source: branches/HeuristicLab.Problems.GrammaticalOptimization/SharpVectorModel/Paths/SvgPathSegClosePath.cs @ 13005

using System;

namespace SharpVectors.Dom.Svg
{
  /// <summary>
  /// Summary description for SvgPathSegClosePath.
  /// </summary>
  public sealed class SvgPathSegClosePath : SvgPathSeg, ISvgPathSegClosePath
  {
    internal SvgPathSegClosePath() : base(SvgPathSegType.ClosePath)
    {
    }

        public override SvgPointF AbsXY
    {
      get
      {
        SvgPathSeg item = this;
      
        while(item != null && !(item is SvgPathSegMoveto))
        {
          item = item.PreviousSeg;
        }

        if(item == null)
        {
                    return new SvgPointF(0, 0);
        }
        else
        {
          return item.AbsXY;
        }
      }
    }

        public override double StartAngle
    {
      get
      {
        SvgPathSeg prevSeg = PreviousSeg;
                SvgPointF prevPoint;
        if(prevSeg == null)
        {
                    prevPoint = new SvgPointF(0, 0);
        }
        else
        {
          prevPoint = prevSeg.AbsXY;
        }
                SvgPointF curPoint = AbsXY;

                double dx = curPoint.X - prevPoint.X;
                double dy = curPoint.Y - prevPoint.Y;

                double a = (Math.Atan2(dy, dx) * 180 / Math.PI);
        a += 270;
        a %= 360;
        return a;
      }
    }

        public override double EndAngle
    {
      get
      {
                double a = StartAngle;
        a += 180;
        a %= 360;
        return a;
      }
    }

    public override string PathText
    {
      get
      {
        return "z";
      }
    }
  }
}