Thanks! Actually, it looks like the normals at the inner boundary are pointing the wrong way, into the "donut volume" and not into the hole as they should. The inner and outer boundaries are both the results of separate surface remeshing operations.
Martin On 24 September 2012 15:51, Luca Antiga <luca.ant...@gmail.com> wrote: > Hi Martin, > the orientation shouldn't matter as long as the normals filter > can orient the normals outwards automatically, which is trivial > for a closed surface but might be not trivial for a complex one > (or downright impossible, but it shouldn't be your case). > > Try to run vmtksurfacenormals and see what comes out of that > with Paraview (using the Glyph filter to visualize normals). The > normals should be all outwards, if they're not then maybe that's > the issue. > > Best, > > Luca > > > > On Sep 24, 2012, at 3:46 PM, Martin Sandve Alnæs wrote: > >> Hi Luca, >> we have some issues with the meshing though. Karen is testing it. >> >> The remeshed surface looks fine, but it may seem that the >> mesh generation misinterprets it. Sometimes it crashes, >> some times the result is weird. >> >> Do the triangle orientations in the endcaps triangulation >> matter? It doesn't look like it matters in the annular endcaps >> mode code that I used as my starting point. >> >> Martin >> >> >> On 24 September 2012 15:27, Luca Antiga <luca.ant...@gmail.com> wrote: >>> Hi Martin, >>> this is awsome! Looking forward to your very welcome contribution. >>> Nice job >>> >>> Luca >>> >>> >>> On Sep 21, 2012, at 1:38 PM, Martin Sandve Alnæs wrote: >>> >>>> Hi Roman, >>>> thanks for the reply. As you suggested I looked into vtk meshing >>>> possibilities, and I ended up using >>>> vtkPolygon::NonDegenerateTriangulate(). I will merge my vmtk >>>> extensions into vmtk when it's been tested properly. Attached is an >>>> image of the result for the curious. Notice the hole in the middle, >>>> which is a canal going through to the other side. >>>> >>>> Martin >>>> >>>> On 18 September 2012 15:35, Dr. Roman Grothausmann >>>> <grothausmann.ro...@mh-hannover.de> wrote: >>>>> Hi Martin, >>>>> >>>>> >>>>> Could You post an image visualizing Your structure? >>>>> One idea that came into my mind would be to use vtkDelauney3D that You >>>>> could >>>>> use to generate a convex hull, to cap Your structure. Though, depending on >>>>> Your structures, You might need to find a way to remove parts of the >>>>> convex >>>>> hull, that are not needed for capping. >>>>> >>>>> Roman >>>>> >>>>> >>>>> On 18/09/12 11:50, Martin Sandve Alnćs wrote: >>>>>> >>>>>> Hi! >>>>>> I'd like to close the endcaps of a geometry that is topologically like >>>>>> an extruded donut, but where the outer boundary is a non-convex >>>>>> butterfly-like polygon. The annular endcaps approach does not work for >>>>>> this case. I have some slighly cumbersome ideas involving meshing >>>>>> these endcaps in external software. But I'm wondering if anyone has a >>>>>> good alternative approach within vmtk? >>>>>> >>>>>> -- >>>>>> Martin >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> Live Security Virtual Conference >>>>>> Exclusive live event will cover all the ways today's security and >>>>>> threat landscape has changed and how IT managers can respond. Discussions >>>>>> will include endpoint security, mobile security and the latest in malware >>>>>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ >>>>>> _______________________________________________ >>>>>> vmtk-users mailing list >>>>>> vmtk-users@lists.sourceforge.net >>>>>> https://lists.sourceforge.net/lists/listinfo/vmtk-users >>>>> >>>>> >>>>> -- >>>>> Dr. Roman Grothausmann >>>>> >>>>> Tomographie und Digitale Bildverarbeitung >>>>> Tomography and Digital Image Analysis >>>>> >>>>> Institut für Funktionelle und Angewandte Anatomie, OE 4120 >>>>> Medizinische Hochschule Hannover >>>>> Carl-Neuberg-Str. 1 >>>>> 30625 Hannover >>>>> >>>>> Tel. +49 511 532-9574 >>>> <resized.png>------------------------------------------------------------------------------ >>>> Got visibility? >>>> Most devs has no idea what their production app looks like. >>>> Find out how fast your code is with AppDynamics Lite. >>>> http://ad.doubleclick.net/clk;262219671;13503038;y? >>>> http://info.appdynamics.com/FreeJavaPerformanceDownload.html_______________________________________________ >>>> vmtk-users mailing list >>>> vmtk-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/vmtk-users >>> > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ vmtk-users mailing list vmtk-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vmtk-users
