[vtkusers] parallel rendering

[Lisa S. Avila]

Hello Miguel,

You may want to wait a week or two - vtkVolumeRayCastMapper is being 
modified to encapsulate the functionality found in vtkRayCaster, and 
vtkRayCaster will be disappearing before VTK 4.0.

Lisa


At 06:20 AM 7/24/2001, Miguel Angel Martin Fernandez wrote:
>Hello vtkusers!
>
>I am trying to make a parallel version of ray-casting, using MPI. The
>approach i've been thinking of is to divide the image into rows of pixels,
>so that each machine must render only a subset of the rows. The only place
>i've found where i can do this is in vtkRayCaster, because there is a loop
>that traverses the whole image, casting rays from each pixel. Is this a
>reasonable approach?
>
>However, an instance of vtkRayCaster is automatically generated by
>vtkRenderer, and so i haven't been able to write a different class, that
>implements a parallel version of vtkRayCaster. Instead, i think i must
>change vtkRayCaster itself. Is this right?
>
>Finally, if i want to run this on a cluster, i believe that
>vtkRenderWindow and vtkRenderWindowInteractor only make sense on one of
>the processes (the one that will put it all together). However, i can't
>find the way to make the rest of the processes execute their
>pipelines... does it make sense to write
>
>                           renderer->Render();
>
>without having a renderWindow associated with the renderer??
>
>My idea was to have MPI encapsulated in vtkRayCaster so that, once a
>process computes its part of the image, it sends it to process "zero".
>
>Any ideas will be welcome...
>
>         Thank you very much in advance!
>
>
>
>--
>             ________________________________________________________
>   _________(_ 
> _)_________
>   \········(_   Miguel Ángel Martín 
> Fernández                      _)········/
>    \·······(_   ETSI Telecomunicación, Universidad de Valladolid   _)·······/
>     \······(_   Campus Miguel Delibes, Camino del Cementerio, s/n  _)······/
>      )·····(_   e-mail: miguel at atenea.tel.uva.es                   _)·····(
>     /······(_   Tfno: +34-983-423000 Ext. 25548                    _)······\
>    /·······(________________________________________________________)·······\
>   /__________) 
> (_____________\
>
>
>
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