[vtkusers] Volume rendering problem

[Elvis Stansvik]

2016-08-29 10:37 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:

> 2016-08-11 21:30 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
>
>> 2016-08-11 20:38 GMT+02:00 Aashish Chaudhary <
>> aashish.chaudhary at kitware.com>:
>>
>>> Elvis, Robert,
>>>
>>> Alvaro is looking into this issue. Hopefully soon we will have few
>>> answers. The bottom line is that in a pure opengl application, we were able
>>> to render texture larger than 4GB but it is too early to say where the
>>> bottleneck is.
>>>
>>
>> Alright, good to know. Thanks for the info and looking forward to hear
>> what your findings are.
>>
>
> Hi again Aashish, did you or Alvaro make any findings regarding this?
>
> I have to ask: Since you called it an "issue", do you mean that it should
> be possible to render volumes larger than 2048 voxels in one dimension
> (despite the graphics card texture size limit)?
>

I can also confirm that on an older system (SandyBridge, HD 3000 graphics),
I hit the limit at 1024, I guess because of the older graphics chip.

So my question is really: Should VTK be able to render volumes that are
larger (in some dimension) than the maximum texture size of the GPU? Or do
I have to split/juggle multiple volumes to work around this myself?

Elvis


>
> Because at the moment I'm working under the assumption that it should not
> be possible, and I'm trying to work around it in our application by trying
> to work with multiple smaller volumes instead. But if it turns out it's a
> bug/unintended limitation in VTK, I might not have to do that (if it's
> fixed/can be worked around).
>
> Thanks in advance,
> Elvis
>
>
>>
>> Elvis
>>
>>
>>>
>>> - Aashish
>>>
>>> On Thu, Aug 11, 2016 at 11:14 AM RobertS <spir.robert at gmail.com> wrote:
>>>
>>>> it's also 2048. According to this
>>>> https://developer.apple.com/opengl/capabilities/ AMD graphics should
>>>> have
>>>> the limit at 8192-16348, but right now I don't have any to test it.
>>>> (MAX_3D_TEXTURE_SIZE attribute)
>>>> Robert
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context: http://vtk.1045678.n5.nabble.c
>>>> om/Volume-rendering-problem-tp5739662p5739683.html
>>>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>>> _______________________________________________
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at
>>>> http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>
>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> http://public.kitware.com/mailman/listinfo/vtkusers
>>>>
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://public.kitware.com/mailman/listinfo/vtkusers
>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160829/ca15e8ef/attachment.html>