ArcSegment的旋转和方向

问题描述：

有没有办法让ArcSegment在特定的方向绘制？据我所知，它总是从上到下。例如，我有一个ArcSegment，其中在180度（270度为北）时开始，并将几乎椭圆绘制到180度。现在，绘图顺时针从....顺便说一句，对不起，让我给你看看。ArcSegment的旋转和方向

things

左边的一个是我从一个转换设定值接收的值，但我需要它像右边的一个行动。

<Canvas Background="#FDB" Width="720" Height="540"> 
    <Path Canvas.Left="100" Canvas.Top="100" Stroke="#385D8A" StrokeThickness="2" StrokeLineJoin="Round" Fill="#4F81BD"> 
    <!-- this is the LEFT shape that I need drawn like the other one --> 
    <Path.Data> 
     <GeometryGroup> 
     <PathGeometry> 
      <PathGeometry.Figures> 
      <PathFigure StartPoint="0,51" IsClosed="True"> 
       <PathFigure.Segments> 
       <LineSegment Point="51,51" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      <PathFigure StartPoint="25.5,0"> 
       <PathFigure.Segments> 
       <LineSegment Point="25.5,102" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      <PathFigure StartPoint="25.5,51" IsClosed="True" > 
       <PathFigure.Segments> 
       <ArcSegment Size="25.5,25.5" IsLargeArc="True" SweepDirection="Clockwise" Point="25.49,51" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      </PathGeometry.Figures> 
     </PathGeometry> 
     </GeometryGroup> 
    </Path.Data> 
    </Path> 
    <Path Canvas.Left="200" Canvas.Top="100" Stroke="#385D8A" StrokeThickness="2" StrokeLineJoin="Round" Fill="#4F81BD"> 
    <!-- this is the RIGHT shape, the way it should behave, but notice the different StartPoint and Point --> 
    <Path.Data> 
     <GeometryGroup> 
     <PathGeometry> 
      <PathGeometry.Figures> 
      <PathFigure StartPoint="0,51" IsClosed="True"> 
       <PathFigure.Segments> 
       <LineSegment Point="51,51" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      <PathFigure StartPoint="25.5,0"> 
       <PathFigure.Segments> 
       <LineSegment Point="25.5,102" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      <PathFigure StartPoint="51,25.5" IsClosed="True" > 
       <PathFigure.Segments> 
       <ArcSegment Size="25.5,25.5" IsLargeArc="True" SweepDirection="Clockwise" Point="50.99,25.5" /> 
       </PathFigure.Segments> 
      </PathFigure> 
      </PathGeometry.Figures> 
     </PathGeometry> 
     </GeometryGroup> 
    </Path.Data> 
    </Path> 
</Canvas>

我试着RotationAngle玩弄左右，但似乎并没有产生任何影响，因为它仅适用于X轴，而不是Y轴。

第一个Path的值来自转换例程，所以并不是我可以轻松修改它们。

答

我想我已经想通了 - 只需要缩短Y轴而不是X轴。所以：

<PathFigure StartPoint="51,25.5" IsClosed="True" > 
    <PathFigure.Segments> 
     <ArcSegment Point="50.99,25.5" Size="25.5,25.5" IsLargeArc="True" SweepDirection="Clockwise" /> 
    </PathFigure.Segments> 
</PathFigure>

应该是：

<PathFigure StartPoint="51,25.5" IsClosed="True" > 
    <PathFigure.Segments> 
     <ArcSegment Point="51,24.99" Size="25.5,25.5" IsLargeArc="True" SweepDirection="Clockwise" /> 
    </PathFigure.Segments> 
</PathFigure>

至于这么简单。

ArcSegment的旋转和方向

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