<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Hi,<br><br><span>surely the GPU rendering mode (vtkKWEGPUVolumeRayCastMapper mapper) of the VTKEdge have some problems. I have posted two issues on February (with video), but unfortunately they still are in 'new' status. I hope that these bugs will be removed before the final release will be released (look at: <a target="_blank" href="http://public.kitware.com/Bug/view.php?id=8549">http://public.kitware.com/Bug/view.php?id=8549</a> and <a target="_blank" href="http://public.kitware.com/Bug/view.php?id=8548">http://public.kitware.com/Bug/view.php?id=8548</a> for details). In addition to the one posted, I have discovered also a problem similar to your.... that is when I try to fly inside a volume, sometimes it disappears with no reason (I think that most problems are related to the clipping
algorithm of the mapper). This is sad because the vtkKWEGPUVolumeRayCastMapper is the volume mapper of VTK/VTKEdge (in speed and quality).</span><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">I hope that someone can help...<br><br>- AGPX<br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">Da:</span></b> Loris Vosilla <loris.vosilla@gmail.com><br><b><span style="font-weight: bold;">A:</span></b> vtkusers@vtk.org; vtkedge@vtkedge.org<br><b><span style="font-weight: bold;">Inviato:</span></b> Ven 6 novembre 2009, 13:45:57<br><b><span style="font-weight: bold;">Oggetto:</span></b> [VtkEdge] Volume rendering questions<br></font><br>Dear Vtk and vtkedge users,<br><div><br></div><div>I'm using vtkKWEVolumeMapper to volume render a three dimensional blood vessel.</div><div>If I use as
rendering mode RayCastAndTexture I don't have any problem, but If I use </div>
<div>the GPURenderMode I obtain strange resuts:</div><div><br></div><div>1) When I draw the volumetrical object with a vtkcamera outside of the object self </div><div> the rendering works fine, but as soon as the camera enters in the volume I can't see </div>
<div> anything. The opacity function is properly set. This problem doesn't come if I use </div><div> RayCastAndTexture drawing method. If needed I can post screenshots of what is </div><div> happening.</div>
<div><br></div><div>2) If I want to draw two volumetrical view in two different viewports only one is drawn</div><div> using GPURenderMode.. If I use RayCastAndTexture drawing method both are drawn.</div><div><br></div>
<div>Thanks for your help</div><div>-Loris</div><div><br></div><div><br></div>
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