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POWPF: Animation is not smooth
 

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    <p>I am animating a <code>TextBlock</code>. In 60 seconds, it increases <code>FontSize</code> from 8pt to 200pt. Everything is working fine, except that my animation is moving up and down a bit as the text grows. Why is this happening and is it possible to avoid this?</p> <p>I have a very simple XAML file:</p> <pre><code>&lt;Window x:Class="Timer.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="800" Height="500" Title="MainWindow" Loaded="Window_Loaded"&gt; &lt;Grid&gt; &lt;TextBlock Name="TimerTextBlock" HorizontalAlignment="Center" VerticalAlignment="Center" Text="00h : 00m : 00.000s" /&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>And equally simple code-behind:</p> <pre><code>public partial class MainWindow : Window { private const string timerFormat = "{0:hh'h : 'mm'm : 'ss'.'fff's'}"; private DispatcherTimer dispatcherTimer; private DateTime targetTime; public MainWindow() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { targetTime = DateTime.Now.AddSeconds(60); double totalTime = targetTime.Subtract(DateTime.Now).TotalMilliseconds; DoubleAnimation animation = new DoubleAnimation(); animation.From = TimerTextBlock.FontSize; animation.To = 200; animation.Duration = new Duration(targetTime.Subtract(DateTime.Now)); TimerTextBlock.BeginAnimation(TextBlock.FontSizeProperty, animation); dispatcherTimer = new DispatcherTimer(); dispatcherTimer.Interval = TimeSpan.FromMilliseconds(1); dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick); dispatcherTimer.Start(); } private void dispatcherTimer_Tick(object sender, EventArgs e) { if (DateTime.Compare(targetTime, DateTime.Now) &gt; 0) { TimerTextBlock.Text = string.Format(timerFormat, targetTime.Subtract(DateTime.Now)); } } } </code></pre> <p>Thank you for all the clarifications. </p>
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    1. COI concluded that it's definitely the problem with 'pixel splitting'. It makes sense to chop a bit, as the control gets in a situation where it has to be drawn somewhere in between two pixels. But, is there a way to avoid this somehow?
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    2. COI've been searching for answers on the internet and I came across some "MatrixAnimations". What is that, could it do the trick? (And if yes, how?)
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