
>
> I thought first I've made a mistake and then I've tried to use the
> interlaced mode but it crashes as well.
>
>
>
> As long the window is not resized, interlaced mode seems to work well
> which is strange for me as the interpolation should destroy this stereo
> mode as well.
>

I see. This is strange. I have never seen this issue before.

>
>
> Am I missing a setting on VTK that will cause the renders to re-render to
> the exact window size?
>

This is ParaView?

>
> Is it possible to move this function under vtkOpenGLRenderWindow and do
> the whole mixing in shader language ?
>

You can do that but then it won't work on older systems most likely.

>
>
> Any help appreciated.
>
>
>  -Marco
>
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-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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