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> 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> > 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 >> >> >> >> >> >
