Hi Stefan, IIRC there is a .vtu file containing polyhderal cells in the VTK DATA repository.
Otherwise, I attached a .xmf and a .vtu file containing each containing identical data, i.e. 2 hexahedral and 2 polyhderal cell. Please note that the white-space in these files has no meaning, and that for the .xmf file you need a recent ParaView nightly build. Best regards, Armin On 09/27/2016 07:42 AM, Stefan Melber wrote:
Hi Armin, sounds thats the thing i searched for! Will check it out today and see if it does the job. Is there a demo-xml file around with such polyhedral cells? Best regards and thank you, StefanHi Stefan, If I understand your problem correctly, then you are looking for polyhedral cells (i.e. N face cells, where each face is a M edge polygon). Polyhedral cells are commonly used in Computational Fluid Dynamics codes, as e.g. OpenFOAM, and VTK/ParaView support them already for quite some time (i.e. since around 2010), see [1] for more details.My problem is now i have a set of complex shaped volumes (dual-grid data) which cannot be found in the list of cell types for unstructured grid data. Therefore i use the polygonal data and color each cell with one color. Of course for further analysis (e.g. integration of the cell volumes, volume gradient and so on) i need a way to give a set of (closed surface) poly-data elements a kind connection to form a volume to handle them together.In which file format do you store your data? For example, the unstructured VTK XML format [2] has support for polyhedral cells. An alternative would be the XDMF file format [3] to which I recently added polyhedral cell support [4,5]. Please note that the latest release versions of VTK (7.0) or ParaView (5.1) don't support the polyhedral cells in XDMF yet, but the nightly builds and the upcoming releases (i.e. VTK 7.1 and ParaView 5.2) will have this feature. Cheers, Armin [1] http://www.vtk.org/Wiki/VTK/Polyhedron_Support [2] http://www.vtk.org/Wiki/VTK_XML_Formats [3] http://www.xdmf.org [4] https://gitlab.kitware.com/xdmf/xdmf/commit/0a9fbd0590dff8a677c86754169cd2ccd72fe4b1 [5] https://gitlab.kitware.com/vtk/vtk/commit/802c9b61de28e560c2659d2af76660bbb49c68be
polyhedron.vtu
Description: model/vnd.vtu
polyhedron.xmf
Description: audio/xmf
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