Greetings Dave, This is a request for a minor(?) alter in a VTK rendering algorithm.
Polyhedral finite elements are reaching a level of numerical maturity where their use is likely to become widespread -- and correspondingly an increased desire to display them in ParaView. For convex polygonal faces of a polyhedron, the VTK algorithms work fine, and omitting the interior triangle edges was a nice rendering improvement.
However, the discrete numerical algorithms that have emerged surprisingly work for polyhedrons that have the "star property." Long story told short, the attached ParaView figure in the right hand panel contains a polyhedral finite element that has a non-planar, concave polygonal face. Numerically, this polyhedral configuration works very well.
Would it be possible for rendering purposes, to create the polygon's triangular sub-facets by starting with the polygon's vertex closest to the average coordinate of the polygon's vertex nodal points? Maybe this particular polygon vertex becomes a "common" vertex for all of the sub-triangles?
Samuel W. Key FMA Development, LLC On 8/1/2012 4:27 AM, David E DeMarle wrote:
Each polygon in your data file has only two points. They need 3 or more coplanar points and must not be concave for VTK to work with them. Also, the last polygon references point id 3, which doesn't exist. David E DeMarle Kitware, Inc. R&D Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909 On Tue, Jul 31, 2012 at 6:14 PM, Sanket Jain <jainsank...@gmail.com> wrote:Hello Members, I created a sample vtk file to visualize a curve in Paraview. It reads in without any errors but nothing comes on the viewer. Can someone point in the right direction to fix this? Sanket _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
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