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
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
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 (and
Envelope.Elements) provides the mapping between an index of a component in a
cluster with the index of the component on the Geometry. 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
