public static Rhino.Commands.Result InsertKnot(Rhino.RhinoDoc doc)
{
const ObjectType filter = Rhino.DocObjects.ObjectType.Curve;
Rhino.DocObjects.ObjRef objref;
Result rc = Rhino.Input.RhinoGet.GetOneObject("Select curve for knot insertion", false, filter, out objref);
if (rc != Rhino.Commands.Result.Success)
return rc;
Rhino.Geometry.Curve curve = objref.Curve();
if (null == curve)
return Rhino.Commands.Result.Failure;
Rhino.Geometry.NurbsCurve nurb = curve.ToNurbsCurve();
if (null == nurb)
return Rhino.Commands.Result.Failure;
Rhino.Input.Custom.GetPoint gp = new Rhino.Input.Custom.GetPoint();
gp.SetCommandPrompt("Point on curve to add knot");
gp.Constrain(nurb, false);
gp.Get();
if (gp.CommandResult() == Rhino.Commands.Result.Success)
{
double t;
Rhino.Geometry.Curve crv = gp.PointOnCurve(out t);
if( crv!=null && nurb.Knots.InsertKnot(t) )
{
doc.Objects.Replace(objref, nurb);
doc.Views.Redraw();
}
}
return Rhino.Commands.Result.Success;
}
