CtrEditor/ObjetosSim/UserControls/ucTransporteTTop.xaml

<UserControl x:Class="CtrEditor.ObjetosSim.ucTransporteTTop"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d"
             xmlns:vm="clr-namespace:CtrEditor.ObjetosSim"
             xmlns:convert="clr-namespace:CtrEditor.Convertidores"
             xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity">

    <UserControl.Resources>
        <convert:MeterToPixelConverter x:Key="MeterToPixelConverter"/>
        <convert:SpeedAndWidthToDurationConverter x:Key="SpeedAndWidthToDurationConverter"/>

        <!-- Define the VisualBrush for the conveyor belt pattern -->
        <VisualBrush x:Key="BeltBrush" TileMode="Tile" Viewport="0,0,0.1,1" ViewportUnits="RelativeToBoundingBox" Viewbox="0,0,20,10" ViewboxUnits="Absolute">
            <VisualBrush.Transform>
                <TranslateTransform x:Name="BrushTransform"/>
            </VisualBrush.Transform>
            <VisualBrush.Visual>
                <Canvas>
                    <Rectangle Fill="Gray" Width="10" Height="10"/>
                    <Rectangle Fill="DarkGray" Width="10" Height="10" Canvas.Left="10"/>
                </Canvas>
            </VisualBrush.Visual>
        </VisualBrush>
    </UserControl.Resources>

    <UserControl.DataContext>
        <vm:osTransporteTTop Ancho="2"/>
    </UserControl.DataContext>

    <Canvas>
        <Rectangle x:Name="Transporte"
                   Width="{Binding Ancho, Converter={StaticResource MeterToPixelConverter}}"
                   Height="{Binding Alto, Converter={StaticResource MeterToPixelConverter}}"
                   Fill="{StaticResource BeltBrush}">
            <Rectangle.RenderTransform>
                <RotateTransform Angle="{Binding Angulo}"/>
            </Rectangle.RenderTransform>
            
            <Rectangle.Triggers>
                <EventTrigger RoutedEvent="Loaded">
                    <BeginStoryboard>
                        
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetProperty="(Rectangle.Fill).(VisualBrush.Transform).(TranslateTransform.X)"
                                             From="0" To="{Binding Ancho, Converter={StaticResource MeterToPixelConverter}}">
                                <DoubleAnimation.Duration>
                                    <MultiBinding Converter="{StaticResource SpeedAndWidthToDurationConverter}">
                                        <Binding Path="VelocidadActual"/>
                                        <Binding Path="Ancho"/>
                                    </MultiBinding>
                                </DoubleAnimation.Duration>
                                <DoubleAnimation.RepeatBehavior>Forever</DoubleAnimation.RepeatBehavior>
                            </DoubleAnimation>
                        </Storyboard>
                        
                    </BeginStoryboard>
                </EventTrigger>
            </Rectangle.Triggers>
            
        </Rectangle>
    </Canvas>
</UserControl>