[Paraview] Pvbatch: Volume rendering a thresholded unstructured grid

[Jesus Pulido]

I omitted that line before because I was getting the following error.
Readding it gives this error:
Traceback (most recent call last):
  File "/home/user/DNS/volume.py", line 40, in <module>
    DataRepresentation2.ColorArrayName = 'volume_scalars'
  File
"/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
line 212, in __setattr__
    setter(self, value)
  File
"/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
line 2267, in setProperty
    return self.SetPropertyWithName(propName, value)
  File
"/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
line 267, in SetPropertyWithName
    prop.SetData(arg)
  File
"/home/user/Programs/ParaView-3.11.1-git/bin/Utilities/VTKPythonWrapping/site-packages/paraview/servermanager.py",
line 695, in SetData
    raise ValueError("Could not locate array %s in the input." % arr)
ValueError: Could not locate array volume_scalars in the input.

Jesus


On Mon, Aug 29, 2011 at 3:53 PM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> Try adding:
>
> DataRepresentation2.ColorArrayName = 'volume_scalars'
>
> Utkarsh
>
> On Wed, Aug 24, 2011 at 7:02 PM, Jesus Pulido <jpulido at ucdavis.edu> wrote:
> > I am trying to volume render an unstructured grid of points using pvbatch
> > but I am getting an error:
> >
> > ERROR: In
> >
> /home/user/Programs/ParaView-3.11.1-git/ParaView/VTK/VolumeRendering/vtkUnstructuredGridVolumeRayCastMapper.cxx,
> > line 211
> > vtkUnstructuredGridVolumeRayCastMapper (0x2473a40): Can't use the ray
> cast
> > mapper without scalars!
> >
> > When trying to use Bunyk Ray casting
> >
> > and
> >
> > ERROR: In
> >
> /home/user/Programs/ParaView-3.11.1-git/ParaView/VTK/VolumeRendering/vtkOpenGLProjectedTetrahedraMapper.cxx,
> > line 237
> > vtkOpenGLProjectedTetrahedraMapper (0x2ab3190): Can't use projected
> > tetrahedra without scalars!
> >
> > When trying to use Projected tetra.
> >
> > I am using the "latest" git version as of today. I also tried with
> PV3.10.1
> > 64bit linux binary and I am having the same error with pvbatch.
> >
> >
> > Here is the script that I am using in pvbatch. I generated this script
> with
> > the help from using python trace within paraview (where the rendering
> > works). I think it tries to reference the data under
> >
> > Threshold1.Scalars = ['POINTS', 'volume_scalars']
> >
> > but even if I comment this line out of my script I obtain the same error
> as
> > above so somehow it's not able to reference the scalar points.
> > --------
> > try: paraview.simple
> > except: from paraview.simple import *
> > paraview.simple._DisableFirstRenderCameraReset()
> >
> > wavelet_ = XMLImageDataReader( FileName=['/home/wavelet.vti'] )
> >
> > wavelet_.CellArrayStatus = []
> > wavelet_.PointArrayStatus = ['volume_scalars']
> >
> > RenderView4 = GetRenderView()
> > RenderView4.CameraViewUp = [0.0, 0.0, 1.0]
> > RenderView4.CameraPosition = [-725.7466298125642, 127.5, 127.5]
> > RenderView4.CameraFocalPoint = [127.5, 127.5, 127.5]
> > RenderView4.CameraClippingRange = [590.9891635144385, 1185.4328292597527]
> > RenderView4.Background = [0.0, 0.0, 0.0]
> > RenderView4.CenterAxesVisibility = 0
> > RenderView4.OrientationAxesVisibility = 0
> > RenderView4.ViewSize = [800, 600]
> >
> > SetActiveSource(wavelet_)
> > Threshold1 = Threshold()
> >
> > a1_volume_scalars_PVLookupTable = GetLookupTableForArray(
> "volume_scalars",
> > 1, RGBPoints=[1.9, 0.0, 1.0, 0.0, 1.95, 1.4972662149337713e-07, 1.0,
> > 0.0014876325368879406, 2.0, 0.0, 0.996078431372549, 0.0, 2.05,
> > 1.6337586200641548e-07, 1.0, 0.0015525676008689975, 2.1,
> > 1.2838779441233928e-07, 1.0, 0.0013859544585118407] )
> > a1_volume_scalars_PiecewiseFunction = CreatePiecewiseFunction()
> > a1_volume_scalars_PiecewiseFunction.Points = [1.9, 0.1, 1.95, 0.5, 2.0,
> 1.0,
> > 2.05, 0.5, 2.1, 0.1]
> >
> > Threshold1 = GetActiveSource()
> > Threshold1.Scalars = ['POINTS', 'volume_scalars']
> > Threshold1.ThresholdRange = [1.9, 2.1]
> >
> > DataRepresentation2 = Show()
> > DataRepresentation2 = GetDisplayProperties(Threshold1)
> > DataRepresentation2.EdgeColor = [0.0, 0.0, 0.5000076295109483]
> > DataRepresentation2.SelectMapper = 'Fixed point'
> > DataRepresentation2.ScalarOpacityFunction =
> > a1_volume_scalars_PiecewiseFunction
> > DataRepresentation2.ScalarOpacityUnitDistance = 7.74209043877865
> > DataRepresentation2.LookupTable = a1_volume_scalars_PVLookupTable
> > DataRepresentation2.Representation = 'Volume'
> > DataRepresentation2.SelectMapper = 'Bunyk ray cast'
> >
> > Render()
> >
> > -----
> >
> >
> > Jesus
> >
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