Okay now I have the SDK explorer running (thanks for the tip, I seem
to always forget about it).
A texture projection and a color at vertices are sample cluster properties.
Weight, symmetry, shape key and envelope map clusters are point
cluster properties. The example from the ClusterElementCollection
entry was the right one.
That said, there seem to be an error in this example. At this line:
indexOnGeometry = oCluster.Elements.Item(i)
I always got a Python mismatch error (occurs when trying to perform
some operations with different data types). However using
indexOnGeometry = oCluster.Elements.Array[i]
worked like a charm. Might worth checking out... :-)
Thanks, my script works beautifully now :-D
Bernard
On 8/25/05, Andrew Skowronski <askowron(at)softimage.com> wrote:
> Are you taking into account the fact that some cluster properties
> are on different types of clusters? E.g. some are per-vertex,
> some per-polygon etc So the number of elements in the cluster
> doesn't necessarily map to the number of polygons. You should find
> a few more examples that should help, and SDK explorer shows cluster property content.
>
> -Andrew
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf
> Of Bernard Lebel
> Posted At: Thursday, August 25, 2005 3:33 PM
> Posted To: xsi
> Conversation: [script] Weight map
> Subject: [script] Weight map
>
>
> Hello,
>
> I'm new to scripting weight maps, envelopes and this type of maps in general.
>
> When I log the sample indices of a texture projection, I get the whole
> UV info. However when I try the same thing with a weight map, a
> symmetry map or an envelope, I get only half of the polygon info.
>
> I'm using this example from the SDK, slightly modified (to make sure
> it won't attempt to find a second tuple of values with weight maps and
> symmetry maps):
>
> --------------------------------------------------
> ClusterProperty
>
> SIObject
> ProjectItem
> Property
> ClusterProperty
> --------------------------------------------------
>
> ' VBScript example showing how to find the
> ' texture projection UV values associated
> ' with each vertex of a polygon
>
> set oRoot = application.activeproject.activescene.root
> set oObject = oRoot.addgeometry("Grid", "MeshSurface")
> setValue oObject & ".polymsh.geom.subdivu", 2
> setValue oObject & ".polymsh.geom.subdivv", 1
>
> BlendInPresets "Image", oObject, 1, False
> CreateTextureSupport oObject, siTxtPlanarXZ, siTxtDefaultPlanarXZ,
> "Texture_Support"
>
> set oUVWProp = oObject.Material.CurrentUV
>
> set oGeom = oObject.activeprimitive.geometry
>
> ' get UVW array
> aUVW = oUVWProp.elements.Array
>
> ' The cluster knows the relationship between
> ' indices of the Samples and indices of the Sample cluster
> set oCluster = oUVWProp.Parent
>
> for Each oPolygon In oGeom.Polygons
>
> ' get polygon index
> oPolygonId = oPolygon.Index
>
> ' get points index array under polygon
> aPntsIndex = oPolygon.Points.IndexArray
>
> logMessage "Polygon" & oPolygonId
>
> ' get sample indices
> set oSamples = oPolygon.Samples
>
> for i = 0 To oSamples.Count - 1
> 'Map from the geometry index to the cluster index
> indexInCluster = oCluster.FindIndex( oSamples(i).Index )
>
> if ( indexInCluster <> -1 ) then
> logMessage "Point" & aPntsIndex(i) & ":" & "UV("_
> & aUVW(0, oSamples(i).Index) & _
> "," & aUVW(1, oSamples(i).Index) & ")"
> end if
> next
>
> next
>
>
>
>
> I will not print the full output of my script here because it would be
> hard to swallow, however at one point, no point nor sample gets
> printed under polygons, after polygon # 11 (my object has 48... a
> sphere).
>
>
> Thanks
> Bernard
>
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