Animating A Polygon?

Question

Hi

I have a polygon made up of a PointCollection...Is there any way to animate the points as a group?  I tried to name the points and animated them individually, but naming points is not allowed.

Answer 1

You can either dot down to the points using TargetPath, or convert the Polygon over to a Path containing a PathGeometry:

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Canvas.Triggers>
      <EventTrigger RoutedEvent="Canvas.Loaded">
<BeginStoryboard>
          <Storyboard>
            <PointAnimation
   By="-20,-20"
   Duration="0:0:2"
   RepeatBehavior="Forever"
   AutoReverse="True"
   Storyboard.TargetName="figure1"
   Storyboard.TargetProperty="StartPoint"/>
            <PointAnimation
   By="40,40"
   Duration="0:0:2"
   RepeatBehavior="Forever"
   AutoReverse="True"
   Storyboard.TargetName="segment1"
   Storyboard.TargetProperty="Point"/>
  <PointAnimation
   By="50,40"
   Duration="0:0:2"
   RepeatBehavior="Forever"
   AutoReverse="True"
   Storyboard.TargetName="segment2"
   Storyboard.TargetProperty="Point"/>
              <PointAnimation
   By="-20,30"
   Duration="0:0:2"
   RepeatBehavior="Forever"
   AutoReverse="True"
   Storyboard.TargetName="segment3"
   Storyboard.TargetProperty="Point"/>
   
       </Storyboard>
</BeginStoryboard>
 </EventTrigger>
    </Canvas.Triggers>

<Path Name="path" Fill="#20000000">
  <Path.Data>
    <PathGeometry>
      <PathGeometry.Figures>
        <PathFigureCollection>
          <PathFigure x:Name="figure1" IsFilled="True" StartPoint="10, 100">
            <PathFigure.Segments>
              <PathSegmentCollection>
                   <LineSegment x:Name="segment1" Point="20, 20" />   
                   <LineSegment x:Name="segment2" Point="90, 100" />
                   <LineSegment x:Name="segment3" Point="90, 200" />
              </PathSegmentCollection>
            </PathFigure.Segments>
          </PathFigure>
        </PathFigureCollection>
      </PathGeometry.Figures>
    </PathGeometry>
  </Path.Data>
</Path>
</Canvas>