public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
uidoc = uiapp.ActiveUIDocument;
Application app = uiapp.Application;
doc = uidoc.Document;
sel = uidoc.Selection;
Reference rf = sel.PickObject(ObjectType.Face, "Select Face");
Element ele = doc.GetElement(rf);
GeometryObject geoobject = ele.GetGeometryObjectFromReference(rf);
PlanarFace face = geoobject as PlanarFace;
Plane plane = face.Faceby3pointPlane();
XYZ direction = face.ComputeNormal(UV.Zero);
using (Transaction tran = new Transaction(doc, "Set view by face"))
{
tran.Start();
SketchPlane skt = SketchPlane.Create(doc, plane);
View3D view3d = doc.ActiveView as View3D;
view3d.OrientTo(plane.Normal);
doc.ActiveView.SketchPlane = skt;
uidoc.RefreshActiveView();
uidoc.ShowElements(ele.Id);
tran.Commit();
}
return(Result.Succeeded);
}
