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);
}
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
Rhino.DocObjects.ObjRef obj_ref;
Result rc = Rhino.Input.RhinoGet.GetOneObject("Select curve", false, Rhino.DocObjects.ObjectType.Curve, out obj_ref);
if (rc != Result.Success)
{
return(rc);
}
Rhino.DocObjects.RhinoObject obj = obj_ref.Object();
if (null == obj)
{
return(Result.Failure);
}
obj_ref.Object().Select(false);
doc.Views.Redraw();
Rhino.Geometry.Curve crv = obj_ref.Curve();
if (null == crv)
{
return(Result.Failure);
}
Rhino.Input.Custom.GetPoint gp = new Rhino.Input.Custom.GetPoint();
gp.SetCommandPrompt("First point on curve");
gp.Constrain(crv, false);
gp.Get();
rc = gp.CommandResult();
if (rc != Result.Success)
{
return(rc);
}
double t0 = Rhino.RhinoMath.UnsetValue;
if (null == gp.PointOnCurve(out t0))
{
return(Result.Failure);
}
gp.SetCommandPrompt("Second point on curve");
gp.Get();
rc = gp.CommandResult();
if (rc != Result.Success)
{
return(rc);
}
double t1 = Rhino.RhinoMath.UnsetValue;
if (null == gp.PointOnCurve(out t1))
{
return(Result.Failure);
}
if (System.Math.Abs(t1 - t0) < Rhino.RhinoMath.ZeroTolerance)
{
return(Result.Failure);
}
if (crv.IsClosed || (!crv.IsClosed && t0 > t1))
{
double t = t0;
t0 = t1;
t1 = t;
}
Rhino.Geometry.Interval range = new Rhino.Geometry.Interval(t0, t1);
Rhino.Geometry.Curve subcrv = crv.Trim(range);
if (null != subcrv)
{
System.Guid id = doc.Objects.Add(subcrv);
obj = doc.Objects.Find(id);
if (null != obj)
{
obj.Select(true);
}
}
doc.Views.Redraw();
return(Result.Success);
}