JScript Example: Using the ISIVTCollection

This example demonstrates how to retrieve the output arguments from the SetExpr command via the ISIVTCollection.

    /*
       This example sets an expression on a parameter using the SetExpr command
       and then accesses the new Expression object(s) via the ISIVTCollection
    */
    // Create the object and set the expression
    NewScene( "", false );
    var oDonut = CreatePrim( "Torus", "NurbsSurface" );
    var ivtRtn = SetExpr( oDonut+"*/kine.local.pos", "RAND(1,-5,5)" );

    // The new Expression object is contained inside an XSICollection
    // which is returned wrapped in an ISIVTCollection
    var xsiColl = ivtRtn("ExprObj");
    try {
       Application.LogMessage( "'ExprObj' contains " + xsiColl.Count + " expression(s)" );
    } catch(e) {
       Application.LogMessage( "Could not find 'ExprObj'" );
    }

    // Output:
    // INFO : 'ExprObj' contains 3 expression(s)

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