Windows 8/8.1/10 加载动画WPF实现

<UserControl x:Class="ModernShow.CircleLoader"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:sys="clr-namespace:System;assembly=mscorlib">
    <Grid>
        <Grid.Resources>
            <SolidColorBrush x:Key="ParticleColor" Color = "White"/>
            <SolidColorBrush x:Key="ParticleBackgroundColor" Color = "Transparent"/>
            <sys:Double x:Key="ParticleOpacity">1</sys:Double>
            <sys:Double x:Key="ParticleRadius">5</sys:Double>

            <sys:Double x:Key="StartingPointX">0</sys:Double>
            <sys:Double x:Key="StartingPointY">-18</sys:Double>

            <sys:Double x:Key="RotationPointX">0.5</sys:Double>
            <sys:Double x:Key="RotationPointY">0.5</sys:Double>

            <sys:TimeSpan x:Key="StoryBoardBeginTimeP0">00:00:00.000</sys:TimeSpan>
            <sys:TimeSpan x:Key="StoryBoardBeginTimeP1">00:00:00.100</sys:TimeSpan>
            <sys:TimeSpan x:Key="StoryBoardBeginTimeP2">00:00:00.200</sys:TimeSpan>
            <sys:TimeSpan x:Key="StoryBoardBeginTimeP3">00:00:00.300</sys:TimeSpan>
            <sys:TimeSpan x:Key="StoryBoardBeginTimeP4">00:00:00.400</sys:TimeSpan>
            <Duration x:Key="StoryBoardDuration">00:00:03.500</Duration>

            <sys:Double x:Key="ParticleOriginAngleP0">0</sys:Double>
            <sys:Double x:Key="ParticleOriginAngleP1">-15</sys:Double>
            <sys:Double x:Key="ParticleOriginAngleP2">-30</sys:Double>
            <sys:Double x:Key="ParticleOriginAngleP3">-45</sys:Double>
            <sys:Double x:Key="ParticleOriginAngleP4">-60</sys:Double>

            <sys:Double x:Key="ParticleBeginAngle1">0</sys:Double>
            <sys:Double x:Key="ParticleEndAngle1">90</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime1">00:00:00.000</sys:TimeSpan>
            <Duration x:Key="ParticleDuration1">00:00:00.750</Duration>

            <sys:Double x:Key="ParticleBeginAngle2">90</sys:Double>
            <sys:Double x:Key="ParticleEndAngle2">270</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime2">00:00:00.751</sys:TimeSpan>
            <Duration x:Key="ParticleDuration2">00:00:00.500</Duration>

            <sys:Double x:Key="ParticleBeginAngle3">270</sys:Double>
            <sys:Double x:Key="ParticleEndAngle3">360</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime3">00:00:01.252</sys:TimeSpan>
            <Duration x:Key="ParticleDuration3">00:00:00.750</Duration>

            <sys:Double x:Key="ParticleBeginAngle4">0</sys:Double>
            <sys:Double x:Key="ParticleEndAngle4">180</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime4">00:00:02.03</sys:TimeSpan>
            <Duration x:Key="ParticleDuration4">00:00:00.450</Duration>

            <sys:Double x:Key="ParticleBeginOpacity6">1</sys:Double>
            <sys:Double x:Key="ParticleEndOpacity6">0</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime6">00:00:02.353</sys:TimeSpan>
            <Duration x:Key="ParticleDuration6">00:00:00.040</Duration>

            <sys:Double x:Key="ParticleBeginOpacity7">0</sys:Double>
            <sys:Double x:Key="ParticleEndOpacity7">1</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime7">00:00:02.900</sys:TimeSpan>
            <Duration x:Key="ParticleDuration7">00:00:00.020</Duration>

            <sys:Double x:Key="ParticleBeginAngle5">180</sys:Double>
            <sys:Double x:Key="ParticleEndAngle5">360</sys:Double>
            <sys:TimeSpan x:Key="ParticleBeginTime5">00:00:02.900</sys:TimeSpan>
            <Duration x:Key="ParticleDuration5">00:00:00.600</Duration>

            <Style x:Key="EllipseStyle" TargetType="Ellipse">
                <Setter Property="Width" Value="{StaticResource ParticleRadius}"/>
                <Setter Property="Height" Value="{StaticResource ParticleRadius}"/>
                <Setter Property="Fill" Value="{StaticResource ParticleColor}"/>
                <Setter Property="RenderTransformOrigin" Value="0.5, 0.5"/>
                <Setter Property="Opacity" Value="{StaticResource ParticleOpacity}"/>
            </Style>
        </Grid.Resources>
        
        <Grid Width="50" Height="50">
            <Grid.Triggers>
                <EventTrigger RoutedEvent="Canvas.Loaded">
                    <EventTrigger.Actions>
                        <BeginStoryboard>
                            <Storyboard BeginTime="{StaticResource StoryBoardBeginTimeP0}" 
                                        Duration="{StaticResource StoryBoardDuration}"
                                        RepeatBehavior="Forever">
                                <DoubleAnimation Storyboard.TargetName="p0" 
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle1}"
                                                 To="{StaticResource ParticleEndAngle1}"
                                                 BeginTime="{StaticResource ParticleBeginTime1}"
                                                 Duration="{StaticResource ParticleDuration1}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle2}"
                                                 To ="{StaticResource ParticleEndAngle2}"
                                                 BeginTime="{StaticResource ParticleBeginTime2}"
                                                 Duration="{StaticResource ParticleDuration2}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle3}"
                                                 To="{StaticResource ParticleEndAngle3}"
                                                 BeginTime="{StaticResource ParticleBeginTime3}"
                                                 Duration="{StaticResource ParticleDuration3}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle4}"
                                                 To="{StaticResource ParticleEndAngle4}"
                                                 BeginTime="{StaticResource ParticleBeginTime4}"
                                                 Duration="{StaticResource ParticleDuration4}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle5}"
                                                 To="{StaticResource ParticleEndAngle5}"
                                                 BeginTime="{StaticResource ParticleBeginTime5}"
                                                 Duration="{StaticResource ParticleDuration5}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity6}"
                                                 To="{StaticResource ParticleEndOpacity6}"
                                                 BeginTime="{StaticResource ParticleBeginTime6}"
                                                 Duration="{StaticResource ParticleDuration6}"/>
                                <DoubleAnimation Storyboard.TargetName="p0"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity7}"
                                                 To="{StaticResource ParticleEndOpacity7}"
                                                 BeginTime="{StaticResource ParticleBeginTime7}"
                                                 Duration="{StaticResource ParticleDuration7}"/>
                            </Storyboard>
                        </BeginStoryboard>
                        <BeginStoryboard>
                            <Storyboard BeginTime="{StaticResource StoryBoardBeginTimeP1}" 
                                        Duration="{StaticResource StoryBoardDuration}"
                                        RepeatBehavior="Forever">
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle1}"
                                                 To="{StaticResource ParticleEndAngle1}"
                                                 BeginTime="{StaticResource ParticleBeginTime1}"
                                                 Duration="{StaticResource ParticleDuration1}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle2}"
                                                 To="{StaticResource ParticleEndAngle2}"
                                                 BeginTime="{StaticResource ParticleBeginTime2}"
                                                 Duration="{StaticResource ParticleDuration2}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle3}"
                                                 To="{StaticResource ParticleEndAngle3}"
                                                 BeginTime="{StaticResource ParticleBeginTime3}"
                                                 Duration="{StaticResource ParticleDuration3}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle4}"
                                                 To="{StaticResource ParticleEndAngle4}"
                                                 BeginTime="{StaticResource ParticleBeginTime4}"
                                                 Duration="{StaticResource ParticleDuration4}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle5}"
                                                 To="{StaticResource ParticleEndAngle5}"
                                                 BeginTime="{StaticResource ParticleBeginTime5}"
                                                 Duration="{StaticResource ParticleDuration5}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity6}"
                                                 To="{StaticResource ParticleEndOpacity6}"
                                                 BeginTime="{StaticResource ParticleBeginTime6}"
                                                 Duration="{StaticResource ParticleDuration6}"/>
                                <DoubleAnimation Storyboard.TargetName="p1"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity7}"
                                                 To="{StaticResource ParticleEndOpacity7}"
                                                 BeginTime="{StaticResource ParticleBeginTime7}"
                                                 Duration="{StaticResource ParticleDuration7}"/>
                            </Storyboard>
                        </BeginStoryboard>
                        <BeginStoryboard>
                            <Storyboard BeginTime="{StaticResource StoryBoardBeginTimeP2}"
                                        Duration="{StaticResource StoryBoardDuration}"
                                        RepeatBehavior="Forever">
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle1}"
                                                 To="{StaticResource ParticleEndAngle1}"
                                                 BeginTime="{StaticResource ParticleBeginTime1}"
                                                 Duration="{StaticResource ParticleDuration1}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle2}"
                                                 To="{StaticResource ParticleEndAngle2}"
                                                 BeginTime="{StaticResource ParticleBeginTime2}"
                                                 Duration="{StaticResource ParticleDuration2}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle3}"
                                                 To="{StaticResource ParticleEndAngle3}"
                                                 BeginTime="{StaticResource ParticleBeginTime3}"
                                                 Duration="{StaticResource ParticleDuration3}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle4}"
                                                 To="{StaticResource ParticleEndAngle4}"
                                                 BeginTime="{StaticResource ParticleBeginTime4}"
                                                 Duration="{StaticResource ParticleDuration4}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle5}"
                                                 To="{StaticResource ParticleEndAngle5}"
                                                 BeginTime="{StaticResource ParticleBeginTime5}"
                                                 Duration="{StaticResource ParticleDuration5}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity6}"
                                                 To="{StaticResource ParticleEndOpacity6}"
                                                 BeginTime="{StaticResource ParticleBeginTime6}"
                                                 Duration="{StaticResource ParticleDuration6}"/>
                                <DoubleAnimation Storyboard.TargetName="p2"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity7}"
                                                 To="{StaticResource ParticleEndOpacity7}"
                                                 BeginTime="{StaticResource ParticleBeginTime7}"
                                                 Duration="{StaticResource ParticleDuration7}"/>
                            </Storyboard>
                        </BeginStoryboard>
                        <BeginStoryboard>
                            <Storyboard BeginTime="{StaticResource StoryBoardBeginTimeP3}"
                                        Duration="{StaticResource StoryBoardDuration}"
                                        RepeatBehavior="Forever">
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle1}"
                                                 To="{StaticResource ParticleEndAngle1}"
                                                 BeginTime="{StaticResource ParticleBeginTime1}"
                                                 Duration="{StaticResource ParticleDuration1}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle2}"
                                                 To="{StaticResource ParticleEndAngle2}"
                                                 BeginTime="{StaticResource ParticleBeginTime2}"
                                                 Duration="{StaticResource ParticleDuration2}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle3}"
                                                 To="{StaticResource ParticleEndAngle3}"
                                                 BeginTime="{StaticResource ParticleBeginTime3}"
                                                 Duration="{StaticResource ParticleDuration3}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle4}"
                                                 To="{StaticResource ParticleEndAngle4}"
                                                 BeginTime="{StaticResource ParticleBeginTime4}"
                                                 Duration="{StaticResource ParticleDuration4}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle5}"
                                                 To="{StaticResource ParticleEndAngle5}"
                                                 BeginTime="{StaticResource ParticleBeginTime5}"
                                                 Duration="{StaticResource ParticleDuration5}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity6}"
                                                 To="{StaticResource ParticleEndOpacity6}"
                                                 BeginTime="{StaticResource ParticleBeginTime6}"
                                                 Duration="{StaticResource ParticleDuration6}"/>
                                <DoubleAnimation Storyboard.TargetName="p3"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity7}"
                                                 To="{StaticResource ParticleEndOpacity7}"
                                                 BeginTime="{StaticResource ParticleBeginTime7}"
                                                 Duration="{StaticResource ParticleDuration7}"/>
                            </Storyboard>
                        </BeginStoryboard>
                        <BeginStoryboard>
                            <Storyboard BeginTime="{StaticResource StoryBoardBeginTimeP4}"
                                        Duration="{StaticResource StoryBoardDuration}"
                                        RepeatBehavior="Forever">
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle1}"
                                                 To="{StaticResource ParticleEndAngle1}"
                                                 BeginTime="{StaticResource ParticleBeginTime1}"
                                                 Duration="{StaticResource ParticleDuration1}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle2}"
                                                 To="{StaticResource ParticleEndAngle2}"
                                                 BeginTime="{StaticResource ParticleBeginTime2}"
                                                 Duration="{StaticResource ParticleDuration2}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle3}"
                                                 To="{StaticResource ParticleEndAngle3}"
                                                 BeginTime="{StaticResource ParticleBeginTime3}"
                                                 Duration="{StaticResource ParticleDuration3}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle4}"
                                                 To="{StaticResource ParticleEndAngle4}"
                                                 BeginTime="{StaticResource ParticleBeginTime4}"
                                                 Duration="{StaticResource ParticleDuration4}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                                 From="{StaticResource ParticleBeginAngle5}"
                                                 To="{StaticResource ParticleEndAngle5}"
                                                 BeginTime="{StaticResource ParticleBeginTime5}"
                                                 Duration="{StaticResource ParticleDuration5}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity6}"
                                                 To="{StaticResource ParticleEndOpacity6}"
                                                 BeginTime="{StaticResource ParticleBeginTime6}"
                                                 Duration="{StaticResource ParticleDuration6}"/>
                                <DoubleAnimation Storyboard.TargetName="p4"
                                                 Storyboard.TargetProperty="(UIElement.Opacity)"
                                                 From="{StaticResource ParticleBeginOpacity7}"
                                                 To="{StaticResource ParticleEndOpacity7}"
                                                 BeginTime="{StaticResource ParticleBeginTime7}"
                                                 Duration="{StaticResource ParticleDuration7}"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger.Actions>
                </EventTrigger>
            </Grid.Triggers>
            
            <Border x:Name="p0" Background="{StaticResource ParticleBackgroundColor}" Opacity="{StaticResource ParticleOpacity}">
                <Border.RenderTransform>
                    <RotateTransform/>
                </Border.RenderTransform>
                <Border.RenderTransformOrigin>
                    <Point X="{StaticResource RotationPointX}" Y="{StaticResource RotationPointY}"/>
                </Border.RenderTransformOrigin>
                <Ellipse Style="{StaticResource EllipseStyle}">
                    <Ellipse.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform X="{StaticResource StartingPointX}" Y="{StaticResource StartingPointY}"/>
                            <RotateTransform Angle="{StaticResource ParticleOriginAngleP0}"/>
                        </TransformGroup>
                    </Ellipse.RenderTransform>
                </Ellipse>
            </Border>
            <Border x:Name="p1" Background="{StaticResource ParticleBackgroundColor}" Opacity="{StaticResource ParticleOpacity}">
                <Border.RenderTransform>
                    <RotateTransform/>
                </Border.RenderTransform>
                <Border.RenderTransformOrigin>
                    <Point X="{StaticResource RotationPointX}" Y ="{StaticResource RotationPointY}"/>
                </Border.RenderTransformOrigin>
                <Ellipse Style = "{StaticResource EllipseStyle}">
                    <Ellipse.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform X="{StaticResource StartingPointX}" Y="{StaticResource StartingPointY}"/>
                            <RotateTransform Angle="{StaticResource ParticleOriginAngleP1}"/>
                        </TransformGroup>
                    </Ellipse.RenderTransform>
                </Ellipse>
            </Border>
            <Border x:Name="p2" Background="{StaticResource ParticleBackgroundColor}" Opacity="{StaticResource ParticleOpacity}">
                <Border.RenderTransform>
                    <RotateTransform/>
                </Border.RenderTransform>
                <Border.RenderTransformOrigin>
                    <Point X="{StaticResource RotationPointX}" Y="{StaticResource RotationPointY}"/>
                </Border.RenderTransformOrigin>
                <Ellipse Style="{StaticResource EllipseStyle}">
                    <Ellipse.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform X="{StaticResource StartingPointX}" Y="{StaticResource StartingPointY}"/>
                            <RotateTransform Angle="{StaticResource ParticleOriginAngleP2}"/>
                        </TransformGroup>
                    </Ellipse.RenderTransform>
                </Ellipse>
            </Border>
            <Border x:Name="p3" Background="{StaticResource ParticleBackgroundColor}" Opacity="{StaticResource ParticleOpacity}">
                <Border.RenderTransform>
                    <RotateTransform/>
                </Border.RenderTransform>
                <Border.RenderTransformOrigin>
                    <Point X="{StaticResource RotationPointX}" Y="{StaticResource RotationPointY}"/>
                </Border.RenderTransformOrigin>
                <Ellipse Style="{StaticResource EllipseStyle}">
                    <Ellipse.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform X="{StaticResource StartingPointX}" Y="{StaticResource StartingPointY}"/>
                            <RotateTransform Angle="{StaticResource ParticleOriginAngleP3}"/>
                        </TransformGroup>
                    </Ellipse.RenderTransform>
                </Ellipse>
            </Border>
            <Border x:Name="p4" Background="{StaticResource ParticleBackgroundColor}" Opacity="{StaticResource ParticleOpacity}">
                <Border.RenderTransform>
                    <RotateTransform/>
                </Border.RenderTransform>
                <Border.RenderTransformOrigin>
                    <Point X="{StaticResource RotationPointX}" Y="{StaticResource RotationPointY}"/>
                </Border.RenderTransformOrigin>
                <Ellipse Style="{StaticResource EllipseStyle}">
                    <Ellipse.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform X="{StaticResource StartingPointX}" Y="{StaticResource StartingPointY}"/>
                            <RotateTransform Angle="{StaticResource ParticleOriginAngleP4}"/>
                        </TransformGroup>
                    </Ellipse.RenderTransform>
                </Ellipse>
            </Border>
        </Grid>
    </Grid>
</UserControl>