RhinoObject.ToJSON returns null

Rhino Developer
,
1

Hello,

I am trying to serialize some RhinoObject with the ToJSON method.
If I use it on RhinoObject.Geometry and RhinoObject.Attributes it returns correct string.
If the method is used on the RhinoObject itselft it returns null?

Is that correct behavior or I am missing something?

Code sample is simple:

  protected override Result RunCommand(RhinoDoc doc, RunMode mode)
  {
      try
      {
          RhinoObject brep = doc.Objects.First();

          if (brep == null)
          {
              RhinoApp.WriteLine("No Brep found.");
              return Result.Failure;
          }
          else
          {
                                           
              Rhino.FileIO.SerializationOptions options = new Rhino.FileIO.SerializationOptions();
              options.WriteUserData = true;


              // This always return null
              var serializedRhinoObject = brep.ToJSON(options);


              // This does work...
              Dictionary<string, string> jsonDictGeom = JsonConvert.DeserializeObject<Dictionary<string, string>>(brep.ToJSON(options));
              Dictionary<string, string> jsonDictAttribute = JsonConvert.DeserializeObject<Dictionary<string, string>>(brep.Attributes.ToJSON(options));

              // Nefunguje pro RhinoObject => Discourse napsat....

              Brep newbrep = CommonObject.FromJSON(jsonDictGeom) as Brep;
              ObjectAttributes attributes = CommonObject.FromJSON(jsonDictAttribute) as ObjectAttributes;
              doc.Objects.Add(newbrep, attributes);

              return Result.Success;
          }
      }
      catch (Exception ex)
      {
          RhinoApp.WriteLine("Exception: " + ex.Message);
          return Result.Failure;
      }
  }

Thanks for any reply.

Ondřej

2

Hi @janotaondrej91,

RhinoObject is a runtime object and never serialized to .3dm files.

– Dale

3

Thanks for the reply @dale