How to create NURBS surface from my own class?

Grasshopper Developer
,
1

Hi, everyone! I have a problem that I can’t solve on my own. So, there is my own class as a shell for Rhino.Geometry.NurbsSurface:

public class MySurface {
    public Rhino.Geometry.NurbsSurface rhinoSurface;
    public double[][] mX = MatrixCreate(6, 6);
    public double[][] mY = MatrixCreate(6, 6);
    public double[][] mZ = MatrixCreate(6, 6);
    public MySurface(Rhino.Geometry.NurbsSurface SurfaceA)
    {
      this.rhinoSurface = SurfaceA;
      for (int u = 0; u < SurfaceA.Points.CountU; u++)
      {
        for (int v = 0; v < SurfaceA.Points.CountV; v++)
        {
          mX[u][v] = SurfaceA.Points.GetControlPoint(u, v).X;
          mY[u][v] = SurfaceA.Points.GetControlPoint(u, v).Y;
          mZ[u][v] = SurfaceA.Points.GetControlPoint(u, v).Z;
        }
      }
    }
    //create surface with the array of control vertices
    public void CreateSurfaceByCVSet(MySurface surface)
    {
      const bool is_rational = false;
      const int number_of_dimensions = 3;
      int maxU = 5;
      int maxV = 5;

      int u_degree = 5;
      int v_degree = 5;
      int u_control_point_count = u_degree + 1;
      int v_control_point_count = v_degree + 1;

      double[][] CVsetX = this.mX;
      double[][] CVSetY = this.mY;
      double[][] CVSetZ = this.mZ;

      var control_points = new Point3d[u_control_point_count, v_control_point_count];
      for (int u = 0; u < maxU + 1; u++)
      {
        for (int v = 0; v < maxV + 1; v++)
        {
          control_points[u, v] = new Point3d(CVsetX[u][v], CVSetY[u][v], CVSetZ[u][v]);
        }
      }

      var nurbs_surface = NurbsSurface.Create(
        number_of_dimensions,
        is_rational,
        u_degree + 1,
        v_degree + 1,
        u_control_point_count,
        v_control_point_count
        );

      nurbs_surface.KnotsU.CreateUniformKnots(1);
      nurbs_surface.KnotsV.CreateUniformKnots(1);


      // add the control points
      for (int u = 0; u < nurbs_surface.Points.CountU; u++)
      {
        for (int v = 0; v < nurbs_surface.Points.CountV; v++)
        {
          nurbs_surface.Points.SetPoint(u, v, control_points[u, v]);
        }
      }

      if (nurbs_surface.IsValid)
      {
        doc.Objects.AddSurface(nurbs_surface);
        doc.Views.Redraw();
      }
    }
  }

But when I try to use this code within my C# component, I get an error: “Cannon access a non-static member of outer type ‘Script _Instance’ via nested type Script_Instance.MySurface”. So, I understand that I cannot use Rhino’s methods from my own classes. I can’t even use Print function… For ex.,

   public class MyClass
  {
    public void TestFoo()
    {
      Print("it works!");
    }
  }

Can you please help me to fix this problem? Thanks.

2

Sorry for poor formatting, I’m very newbie in this forum, and indeed…