Declare new Curve into C# script component

Grasshopper Developer
,
1

Hello,

I just faced a little issue trying to use the object Curve into C# script component.

I initialized a curve :

var tempCurve = new Curve();

and I get this error message:

1. Error (CS0122): ‘Rhino.Geometry.Curve.Curve(System.Runtime.Serialization.SerializationInfo, System.Runtime.Serialization.StreamingContext)’ is inaccessible due to its protection level (line 62)

Now, I see that the Class is Protected; what does it change? how can it be used?

Thanks for your help!

Giac

2

Curve is just the base class providing framework and functionality. Depending on the type of curve you want to create, there are many options:

  • Call a derived curve classes constructor, i.e. new NurbsCurve(…,…);
  • Call a static construction method: Curve.CreateControlPointCurve(…,…);
  • Create the curve from a different object, i.e. by duplicating the boundary of a surface or brep
  • Transform another object to a curve, i.e. Line line = new Line(ptA, ptB); then line.ToNurbsCurve()

etc…

3

https://developer.rhino3d.com/api/RhinoCommon/html/T_Rhino_Geometry_Curve.htm

1 Like
4

Thanks for the answer.

What I needed was to get some Curve objects as input and modify them in a for loop; then create a new Curve object to output.

In the meantime I managed to do it creating a NurbsCurve object from the Curve using a cast.

Giac