[Paraview] Viewing volumetric images

[Utkarsh Ayachit]

The two options are different implementations of the volume rendering
algorithms -- one is a pure CPU implementation while other is a
GPU-based implementation.

Utkarsh

On Thu, Feb 24, 2011 at 7:48 AM, Karl Battams <karlbattams at gmail.com> wrote:
> Agreed. I don't have the effects enabled. I should also add that this
> feature was new to the 3.10 release for me, too. It used to work.
> However... (and maybe this is a newbie mistake on my part?)... the problem
> goes away completely if I change the "Volume mapper" to "GPU" instead of
> "Fixed Point". That solves it for me!
> Out of interest (and not to hijack this thread), what are those two options
> for? What difference do they make (aside from fixing this problem)?
> Thanks,
> Karl
>
> On Wed, Feb 23, 2011 at 3:12 PM, Panagiotis Foteinos <pafotein at gmail.com>
> wrote:
>>
>> Nope,
>> disabling the visual effects did not solve the problem.
>>
>> PF
>>
>> On Wed, Feb 23, 2011 at 2:51 PM, Utkarsh Ayachit
>> <utkarsh.ayachit at kitware.com> wrote:
>>>
>>> Does this have anything to do with the fancy "effects" that Ubuntu
>>> has? Does disabling them make this any better?
>>>
>>> Paraview developers with Ubuntu desktops may want to comment.
>>>
>>> Utkarsh
>>>
>>> On Wed, Feb 23, 2011 at 1:59 PM, Panagiotis Foteinos <pafotein at gmail.com>
>>> wrote:
>>> > OpenGL is up to date and works fine in my machine. Direct rendering is
>>> > on.
>>> >
>>> > I repeat that Paraview 3.8.1 works like a charm; Version 3.10.0 has
>>> > this
>>> > problem.
>>> >
>>> > Regards,
>>> > Panagiotis Foteinos
>>> >
>>> > On Wed, Feb 23, 2011 at 1:33 PM, Karl Battams <karlbattams at gmail.com>
>>> > wrote:
>>> >>
>>> >> OpenGL is indeed up-to-date and working, though I do notice that
>>> >> direct
>>> >> rendering is not. It should be for some of the other stuff I do, but I
>>> >> don't
>>> >> know if Paraview will rely on it or not (?). So I'll try a reboot when
>>> >> I get
>>> >> chance and see if that resolves it, but I'm sure that it (direct
>>> >> rendering)
>>> >> was working last week and the Paraview thing was not...
>>> >> Karl
>>> >>
>>> >> On Wed, Feb 23, 2011 at 12:57 PM, Utkarsh Ayachit
>>> >> <utkarsh.ayachit at kitware.com> wrote:
>>> >>>
>>> >>> That's very odd. Any issues with OpenGL drivers? Are they all
>>> >>> up-to-date, working correctly?
>>> >>>
>>> >>> Utkarsh
>>> >>>
>>> >>> On Wed, Feb 23, 2011 at 10:06 AM, Karl Battams
>>> >>> <karlbattams at gmail.com>
>>> >>> wrote:
>>> >>> > I see this too. I compiled 3.10.0 from source on Ubuntu. I'm
>>> >>> > loading
>>> >>> > vtk
>>> >>> > files and volume rendering, and any action on the view causes the
>>> >>> > rendering
>>> >>> > to disappear... and it's kinda hard to get it back. Other views
>>> >>> > (outline,
>>> >>> > etc) do not seem to be affected.
>>> >>> > Karl
>>> >>> >
>>> >>> > On Tue, Feb 22, 2011 at 5:22 PM, Panagiotis Foteinos
>>> >>> > <pafotein at gmail.com>
>>> >>> > wrote:
>>> >>> >>
>>> >>> >> Hello.
>>> >>> >>
>>> >>> >> I switched to version 3.10.0 and observed that viewing volumetric
>>> >>> >> images
>>> >>> >> is buggy.
>>> >>> >>
>>> >>> >> When I open a .mha file and choose Volume as a view option
>>> >>> >> (instead of
>>> >>> >> Outline) I correctly see the result. Rotating or zooming  the
>>> >>> >> volume,
>>> >>> >> however, causes the volume to disappear from the window.
>>> >>> >>
>>> >>> >> I did not observe that behavior for version 3.8.1.
>>> >>> >>
>>> >>> >> I am using Ubuntu with paraview binaries.
>>> >>> >>
>>> >>> >> Regards,
>>> >>> >> Panagiotis Foteinos
>>> >>> >>
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>>
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