Error accessing object data using RhinoGH Converters

chuck · 4 July 2023 15:46

Howdy, I’m back and working again on using the existing RhinoGh converters. I’ve managed to resolve my earlier issue with being able to import and invoke the code.

BUT, now I’m not sure I’m using it right. Is there some setup/config I need to do outside of new ConverterRhinoGh() in order to call ConvertToSpeckle() (or similar?).

(forgive the sloppy C#) For example, this code always returns null for a valid Rhino Circle:

github.com

nodepen/nodes/blob/e0ec55388e3959b56877d484f0d71c3e1427acd4/apps/rhino-compute-server/Kits/NodePenRhinoConverter.cs#L60


      
            return output;
          }
          
          
public List<Base> ConvertToSpeckle(List<object> objects)
          {
            return BaseConverter.ConvertToSpeckle(objects);
          }
          
          
public Base ConvertToSpeckle(object @object)
          {
            Base el = BaseConverter.ConvertToSpeckle(@object);
            Console.WriteLine("Speckle result:");
            Console.WriteLine(el);
          
          
  return el;
          }
          
          
public IEnumerable<string> GetServicedApplications()
          {
            return BaseConverter.GetServicedApplications();
          }

And this code throws a classic “object reference not set to an instance of an object” in [External Code]:

github.com

nodepen/nodes/blob/e0ec55388e3959b56877d484f0d71c3e1427acd4/apps/rhino-compute-server/Endpoints/GrasshopperEndpoints.cs#L195


      
          Geometry.Circle circle = circleGoo.Value;
          
          
Console.WriteLine(JsonConvert.SerializeObject(circle));
          
          
var res = converter.ConvertToSpeckle(circle);
          
          
Console.WriteLine(JsonConvert.SerializeObject(res));
          
          
var baseConverter = new ConverterRhinoGh();
          
          
var circleRes = baseConverter.CircleToSpeckle(circle);
          Console.WriteLine("Circle res:");
          Console.WriteLine(circleRes);
          Console.WriteLine(JsonConvert.SerializeObject(circleRes));
          
          
NodePenDataTreeValue entrySolutionData = new NodePenDataTreeValue()
          {
            Type = "circle"
          };
          
          
entrySolutionData["Value"] = res;

The object in question always passes CanConvertToSpeckle, if that helps.

teocomi · 4 July 2023 15:50

You might need to call converter.SetContextDocument(Doc)

See: speckle-sharp/ConnectorRhino/ConnectorRhino/ConnectorRhinoShared/UI/ConnectorBindingsRhino.cs at 15f0a8c516b19ae86a6777bd68fcafb2a9ebf29a · specklesystems/speckle-sharp · GitHub

chuck · 4 July 2023 20:58

That was it, thank you mountains!

Nothing thrilling yet, but that’s a speckle circle we’re looking at. A few things to wrap my head around (units, C# business, detch-or-not) but the important loop has been figured out and everything feels possible.

teocomi · 5 July 2023 04:44

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