PlaneClosestParameter Method

using System;
using Rhino.Geometry;

partial class Examples
{
  public static Rhino.Commands.Result AddLinearDimension2(Rhino.RhinoDoc doc)
  {
    Point3d origin = new Point3d(1,1,0);
    Point3d offset = new Point3d(11,1,0);
    Point3d pt = new Point3d((offset.X-origin.X)/2,3,0);

    Plane plane = Plane.WorldXY;
    plane.Origin = origin;

    double u,v;
    plane.ClosestParameter(origin, out u, out v);
    Point2d ext1 = new Point2d(u, v);

    plane.ClosestParameter(offset, out u, out v);
    Point2d ext2 = new Point2d(u, v);

    plane.ClosestParameter(pt, out u, out v);
    Point2d linePt = new Point2d(u, v);

    LinearDimension dimension = new LinearDimension(plane, ext1, ext2, linePt);
    if (doc.Objects.AddLinearDimension(dimension) != Guid.Empty)
    {
      doc.Views.Redraw();
      return Rhino.Commands.Result.Success;
    }
    return Rhino.Commands.Result.Failure;
  }
}

Imports Rhino.Geometry

Partial Class Examples
  Public Shared Function AddLinearDimension2(ByVal doc As Rhino.RhinoDoc) As Rhino.Commands.Result
    Dim origin As New Point3d(1, 1, 0)
    Dim offset As New Point3d(11, 1, 0)
    Dim pt As New Point3d((offset.X - origin.X) / 2, 3, 0)

    Dim plane__1 As Plane = Plane.WorldXY
    plane__1.Origin = origin

    Dim u As Double, v As Double
    plane__1.ClosestParameter(origin, u, v)
    Dim ext1 As New Point2d(u, v)

    plane__1.ClosestParameter(offset, u, v)
    Dim ext2 As New Point2d(u, v)

    plane__1.ClosestParameter(pt, u, v)
    Dim linePt As New Point2d(u, v)

    Dim dimension As New LinearDimension(plane__1, ext1, ext2, linePt)
    If doc.Objects.AddLinearDimension(dimension) <> Guid.Empty Then
      doc.Views.Redraw()
      Return Rhino.Commands.Result.Success
    End If
    Return Rhino.Commands.Result.Failure
  End Function
End Class

import Rhino
import scriptcontext
import System.Guid

def AddLinearDimension2():
    origin = Rhino.Geometry.Point3d(1,1,0)
    offset = Rhino.Geometry.Point3d(11,1,0)
    pt = Rhino.Geometry.Point3d((offset.X-origin.X)/2.0,3,0)
    plane = Rhino.Geometry.Plane.WorldXY
    plane.Origin = origin

    rc, u, v = plane.ClosestParameter(origin)
    ext1 = Rhino.Geometry.Point2d(u,v)
    rc, u, v = plane.ClosestParameter(offset)
    ext2 = Rhino.Geometry.Point2d(u,v)
    rc, u, v = plane.ClosestParameter(pt)
    linePt = Rhino.Geometry.Point2d(u,v)

    dimension = Rhino.Geometry.LinearDimension(plane, ext1, ext2, linePt)
    if scriptcontext.doc.Objects.AddLinearDimension(dimension)!=System.Guid.Empty:
        scriptcontext.doc.Views.Redraw()
        return Rhino.Commands.Result.Success
    return Rhino.Commands.Result.Failure

if __name__=="__main__":
    AddLinearDimension2()