<p dir="ltr"><br>
---------- Vidarebefordrat meddelande ----------<br>
Från: <br>
Datum: 14 okt. 2016 6:26 em<br>
Ämne: Re: [vtk-developers] UseJitteringOn() has no effect in 7.1.0.rc1<br>
Till: Alvaro Sanchez <<a href="mailto:alvaro.sanchez@kitware.com">alvaro.sanchez@kitware.com</a>><br>
Kopia: vtkdev <<a href="mailto:vtk-developers@vtk.org">vtk-developers@vtk.org</a>></p>
<p dir="ltr">> Den 14 okt. 2016 6:01 em skrev "Alvaro Sanchez" <<a href="mailto:alvaro.sanchez@kitware.com">alvaro.sanchez@kitware.com</a>>:<br>
> ><br>
> > Indeed Elvis, pretty standard settings, I can try to reproduce it here without a specific test case. What are the volume dimensions?<br>
><br>
> Oh I'm not 100% sure I have that in my head, and I'm on the train, but I think that in the left view in my video, that is a series of stacked volumes, each roughly 100x100x1000, while the view to the right showing a selected segment is maybe 300x300x~500 (definitely 300 in two of the dimensions.</p>
<p dir="ltr">Not sure the above got through, as I was in a tunnel and mobile Gmail queued it up, so sending again...</p>
<p dir="ltr">Elvis</p>
<p dir="ltr">><br>
> Elvis<br>
><br>
> ><br>
> > On Fri, Oct 14, 2016 at 11:11 AM, Elvis Stansvik <<a href="mailto:elvis.stansvik@orexplore.com">elvis.stansvik@orexplore.com</a>> wrote:<br>
> >><br>
> >><br>
> >> Den 14 okt. 2016 3:54 em skrev "Alvaro Sanchez" <<a href="mailto:alvaro.sanchez@kitware.com">alvaro.sanchez@kitware.com</a>>:<br>
> >> ><br>
> >> > Hi Elvis,<br>
> >> ><br>
> >> > the mapper uses a vtkPerlinNoise instance to generate the jitter noise and as far as I know there are currently no knobs exposed to tweak the amount of ray perturbation. Are you using the GL2 backend? It would also be good to know what features are active along with ray jittering (multiple components, etc.), so if you could provide some sample data or code would be very helpful.<br>
> >><br>
> >> Hi Alvaro, and thanks for replying.<br>
> >><br>
> >> This is single component float data. Shading is turned off. Apart from that I think it's the default settings.<br>
> >><br>
> >> I'll try to make a minimal test case including sample data. I'm going away over the weekend. I'm bringing my laptop, but if I don't have time, you'll at least have it on Monday.<br>
> >><br>
> >> Elvis<br>
> >><br>
> >> ><br>
> >> > Thanks!<br>
> >> > Alvaro<br>
> >> ><br>
> >> > On Fri, Oct 14, 2016 at 3:47 AM, Elvis Stansvik <<a href="mailto:elvis.stansvik@orexplore.com">elvis.stansvik@orexplore.com</a>> wrote:<br>
> >> >><br>
> >> >> Hi all,<br>
> >> >><br>
> >> >> I updated our product to use VTK 7.1.0.rc1, as I was interested in<br>
> >> >> trying out vtkGPUVolumeRayCastMapper::UseJitteringOn() to get rid of<br>
> >> >> some woodgrain effects we're suffering from in our volume rendering<br>
> >> >> (mostly when the volumes are rendered very opaque).<br>
> >> >><br>
> >> >> But turning the option on seems to have little to no effect. This is<br>
> >> >> the result with the option on:<br>
> >> >><br>
> >> >> <a href="https://dl.dropboxusercontent.com/u/22350696/out.ogv">https://dl.dropboxusercontent.com/u/22350696/out.ogv</a><br>
> >> >><br>
> >> >> It looks about the same to me as it does with the option off.<br>
> >> >><br>
> >> >> Are there any knobs for this option? How does it determine how much to<br>
> >> >> perturbate the rays?<br>
> >> >><br>
> >> >> Thanks for any advise.<br>
> >> >><br>
> >> >> Elvis<br>
> >> >> _______________________________________________<br>
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> >> >><br>
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> >> >><br>
> >> >> Search the list archives at: <a href="http://markmail.org/search/?q=vtk-developers">http://markmail.org/search/?q=vtk-developers</a><br>
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> >> >><br>
> >> ><br>
> >> ><br>
> >> ><br>
> >> > -- <br>
> >> > Alvaro Sanchez<br>
> >> > Kitware, Inc.<br>
> >> > Senior R&D Engineer<br>
> >> > 21 Corporate Drive<br>
> >> > Clifton Park, NY 12065-8662<br>
> >> > Phone: 518-881-4901<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > -- <br>
> > Alvaro Sanchez<br>
> > Kitware, Inc.<br>
> > Senior R&D Engineer<br>
> > 21 Corporate Drive<br>
> > Clifton Park, NY 12065-8662<br>
> > Phone: 518-881-4901<br></p>