Revit API元素镜像MirrorElement

这里涉及到一些专业术语Face,Plane,UV，还没搞清楚，暂时记录下来。

[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class cmdMirrorWall : IExternalCommand
{
    public Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet elements)
    {
        UIDocument uiDoc = cmdData.Application.ActiveUIDocument;

        Transaction ts = new Transaction(uiDoc.Document, "http://revit.5d6d.com");
        ts.Start();

        Reference reference = uiDoc.Selection.PickObject(ObjectType.Element, "选择一面墙");
        Wall wall = uiDoc.Document.GetElement(reference) as Wall;
        MirrorWall(uiDoc.Document, wall);

        ts.Commit();

        return Result.Succeeded;
    }
    private void MirrorWall(Document doc, Wall wall)
    {
        Reference reference = HostObjectUtils.GetSideFaces(wall, ShellLayerType.Exterior).First();
        Face face = wall.GetGeometryObjectFromReference(reference) as Face;
        UV bboxMin = face.GetBoundingBox().Min;
        Plane plane = new Plane(face.ComputeNormal(bboxMin), face.Evaluate(bboxMin).Add(new XYZ(10, 10, 0)));
        ElementTransformUtils.MirrorElement(doc, wall.Id, plane);
    }
}

from:http://revit.5d6d.com/thread-1274-1-1.html