Set adaptive component parameters with placement point coordinates

A reader asked how to compute and schedule the placement point coordinates of adaptive component families. Here is a sample using the Parameter API and Dynamic Model Update to get and set those values.

private void Module_Startup(object sender, EventArgs e)
{
    AdaptivePointParamUpdater updater = new AdaptivePointParamUpdater(this.Application.ActiveAddInId);

    try
    {
    UpdaterRegistry.RegisterUpdater(updater);
    UpdaterRegistry.AddTrigger(updater.GetUpdaterId(), new ElementClassFilter(typeof(FamilyInstance)), Element.GetChangeTypeElementAddition());
    UpdaterRegistry.AddTrigger(updater.GetUpdaterId(), new ElementClassFilter(typeof(FamilyInstance)), Element.GetChangeTypeGeometry());
    }
    catch{}
}

public class AdaptivePointParamUpdater : IUpdater
{
    static AddInId m_appId;
    static UpdaterId m_updaterId;
    public AdaptivePointParamUpdater(AddInId id)
    {
        m_appId = id;
        m_updaterId = new UpdaterId(m_appId, new Guid("1BF1F6A2-4C06-42d4-97C1-D1B4EB593EFF"));
    }
    public void Execute(UpdaterData data)
    {
        Document doc = data.GetDocument();
        Autodesk.Revit.ApplicationServices.Application app = doc.Application;
        foreach (ElementId id in data.GetAddedElementIds())
        {
            adaptivePointParams(data.GetDocument(), id);
        }
        foreach (ElementId id in data.GetModifiedElementIds())
        {
            adaptivePointParams(data.GetDocument(), id);
        }
    }
    public string GetAdditionalInformation(){return "Data about adaptive parameters";}
    public ChangePriority GetChangePriority(){return ChangePriority.FloorsRoofsStructuralWalls;}
     public UpdaterId GetUpdaterId(){return m_updaterId;}
    public string GetUpdaterName(){return "AdaptivePoints";}

    private void adaptivePointParams(Document doc, ElementId id)
    {
        FamilyInstance fi = doc.GetElement(id) as FamilyInstance;
        if (fi != null && AdaptiveComponentInstanceUtils.IsAdaptiveComponentInstance(fi))
        {
            int ctr = 1;
            foreach (ElementId elementId in AdaptiveComponentInstanceUtils.GetInstancePlacementPointElementRefIds(fi))
            {
                ReferencePoint rp = doc.GetElement(elementId) as ReferencePoint;
                XYZ position = rp.Position;
                if (ctr == 1)
                {
                    fi.get_Parameter("point1x").Set(Math.Round(position.X,3));
                    fi.get_Parameter("point1y").Set(Math.Round(position.Y,3));
                    fi.get_Parameter("point1z").Set(Math.Round(position.Z,3));
                }
                else if (ctr == 2)
                {
                    fi.get_Parameter("point2x").Set(Math.Round(position.X,3));
                    fi.get_Parameter("point2y").Set(Math.Round(position.Y,3));
                    fi.get_Parameter("point2z").Set(Math.Round(position.Z,3));
                }                    
                ctr++;
            }
        }
    }        
}