is it possible to exent the Rhinocommon sdk with custom classes?

Replies to This Discussion

Permalink Reply by David Rutten on May 5, 2012 at 3:23am

Hi Michael,

You can write extension methods, is that the sort of thing you were looking for? What exactly are you trying to accomplish?

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by michael sprinzl on May 5, 2012 at 4:36am

Hi David,

I have some functions and own libaries which I often use. I do not want to always attach them as assembly but simply have a kind of dummy .dll with exents the Rhinocommon.dll and the Rhino namespace.... somekind of playground which you can manipulate your way but is a standard part of rhinocommon.

Ah and what would be also very cool is a conduit which can be selected like a curve,brep etc. but does something totaly different (somethin you can modify) Till now I have a custom selector which is totally crap. I want to build a own contrained parametric sketcher for grasshopper. This is only some testing code.

I will send you something. As a idea....

  private void RunScript(List<GeometryBase> x, object y, ref object A, ref object B)
  {
    Rhino.Geometry.GeometryBase geobase_result;
    List<Rhino.Geometry.GeometryBase> geobase_ll = x;


    Point3d point = new Point3d(12, 12, 12);
    GetPointAtCursorPos(ref point, geobase_ll, out geobase_result);

    A = point;
    B = geobase_result;
  }

Custom additional code::

  [System.Runtime.InteropServices.DllImport("user32.dll")]
  public static extern bool GetCursorPos(out System.Drawing.Point pt);

  [System.Runtime.InteropServices.DllImport("user32.dll")]
  public static extern bool ScreenToClient(IntPtr hWnd, ref System.Drawing.Point pt);



  public static bool GetPointAtCursorPos(ref Point3d point, List<Rhino.Geometry.GeometryBase> geobase_in, out GeometryBase geobase_out)
  {
    geobase_out = null;
    bool rc = false;
    Rhino.Display.RhinoView view = RhinoDoc.ActiveDoc.Views.ActiveView;
    if (view != null)
    {
      System.Drawing.Point pt;

      if (GetCursorPos(out pt) && ScreenToClient(view.Handle, ref pt))
      {
        Transform xform = Transform.Unset;
        xform = view.ActiveViewport.GetTransform(Rhino.DocObjects.CoordinateSystem.Screen, Rhino.DocObjects.CoordinateSystem.World);
        point = new Point3d(pt.X, pt.Y, 0.0);
        point.Transform(xform);

        //


        Vector3d camera_vector = view.ActiveViewport.CameraDirection;
        Rhino.Geometry.Ray3d my_ray = new Rhino.Geometry.Ray3d(point, camera_vector);
        Line ray_line = new Line(my_ray.Position, my_ray.Direction * 2000000);
        Curve ray_curve = ray_line.ToNurbsCurve();
        int int_sel;
        Point3d pt_crv = Point3d.Unset;
        Point3d pt_obj = Point3d.Unset;

        ray_curve.ClosestPoints(geobase_in, out pt_crv, out pt_obj, out int_sel);

        if (theshold() > pt_crv.DistanceTo(pt_obj))
        {
          geobase_out = geobase_in[int_sel];
        }

        else {geobase_out = null;}
        //


        rc = true;
      }
    }
    return rc;
  }


  public static double theshold()
  {
    Point3d[] rec_pt = RhinoDoc.ActiveDoc.Views.ActiveView.ActiveViewport.GetNearRect();

    double aspect = rec_pt[0].DistanceTo(rec_pt[2]);
    return aspect / 100;
  }

Permalink Reply by David Rutten on May 6, 2012 at 12:06pm

If you want to use types and methods defined in a specific assembly, you must reference that assembly at compiletime. You could do these things via reflection or dynamic, but it's going to be a major pain in the behind real soon compared to proper referenced assemblies.

--

David Rutten

david@mcneel.com

Poprad, Slovakia