protected override void SolveInstance(IGH_DataAccess DA) { Glulam glulam = null; if (!DA.GetData <Glulam>("Glulam", ref glulam)) { return; } int side = 0; DA.GetData("Side", ref side); Brep[] breps = glulam.GetGlulamFaces(side); DA.SetDataList("Faces", breps); }