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copied!<p>My experience comes from 2D animation, but I guess the problem is the same.</p> <p>For some stupid reason (probably relating to an unhealthy focus on XAML), Storyboards can only animate Freezable objects by looking them up by name. (See example in <a href="http://msdn.microsoft.com/en-us/library/ms742868.aspx" rel="nofollow">Storyboards Overview</a>.) Thus although you provide a reference to your 'rotation' object when you call Storyboard.SetTarget(animation, rotation), the Storyboard only wants to remember and use a name, which it does not have.</p> <p>The solution is:</p> <ul> <li>Create a naming scope around the element that will govern the transform.</li> <li>Call RegisterName() for each Freezable object being animated.</li> <li>Pass the element to Storyboard.Begin()</li> </ul> <p>Which would make your code look something like this (not tested):</p> <pre><code>FrameworkContentElement element = new FrameworkContentElement(); NameScope.SetNameScope(element, new NameScope()); RotateTransform3D tempTransform = (RotateTransform3D)wheel.Transform; AxisAngleRotation3D rotation = (AxisAngleRotation3D)tempTransform.Rotation; element.RegisterName("rotation", rotation); Storyboard storyboard = new Storyboard(); DoubleAnimation animation = new DoubleAnimation(); animation.By = defaultAngle; animation.Duration = TimeSpan.FromSeconds(.5); Storyboard.SetTarget(animation, rotation); Storyboard.SetTargetProperty(animation, new PropertyPath("Angle")); storyboard.Children.Add(animation); storyboard.Duration = animation.Duration; storyboard.Begin(element, HandoffBehavior.Compose); </code></pre> <p>None of this is necessary in XAML because your objects are automatically registered.</p> <p>EDIT: But then I worked out that you can simplify things by leaving out the Storyboard altogether:</p> <pre><code>var T = new TranslateTransform(40, 0); Duration duration = new Duration(new TimeSpan(0, 0, 0, 1, 0); DoubleAnimation anim = new DoubleAnimation(30, duration); T.BeginAnimation(TranslateTransform.YProperty, anim); </code></pre>

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