[vtkusers] Problems in rendering volume with vtkOpenVR

[Ken Martin]

I have not tested volume rendering with vtkOpenVR but ... I can't think of
any reason it would not work. I suspect there is maybe a some sort of issue
with the volume renderer copying the frame back into (or out of) the frame
buffer. I suspect if you can find the issue the fix will be pretty easy. If
I get a chance I'll try giving it a shot.

On Wed, Jul 6, 2016 at 1:54 PM, Guilherme Alcarde Gallo <
guilherme.gallo at eldorado.org.br> wrote:

> Hello all!
>
>
>
> I have succeeded in building VTK with vtkOpenVR remote module and running
> a simple Cone example in my OSVR HMD.
>
> But when I’ve attempted to run the volume rendering example
> "GPURenderDemo", I got a black screen and a lot of repetitive errors:
>
> *ERROR: In*
>
> *C:\VTK-master\Rendering\OpenGL2\vtkTextureObject.cxx,*
>
> *line 2035*
>
> *vtkTextureObject (0000000BE6462060): failed at glCopyTexImage2D 6402 1
> OpenGL errors detected*
>
> *  0 : (1282) Invalid operation*
>
>
>
> Also, I have tried to run the CPU-based volume rendering example
> “FixedPointVolumeRayCastMapperCT”.
>
> Although the performance is poor, it works, since the texture successfully
> appears in the HMD and its tracking is integrated with the WindowInteractor.
>
>
>
> My colleague has made an investigation about this issue comparing both
> examples, he concluded that the problem is related with the
> “SmartVolumeMapper” class.
>
>
>
> So I would like to ask a few questions:
>
> 1)      Does the remote module vtkOpenVR has support for volume
> rendering?
>
> 2a) If it does, what I'm doing wrong? Is there any problem with
> SmartVolumeMapper implementation for running vtkOpenVr applications?
>
> 2b) If it don’t, how I can add volume rendering support for vtkOpenVR? (I
> and my team are willing to do this)
>
>
>
> Thank you very much!
>
> Guilherme
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

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