Hi Rohini, the first error is just a warning generated from VTK while it's computing the initial tessellation of the surface. Most of the times it has no effect on the generated centerlines. Probably the surface including the flow extensions looks ok, doesn't it?
The second error shows that there's a problem with the remeshed surface. Can you please post the exact command line you use for generating the mesh? I'd like to see what element size you're trying to achieve. Just as a test, one thing you can try is reducing the number of points around the flow extensions using the vmtkflowextensions option -boundarypoints 20 (the default is 50) Let us know Luca On Sep 6, 2011, at 9:21 PM, Retarekar, Rohini wrote: > Hi everyone, > > I am trying to generate volume meshes for 3d models reconstructed using VMTK. > I have .vtp files which have been clipped to create open inlets/outlets. The > problem I am facing pertains to addition of cylindrical flow extensions. > While adding the extensions (vmtksurfacereader -ifile foo.vtp --pipe > vmtkcenterlines -seedselector openprofiles --pipe vmtkflowextensions > -adaptivelength 1 -extensionratio 20 -normalestimationratio 1 -interactive 0 > --pipe vmtksurfacewriter -ofile foo_ex.vtp) , it gives me a warning: > > > Warning: In /usr/css/opt/src/VTK/Graphics/vtkDelaunay3D.cxx, line 487 > vtkDelaunay3D (0x163d420): 11 degenerate triangles encountered, mesh quality > suspect. > > On giving the mesh command : it does the iterations and gives the error: > > > ERROR: In /usr/css/opt/src/vmtk-0.8/vtkVmtk/Misc/vtkvmtkTetGenWrapper.cxx, > line 310 > vtkvmtkTetGenWrapper (0x95b5870): Invalid element found. > > TetGen command line options: pq1.414000Ys175.000000T1.000000e-08zQm > Error: Invalid PLC. > Facet (4865, 2324, 3008) (10113) is not a valid polygon. > ERROR: In /usr/css/opt/src/vmtk-0.8/vtkVmtk/Misc/vtkvmtkTetGenWrapper.cxx, > line 424 > vtkvmtkTetGenWrapper (0x95b5870): TetGen quit with an exception. > > > If I skip the extension part, I am able to mesh the model successively. > > Can someone please help me with this? > > Thank you. > > Best Wishes, > Rohini > ------------------------------------------------------------------------------ > Malware Security Report: Protecting Your Business, Customers, and the > Bottom Line. Protect your business and customers by understanding the > threat from malware and how it can impact your online business. > http://www.accelacomm.com/jaw/sfnl/114/51427462/ > _______________________________________________ > vmtk-users mailing list > vmtk-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/vmtk-users ------------------------------------------------------------------------------ Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ _______________________________________________ vmtk-users mailing list vmtk-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vmtk-users
