PathAnimation

使用Blend制作PathAnimation

1：选中Path转换为运动路径

2：选择目标对象

PathAnimation使用动态的Path

PathAnimation动画在播放的时候，PahtGeometry是已经确定的，不会改变，不会实时的根据Path的改变动画进行调整，所以是不能进行绑定

只有在每一次需要播放动画之前读取相关的Path的Data，读取当前的PathGeometry然后开始动画

    <Path x:Name="path" Stroke="DarkGray" StrokeThickness="3">
             <Path.Data>
                 <PathGeometry>
                     <PathFigure
                         StartPoint="{Binding Center, ElementName=ptStart}">
                         <BezierSegment
                             Point1="{Binding Center, ElementName=ptCtrl1}"
                             Point2="{Binding Center, ElementName=ptCtrl2}"
                             Point3="{Binding Center, ElementName=ptEnd}"/>
                     </PathFigure>
                 </PathGeometry>
             </Path.Data>
         </Path>

  private void Button_Click(object sender, RoutedEventArgs e)
         {
             Canvas.SetLeft(this.truck, -this.truck.ActualWidth / );
             Canvas.SetTop(this.truck, -this.truck.ActualHeight / );
             this.truck.RenderTransformOrigin = new Point(0.5, 0.5);

             MatrixTransform matrix = new MatrixTransform();
             this.truck.RenderTransform = matrix;

             NameScope.SetNameScope(this, new NameScope());
             this.RegisterName("matrix", matrix);

             MatrixAnimationUsingPath matrixAnimation = new MatrixAnimationUsingPath();
             matrixAnimation.PathGeometry = this.path.Data.GetFlattenedPathGeometry();
             matrixAnimation.Duration = new Duration(TimeSpan.FromSeconds());

             //matrixAnimation.AutoReverse = true;   //重复
             //matrixAnimation.IsOffsetCumulative = !matrixAnimation.AutoReverse;
             //matrixAnimation.RepeatBehavior = RepeatBehavior.Forever;
             matrixAnimation.DoesRotateWithTangent = false;   //旋转

             Storyboard story = new Storyboard();
             story.Children.Add(matrixAnimation);
             Storyboard.SetTargetName(matrixAnimation, "matrix");
             Storyboard.SetTargetProperty(matrixAnimation, new PropertyPath(MatrixTransform.MatrixProperty));
             story.Begin(this);
         }