protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
ObjRef obj_ref;
const string prompt = "Select curve to edit";
const ObjectType object_type = ObjectType.Curve;
Result res = RhinoGet.GetOneObject(prompt, false, object_type, out obj_ref);
if (res != Result.Success)
{
return(res);
}
Curve crv = obj_ref.Curve();
if (null == crv)
{
return(Result.Failure);
}
GetPoint gp = new GetPoint();
gp.SetCommandPrompt("Start point for deletion");
gp.Constrain(crv, false);
gp.Get();
if (gp.CommandResult() != Result.Success)
{
return(gp.CommandResult());
}
double t0 = RhinoMath.UnsetValue;
Curve out_crv = gp.PointOnCurve(out t0);
if (null == out_crv)
{
return(Result.Failure);
}
gp.SetCommandPrompt("End point for deletion");
gp.Get();
if (gp.CommandResult() != Result.Success)
{
return(gp.CommandResult());
}
double t1 = RhinoMath.UnsetValue;
out_crv = gp.PointOnCurve(out t1);
if (null == out_crv)
{
return(Result.Failure);
}
if (Math.Abs(t1 - t0) < RhinoMath.ZeroTolerance)
{
return(Result.Nothing);
}
Interval range = new Interval(t0, t1);
if (!crv.IsClosed && range.IsDecreasing)
{
range.Swap();
}
Curve sub_crv = crv.Trim(crv.Domain.Min, range.Min);
if (null != sub_crv)
{
doc.Objects.AddCurve(sub_crv);
}
sub_crv = crv.Trim(range.Max, crv.Domain.Max);
if (null != sub_crv)
{
doc.Objects.AddCurve(sub_crv);
}
doc.Objects.Delete(obj_ref, true);
doc.Views.Redraw();
return(Result.Success);
}