Offset open polycurve

mprades · July 2, 2015, 11:04am

Hello,
I want to get this figure,

from the following polycurve,

The command for get the figure form this polycurve is:

I am developing in c# and RhinnoCommon.

Someone knows how I can get it?

Thanks

enric · July 2, 2015, 1:54pm

Hi Miguel,

You can get the offset curve using the method Curve.Offset() http://4.rhino3d.com/5/rhinocommon/html/M_Rhino_Geometry_Curve_Offset_1.htm

Here is a sample:

github.com

mcneel/rhinocommon/blob/master/examples/wiki/offsetcurve.txt

===== offsetcurve =====

===== C# =====
<code c#>
public class OffsetCurveCommand : Command
{
  public override string EnglishName { get { return "csOffsetCurve"; } }

  protected override Result RunCommand(RhinoDoc doc, RunMode mode)
  {
    ObjRef obj_ref;
    var rs = RhinoGet.GetOneObject(
      "Select Curve", false, ObjectType.Curve, out obj_ref);
    if (rs != Result.Success)
      return rs;
    var curve = obj_ref.Curve();
    if (curve == null)
      return Result.Nothing;

    Point3d point;

This file has been truncated. show original

This function will give you a offset curve. Then you need to create a PolyCurve with both curves and two lines connecting both start and end points.

mprades · July 2, 2015, 3:21pm

Thank you very much Enric.

This is a good idea, in fact I use the following function:

Curve curvasOffset = curva.Offset(Plane.WorldXY, -10, 0.001, CurveOffsetCornerStyle.None)[0];

But, I want to know if there are anyway to do the figure with only one function of rhinocommon.

Thanks again, (Moltes gracies )

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Offset open polycurve

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