[Paraview] Changing the default volume mapper in Paraview?

[Biao She]

I didn't add a new proxy definition for "OpenGLVolumeTextureMapper3D".
Instead, I change the definition for "VolumeFixedPointRayCastMapper" to
something like that:
<SubProxy>
         <Proxy name="VolumeFixedPointRayCastMapper"
           proxygroup="mappers"
           proxyname="OpenGLVolumeTextureMapper3D">
         </Proxy>
  </SubProxy>
It didn't work.
By now, I have tried to add a new proxy definition for
"OpenGLVolumeTextureMapper3D", but I got the same error message. The
following is the XML proxy I wrote:
<SubProxy>
        <Proxy name="VolumeOpenGLTexture3DMapper"
          proxygroup="mappers"
          proxyname="OpenGLVolumeTextureMapper3D">
        </Proxy>
        <ExposedProperties>
          <Property name="SampleDistance" />
        </ExposedProperties>
</SubProxy>
I am wondering if I understand you incorrect.
Also, I notice that in the vtkSMUniformGridVolumeRepresentationProxy.cxx
file (Servers/ServerManager/), between line 100~117, there are some code
specifically related to VolumeFixedPointRayCastMapper, do I need to change
these codes too?

Thanks very much for your help.

Biao



On Thu, Feb 19, 2009 at 12:57 PM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> Did you add a new proxy definition for the
> "OpenGLVolumeTextureMapper3D" proxy? Look at the definition for
> "VolumeFixedPointRayCastMapper" (it's further down in the file).
> You'll need to add a similar one for the "OpenGLVolumeTextureMapper3D"
> proxy.
>
> On Thu, Feb 19, 2009 at 2:55 PM, Biao She <shebiao at gmail.com> wrote:
> > Thanks for your help.
> > I have tried to change "FixedPointVolumeRayCastMapper to something else"
> in
> > the XML file. However, it still didn't work.
> > I am pretty new to these XML files. To the best of my knowledge, I
> changed
> > the XML file to:
> > <SubProxy>
> >         <Proxy name="VolumeFixedPointRayCastMapper"
> >           proxygroup="mappers"
> >           proxyname="OpenGLVolumeTextureMapper3D">
> >         </Proxy>
> >  </SubProxy>
> > I simply delete the "ExposedProperties" part for this mapper, because I
> > don't know how to decide which property should be exposed.
> > After those changes, I opened the iron_protein.vtk data with paraview.
> Here
> > is the error message I got:
> >
> > Unhandled exception at 0x0519e423(vtkPVServerManager.dll) in
> paraview.exe:
> > 0xC0000005: Access violation reading location 0x00000000.
> >
> > Is that because the proxyname is wrong? Or do
> > I ｈａｖｅ ｔｏ ｅｘｐｏｓｅ ｓｏｍｅ ｐｒｏｐｅｒｔｉｅｓ？
> >
> > Ｂｉａｏ
> >
> > On Thu, Feb 19, 2009 at 9:17 AM, Utkarsh Ayachit
> > <utkarsh.ayachit at kitware.com> wrote:
> >>
> >> The combo-box is only for unstructured volume rendering (and works
> >> perfectly fine for that). I believe Biao is taking about image data
> >> volume rendering.
> >>
> >> Utkarsh
> >>
> >> On Thu, Feb 19, 2009 at 10:06 AM, pat marion <pat.marion at kitware.com>
> >> wrote:
> >> > There is a combo box in the Display tab that allows you to select the
> >> > volume mapper, but it looks like that combo box is not working.  I
> >> > know it used to work, does anyone know what happened?
> >> >
> >> > Pat
> >> >
> >> > On Thu, Feb 19, 2009 at 7:38 AM, Utkarsh Ayachit
> >> > <utkarsh.ayachit at kitware.com> wrote:
> >> >> I know it's kind of hacky, but you can simply edit the XML file and
> >> >> change the mapper used. Look at
> >> >> Servers/ServerManager/Resources/rendering.xml. In the XML for
> >> >> "UniformGridVolumeRepresentation"
> >> >> change FixedPointVolumeRayCastMapper to something else. Then after
> the
> >> >> definition for FixedPointVolumeRayCastMapper, add a new definition
> for
> >> >> the VolumeTextureMapper3D and use that in the
> >> >> "UniformGridVolumeRepresentation". I am not sure it's going to work
> >> >> out of the box. But work a try.
> >> >>
> >> >> Utkarsh
> >> >>
> >> >> On Wed, Feb 18, 2009 at 6:42 PM, Biao She <shebiao at gmail.com> wrote:
> >> >>> Hi everyone.
> >> >>> I have debugged paraview for days. The reason is that I want to use
> >> >>> vtkOpenGLVolumeTextureMapper3d mapper instead of the default volume
> >> >>> mapper
> >> >>> vtkFixedPointVolumeRayCastMapper in Paraview.
> >> >>> Till now, I haven't figured out how to do that. Has anyone done this
> >> >>> before?
> >> >>> Any hint and help is greatly appreciated.
> >> >>> Thanks,
> >> >>>
> >> >>> Aaron
> >> >>>
> >> >>>
> >> >>>
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>



-- 
She, Biao
Department of Computing Science,
University of Alberta, Edmonton, Canada
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