/// <summary> /// This is the method that actually does the work. /// </summary> /// <param name="DA">The DA object can be used to retrieve data from input parameters and /// to store data in output parameters.</param> protected override void SolveInstance(IGH_DataAccess DA) { IntPtr topoData = IntPtr.Zero; if (!DA.GetData(0, ref topoData)) { return; } List <Polyline> polylines = new List <Polyline>(); IntPtr baseMesh2D = TopoCreator.initBaseMesh2DPtr(topoData); TopoCreator.getPolyLines(polylines, baseMesh2D, false); TopoCreator.deletePolyLineRhino(baseMesh2D); DA.SetDataList(0, polylines); }