[Paraview] VTK files with only points

[Sebastien Jourdain]

Unstructured grid needs cells even though you are only interested in
points. You will have to create one cell per point or one cell that
refer each point.

VTK_VERTEX or VTK_POLY_VERTEX.

You can check the following document to see what I mean by Cell.

Seb

http://www.vtk.org/VTK/img/file-formats.pdf



On Mon, Sep 13, 2010 at 4:28 PM, D Haley <mycae at yahoo.com> wrote:
> Hello,
>
> I am trying to use paraview to visualise molecular dynamics results, as a function of time. I am following the example of
>
> http://www.geophysik.uni-muenchen.de/intranet/it-service/applications/paraview/animations-with-paraview/
>
> and writing a pvd file from my results which references one VTU per timestep. However, the VTU file that the PVD refers to won't open, and spits out the following error when trying to open one directly:
>
>
> ERROR: In /home/user/source/ParaView3/VTK/Filtering/vtkExecutive.cxx, line 757
> vtkStreamingDemandDrivenPipeline (0x253d920): Algorithm vtkXMLUnstructuredGridReader(0x253cbe0) returned failure for request: vtkInformation (0x253dc20)
>  Debug: Off
>  Modified Time: 984588
>  Reference Count: 1
>  Registered Events: (none)
>  Request: REQUEST_INFORMATION
>  FORWARD_DIRECTION: 0
>  ALGORITHM_AFTER_FORWARD: 1
>
> My VTU file looks like this:
>
>
> <VTKFile type="UnstructuredGrid" version="0.1" byte_order="BigEndian">
> <UnstructuredGrid>
> <Piece NumberOfPoints="4">
> <Points>
>        <DataArray type="Float32" NumberofComponents="3" NumberofCells="0" Format="ascii">
>                0.000105948 0.000105948 0.999478
>                0.000105948 0.999478 0.000105948
>                0.999478 0.000105948 0.000105948
>                0.000310148 0.000310148 0.000310148
>        </DataArray>
> </Points>
> </Piece>
> </UnstructuredGrid>
> </VTKFile>
>
>
> Does anyone know what is wrong?
>
> Thanks.
>
>
>
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