Hey Alan, Piotrek, Thanks very much, although I should say that's Piotrek's code, not mine, so no credit to me :).
Script is awesome fast now, good thinking guys. Jules On Wed, Sep 12, 2012 at 10:54 PM, Alan Fregtman <[email protected]>wrote: > Hi Jules, > > > Fear not, for when you're reading built-in attributes (like NodeToVertex) > it's very reliable to go this way. :) > > Also, your duplicate-free version can be made even simpler, shorter and > maybe a teensy bit faster: > > sel = app.Selection(0) > oGeo = sel.SubComponent.Parent3DObject.ActivePrimitive.Geometry > da = oGeo.GetICEAttributeFromName("NodeToVertex").DataArray > outIndexArray = set([ da[i] for i in sel.SubComponent.ElementArray ]) > > It will return a Python "set", which is an iterable object, list-like, but > enforces uniqueness automatically. If you truly need an actual list back, > you can wrap the result in a list() function to convert it, but I don't see > why you'd need it for this case. > > > Cheers, > > -- Alan > > > On Wed, Sep 12, 2012 at 5:16 PM, piotrek marczak < > [email protected]> wrote: > >> this is 100000x times faster but Im not sure its safe getting the data >> from ice attributes? >> >> from win32com.client import constants as c >> app = Application >> # select samples >> sel = app.Selection(0) >> oGeo = >> sel.SubComponent.Parent3DObject.ActivePrimitive.GetGeometry3(0,c.siConstructionModeSecondaryShape) >> # arguments needed otherwise crash >> vton = oGeo.GetICEAttributeFromName("NodeToVertex"); >> outArray = [] >> da = vton.DataArray >> for sampleInd in sel.SubComponent.ElementArray: >> outArray.append( da[ sampleInd ] ) >> >> without duplicates: >> from win32com.client import constants as c >> app = Application >> sel = app.Selection(0) >> oGeo = >> sel.SubComponent.Parent3DObject.ActivePrimitive.GetGeometry3(0,c.siConstructionModeSecondaryShape) >> # arguments needed otherwise crash >> vton = oGeo.GetICEAttributeFromName("NodeToVertex"); >> da = vton.DataArray >> >> cmparray = [0] * oGeo.Points.Count >> outIndexArray = [] >> for sampleInd in sel.SubComponent.ElementArray: >> i = da[ sampleInd ] >> if not cmparray[ i ]: >> outIndexArray.append( i ) >> cmparray[ i ] = 1 >> >> *From:* Jules Stevenson <[email protected]> >> *Sent:* Wednesday, September 12, 2012 10:51 PM >> *To:* [email protected] >> *Subject:* Re: Python, Returning the vertex index from a sample cluster >> >> 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 < >> [email protected]> 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 < >>> [email protected]> 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 <[email protected]> >>>> *Sent:* Wednesday, September 12, 2012 7:58 PM >>>> *To:* [email protected] >>>> *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 >>>> >>> >>> >> >> > >
