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 <[email protected]>: > 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 <[email protected]> > 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 < >> [email protected]>: >> >> 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 < >> [email protected] > 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 < [email protected] >> > 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/ , >> 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 >> >> >> >> >> >> >> > >
