WPFでのArcSegmentの中間点の取得方法

Question

パス内のArcSegmentの中点を取得してWPFでラベル付けするための最適なソリューションは何ですか？

Answer 1

これは動作するはずです：

 //the given arc (or any other segments) 
     var arc = new ArcSegment(
      point: new Point(200, 100), 
      size: new Size(100, 50), 
      rotationAngle: 90, 
      isLargeArc: true, 
      sweepDirection: SweepDirection.Counterclockwise, 
      isStroked: true); 

     //compose one or more segments into a collection 
     var pathcoll = new PathSegmentCollection(); 
     pathcoll.Add(arc); 

     //create a figure based on the set of segments 
     var figure = new PathFigure(); 
     figure.Segments = pathcoll; 

     //compose a collection of figures 
     var figcoll = new PathFigureCollection(); 
     figcoll.Add(figure); 

     //create a path-geometry using the figures collection 
     var geom = new PathGeometry(figcoll); 

     double fraction = 0.5; //the relative point of the curve 
     Point pt;    //the absolute point of the curve 
     Point tg;    //the tangent point of the curve 
     geom.GetPointAtFractionLength(
      fraction, 
      out pt, 
      out tg); 

はそれがお役に立てば幸いです。

乾杯