Thanks for the input. Filter points with a small value fixed it for me - happy camper now.
MB Den 24. marts 2015 kl. 12:34 skrev julien carmagnac <carmagnacjul...@gmail.com>: > Morten, > I already got Vray render error due to geometry import problem. > In my case, I have floating points without any polygon. > To quick check it manually you can : > - select all objects to check > - select all polygon > - select all adjacent points > - and finally, Invert selection > If it select points, you can delete them because there are no polygon > attached to it. > > 2015-03-24 11:40 GMT+01:00 Oscar Juarez < tridi.animei...@gmail.com > <mailto:tridi.animei...@gmail.com> > : > > The script only selects the bad polygons, also the one on the blog, they > > don't do anything else, this will let you identify the polygons that are > > the problem, but then you have to decide what to do. If the issue comes > > from overlapping points maybe even a very small smooth might move them > > apart and avoid the zero area without changing topology. > > > > On Tue, Mar 24, 2015 at 11:10 AM, Morten Bartholdy < x...@colorshopvfx.dk > > <mailto:x...@colorshopvfx.dk> > wrote: > > > Thanks a lot Oscar - I will give both methods a shot and see what happens. > > > > > > Morten > > > > > > > > > > > > > > > Den 24. marts 2015 kl. 10:45 skrev Oscar Juarez < > > > tridi.animei...@gmail.com <mailto:tridi.animei...@gmail.com> >: > > > > > > > this should fix the script, it will select all the polygons that are > > > > wrong > > > > > > > > si = Application > > > > epsilon = 0.00001 > > > > > > > > # Get PolygonArea DataArray (which is a tuple) > > > > sel = si.Selection(0) > > > > attr = sel.ActivePrimitive.GetICEAttributeFromName( "PolygonArea" ) > > > > areaData = attr.DataArray > > > > > > > > # > > > > # Find the indices of the bad polys > > > > # > > > > bad = [ x for x,y in enumerate( areaData ) if y < epsilon] > > > > > > > > # Select the degenerates with a string like 'cube.poly[112,114,155]' > > > > str_indices = '%s.poly[%s]' % (sel.FullName, ','.join(str(i) for i in > > > > bad)) > > > > si.SelectGeometryComponents(str_indices) > > > > > > > > On Tue, Mar 24, 2015 at 10:38 AM, Oscar Juarez < > > > > tridi.animei...@gmail.com > > > > <mailto:tridi.animei...@gmail.com> > wrote: > > > > > As the blog post says, degenerate polygons most of the time are zero > > > > > area > > > > > polys, a filter points with a very small distance have solved this > > > > > kind of > > > > > issues for me on the past, but since your geometry is deformed you > > > > > have to > > > > > check if it doesn't break your plotted shape or if it doesn't break > > > > > other > > > > > things. > > > > > > > > > > On Tue, Mar 24, 2015 at 9:44 AM, Morten Bartholdy < > > > > > x...@colorshopvfx.dk > > > > > <mailto:x...@colorshopvfx.dk> > wrote: > > > > > > I have a scene which crashes more or less randomly and Arnold prints > > > > > > an > > > > > > error that there are degenerate polygons in the scene. The geometry > > > > > > consist > > > > > > of 3600 simple cubes which are imported from an alembic file > > > > > > generated in > > > > > > Cinema4D, so manually examining every object is not really an > > > > > > option. So my > > > > > > question is how to fix the degenerate polygons? I found this script: > > > > > > http://xsisupport.com/2013/03/13/finding-degenerate-polygons-by-area/ > > > > > > <http://xsisupport.com/2013/03/13/finding-degenerate-polygons-by-area/> > > > > > > , > > > > > > but it fails with an error: > > > > > > > > > > > > This is what I ran: > > > > > > > > > > > > > > > > > > si = Application > > > > > > epsilon = 0.00001 > > > > > > > > > > > > # Get PolygonArea DataArray (which is a tuple) > > > > > > attr = si.Selection(0).ActivePrimitive.GetICEAttributeFromName( > > > > > > "PolygonArea" ) > > > > > > areaData = attr.DataArray > > > > > > > > > > > > # > > > > > > # Find the indices of the bad polys > > > > > > # > > > > > > bad = [ x for x,y in enumerate( areaData ) if y < epsilon] > > > > > > > > > > > > # Select the degenerates with a string like 'cube.poly[112,114,155]' > > > > > > si.SelectGeometryComponents( 'Null2.Cube_[%s]' % ','.join(str(i) for > > > > > > i in > > > > > > bad) ) > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > - and the error: > > > > > > > > > > > > > > > > > > Application.SelectMembers("abc_Tiles", "", "") > > > > > > # ERROR : 2000 - Argument 0 (SelectionList) is invalid > > > > > > # ERROR : 2001-SELE-SelectGeometryComponents - Argument 0 is invalid > > > > > > Application.SelectGeometryComponents("Null2.Cube_[]") > > > > > > # ERROR : Traceback (most recent call last): > > > > > > # File "<Script Block >", line 14, in <module> > > > > > > # si.SelectGeometryComponents( 'Null2.Cube_[%s]' % ','.join(str(i) > > > > > > for i in > > > > > > bad) ) > > > > > > # File "<COMObject Application>", line 2, in > > > > > > SelectGeometryComponents > > > > > > # COM Error: The parameter is incorrect. (0x-7ff8ffa9) - [line 14] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Line 14 is this one: si.SelectGeometryComponents( 'Null2.Cube_[%s]' > > > > > > % > > > > > > ','.join(str(i) for i in bad) ) > > > > > > > > > > > > > > > > > > > > > > > > So what might be wrong with this one, and when I know which polygons > > > > > > are > > > > > > bad, how can I fix them? I am thinking since they dont have an ICE > > > > > > tree > > > > > > they might have no ICE PolygonArea property... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Best > > > > > > > > > > > > Morten > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
