Hey Piotrek, Played around with your code and it is a lot faster than the script that I was digging about with. FWIW you can use a set to speed up the lookup stage:
def vertices_from_samples(samples): '''Selects the vertices marked by the current selection of UV samples.''' geo = samples.SubComponent.Parent3DObject.ActivePrimitive.Geometry index_array = [0] * geo.Samples.Count for point in geo.Points: for ptsample in point.Samples: index_array[ptsample.Index] = point.Index outIndexSet = Set() for sample in samples.SubComponent.ElementArray: outIndexSet.add(index_array[sample]) You could probably also pickle the index_array so it only needs calculating once (since it takes a long time on a big mesh), but that opens a whole can of worms in terms of storage and keeping it updated when the mesh changes. Thanks for re-engaging my brain! Jules On Wed, Sep 12, 2012 at 9:35 PM, Jules Stevenson <droolz...@googlemail.com>wrote: > Hi Piotrek, > > Thanks a lot for your reply, but this is exactly what I'm trying to avoid > - I'm actually re-writing a script that does something very similar, as it > is damn slow. Matt Lind mentioned in a previous thread that it is possible > to go from sample > vert (are you around Matt ;)), but I'm really > struggling to ifnd the 'magic' to make this happen. > > Cheers, > > Jules > > On Wed, Sep 12, 2012 at 9:28 PM, piotrek marczak < > piotrek.marc...@gmail.com> wrote: > >> i think you need to go bruteforce... >> pretty slow code but i dont know python >> >> from win32com.client import constants as c >> app = Application >> oGeo = >> app.Selection(0).SubComponent.Parent3DObject.ActivePrimitive.GetGeometry3(0,c.siConstructionModeSecondaryShape) >> # arguments needed otherwise crash >> indarray = [0] * oGeo.Samples.Count >> for point in oGeo.Points: >> for ptsample in point.Samples: >> indarray[ ptsample.Index ] = point.Index >> cmparray = [0] * oGeo.Points.Count >> outIndexArray = [] >> for sample in app.Selection(0).SubComponent.ElementArray: >> if not cmparray[ indarray[ sample ] ]: >> outIndexArray.append( indarray[ sample ] ) >> cmparray[ indarray[ sample ] ] = 1 >> >> for i in outIndexArray: >> Application.LogMessage ( i ) >> >> *From:* Jules Stevenson <droolz...@googlemail.com> >> *Sent:* Wednesday, September 12, 2012 7:58 PM >> *To:* softimage@listproc.autodesk.com >> *Subject:* Re: Python, Returning the vertex index from a sample cluster >> >> Apologies, hit send a little early there.... >> >> for sample in samples.SubComponent.ComponentCollection: >> log(uvs.FindIndices([sample.Index])) >> log (sample.Index) >> log(elements.FindIndex(sample.Index) >> >> The 'elements' clusterElementCollection seems to contain the indices to >> the samples, not the mapping to the geometry, which goes against what is >> syas in the docs: >> >> "The ClusterElementCollection returned by >> Cluster.Elements<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/Cluster.Elements.html>(and >> Envelope.Elements<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/Envelope.Elements.html>) >> provides the mapping between an index of a component in a cluster with the >> index of the component on the >> Geometry<http://download.autodesk.com/global/docs/softimage2013/en_us/sdkguide/si_om/Geometry.html>. >> For example index 10 on a polygon Cluster might refer to Polygon 45 on the >> geometry, in which case ClusterElementCollection.Item(10) has the value 45. >> This data is read-only." >> >> This is not what I get at all, for a start the cluster.Elements.Count >> returns approximatly 80k, which makes no sense as a geometry index since >> there are only about 20k points. Clearly this is an array of the sample >> indices (4 per vert). Soooooooo, how do I get the point / facet / polygon >> ID from a sample? >> >> Any help much appreciated, this is driving me nuts. >> >> Cheers, >> >> Jules >> > >
