Defines a portion of an Analytical Model for an Element. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2011 
Syntax
| C# | 
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| Visual Basic | 
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| Visual C++ | 
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Remarks
 This is used to identify the portion of an analytical model of interest to a client. To identify the portion of the analytical model, the client must identify the curve in question, by using one of the following: 
 - The specific curve within the analytical model.
- The index of the curve within the analytical model.
- The start of the curve.
- The end of the curve.
- The entire curve. This is the default behavior, so this does not need specifying.
Examples
 Copy  C#
 Copy  C# public bool GetReferenceData(FamilyInstance familyInst)
{
    AnalyticalModel analyticalModelFrame = familyInst.GetAnalyticalModel();
    Curve analyticalCurve = analyticalModelFrame.GetCurve();
    if (null != analyticalCurve)
    {
        // test the stable reference to the curve.
        AnalyticalModelSelector amSelector = new AnalyticalModelSelector(analyticalCurve);
        amSelector.CurveSelector = AnalyticalCurveSelector.WholeCurve;
        Reference curveReference = analyticalModelFrame.GetReference(amSelector);
        // test the stable reference to the start point of the curve
        amSelector.CurveSelector = AnalyticalCurveSelector.StartPoint;
        Reference startPointReference = analyticalModelFrame.GetReference(amSelector);
        // test the stable reference to the start point of the curve
        amSelector.CurveSelector = AnalyticalCurveSelector.EndPoint;
        Reference endPointReference = analyticalModelFrame.GetReference(amSelector);
    }
    return true;
} Copy  VB.NET
 Copy  VB.NET Public Function GetReferenceData(familyInst As FamilyInstance) As Boolean
    Dim analyticalModelFrame As AnalyticalModel = familyInst.GetAnalyticalModel()
    Dim analyticalCurve As Curve = analyticalModelFrame.GetCurve()
    If analyticalCurve IsNot Nothing Then
        ' test the stable reference to the curve.
        Dim amSelector As New AnalyticalModelSelector(analyticalCurve)
        amSelector.CurveSelector = AnalyticalCurveSelector.WholeCurve
        Dim curveReference As Reference = analyticalModelFrame.GetReference(amSelector)
        ' test the stable reference to the start point of the curve
        amSelector.CurveSelector = AnalyticalCurveSelector.StartPoint
        Dim startPointReference As Reference = analyticalModelFrame.GetReference(amSelector)
        ' test the stable reference to the start point of the curve
        amSelector.CurveSelector = AnalyticalCurveSelector.EndPoint
        Dim endPointReference As Reference = analyticalModelFrame.GetReference(amSelector)
    End If
    Return True
End Function