Ok - thanks. I'll give that a try. If anybody can shed light on how XDMF topology types map onto VTK data types within Paraview that would be great too.
Dan On Sun, Nov 28, 2010 at 3:08 PM, David Doria <[email protected]> wrote: > On Sun, Nov 28, 2010 at 3:51 PM, Dan Lussier <[email protected]> wrote: > > I had a question about the nature of the underlying VTK data. > > In my work I am often visualizing particle data, which I currently have > in > > XMDF files with Polyvertex topology. When I load the files into PV, the > > data ends up being represented by a vtkUnstructuredGrid. What is the > > difference between vtkUnstructuredGrid versus vtkPolyData? I know that > both > > inherit from abstract vtkPointSet so they are generally fairly > > interchangeable as most filters appear to require only a vtkPointSet. > Are > > there any filters that would take one but not the other? > > vtkUnstructuredGrid allows you to have 3D (volumetric) cells, where > vtkPolyData only allow a maximum of 2D (polygonal) cells. > > http://www.vtk.org/Wiki/VTK/Tutorials/3DDataTypes > > > Some filters I am looking to use want a vtkPointSet input, but I have > > vtkImageData (via XMDF 3DCoRectMesh topology). What would be the best > way > > to make the conversion in Paraview? > > Many thanks. > > Dan Lussier > > vtkImageDataGeometryFilter does this, but I don't see an interface for it > in PV. > > Here is an example of how to use it: > http://www.vtk.org/Wiki/VTK/Examples/Cxx/ImageData/ImageDataGeometryFilter > > and here is how to make an existing VTK filter accessible in ParaView: > http://www.vtk.org/Wiki/Plugin_HowTo#Enabling_an_existing_VTK_filter > > Good luck, > > David >
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