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Accessing the List of Selected Components via the Object Model

- When components are selected, the Selection.Item property returns a CollectionItem object which you can use to get the SubComponent object via the CollectionItem.SubComponent property. From there, the SubComponent.ComponentCollection property returns one of the geometry-specific component collections (VertexCollection, ControlPointCollection, EdgeCollection, etc.) containing the selected components:

// C# -- assuming sampled points are selected
CXSIApplication app = new CXSIApplication();
CollectionItem collitem = (CollectionItem)app.Selection[0];
SubComponent subcmp = (SubComponent)collitem.SubComponent;
SampleCollection smplcoll = (SampleCollection)subcmp.ComponentCollection;
app.LogMessage("There are " + smplcoll.Count.ToString() 
   + " selected samples.", siSeverity.siInfo);
foreach (Sample smpl in smplcoll)
{
   app.LogMessage("Current sample[" + smpl.Index.ToString()
       + "] (prev:[" + smpl.Navigate(siNavigateComponentType.siPreviousComponent).Index.ToString()
       + "]; next:[" + smpl.Navigate(siNavigateComponentType.siNextComponent).Index.ToString()
       + "])", siSeverity.siInfo);
}

// JScript -- assuming control points are selected
var subcmp = Selection(0).SubComponent;
var ctrlpts = subcmp.ComponentCollection;
for( var i=0; i<ctrlpts.Count; i++ ) 
{
   LogMessage( "Position of ctrlpt[" + ctrlpts(i).Index + "]: "
       + ctrlpts(i).X + "," 
       + ctrlpts(i).Y + "," 
       + ctrlpts(i).Z );
}

' VBScript -- assuming vertices are selected
set subcmp = Selection(0).SubComponent
for each vtx in subcmp.ComponentCollection
   LogMessage vtx.Index & " has " & vtx.Nodes.Count & " polygon nodes"
next

# Python -- assuming edges are selected
subcmp = Application.Selection(0).SubComponent
for edg in subcmp.ComponentCollection :
   Application.LogMessage( "edge[%s] is hard: %s" % (edg.Index,edg.IsHard) )

# Perl -- assuming Nurbs subsurfaces are selected
my $subcmp = $Application->Selection(0)->SubComponent;
my $coll = $subcmp->ComponentCollection;
for ( my $i=0; $i<$coll->Count; $i++ ) {
   $Application->LogMessage( $coll->Item($i)->TrimCount );
}

Related Scripting Commands

• GetValue (used with "SelectionList")

• PickElement, PickObject

• SelectFilter, SelectEdgeFilter, SelectObjectFilter, SelectPolygonFilter, SelectSampledPointFilter, SelectVertexFilter

• SetEdgeSelectionFilter, SetPointSelectionFilter, SetPolygonSelectionFilter, SetSampleSelectionFilter

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