Accessing the List of Selected Components via the C++ API

- Use the Softimage Object Model SubComponent interface via the CComAPIHandler , which is a kind of a COM wrapper for the C++ API:

    // C++ API -- iterating over the selected components
    Application app;

    // Make sure something is selected
    Selection sel = app.GetSelection();
    LONG lCount = sel.GetCount();
    app.LogMessage(L"Found " + CString(lCount) + L" selected items.");
    if ( lCount < LONG(1) )
    {
       app.LogMessage( L"No components are selected" );
       return CStatus::OK;
    }
    for ( LONG i=0; i<lCount; i++ )
    {
       if ( sel.GetItem(i).GetClassIDName() == L"X3DObject" )
       {
           X3DObject x3dobj(sel.GetItem(i));
           app.LogMessage(L"\titem[" + CString(i) + L"]: " + x3dobj.GetName() );
       }
       else
       {
           app.LogMessage(L"\titem[" + CString(i) + L"]: " + sel.GetItem(i).GetClassIDName() );
       }
    }

    // The collection of selected components exists in the first member
    CComAPIHandler comCollItem( sel.GetItem(0) );
    CComAPIHandler comSubComp( comCollItem.GetProperty(L"SubComponent") );
    CValue subCompType = comSubComp.GetProperty( L"Type" );
    app.LogMessage( L"Type of subcomponent: " + CString(subCompType) );

    // Grab the component collection
    CComAPIHandler comCompColl( comSubComp.GetProperty(L"ComponentCollection") );

    // Now we can iterate over the component collection's members
    LONG lCollCount( comCompColl.GetProperty(L"Count") );
    app.LogMessage(L"Found " + CString(lCollCount) + L" selected components.");
    for ( LONG j=0; j<lCollCount; j++ )
    {
       CValue rtn;              // output from the Item property
       CValueArray idx; idx.Add(j); // set the index to use
       comCompColl.Invoke( L"Item", CComAPIHandler::PropertyGet, rtn, idx );

       // From the CRef class, we can convert it to the actual class
       CRef itm(rtn);
       if ( itm.GetClassID() == siVertexID )
       {
           Vertex vtx = Vertex(itm);
           app.LogMessage( L"Found a vertex at index " + CString(vtx.GetIndex()) );
       }
       if ( itm.GetClassID() == siSampleID )
       {
           Sample smp = Sample(itm);
           app.LogMessage( L"Found a sample at index " + CString(smp.GetIndex()) );
       }
       if ( itm.GetClassID() == siEdgeID )
       {
           Edge edg = Edge(itm);
           app.LogMessage( L"Found a edge at index " + CString(edg.GetIndex()) );
       }
       if ( itm.GetClassID() == siControlPointID )
       {
           ControlPoint ctrl = ControlPoint(itm);
           app.LogMessage( L"Found a control point at index " + CString(ctrl.GetIndex()) );
       }
       // etc.
    }

Autodesk Softimage v7.5