HOW TO：在立體場景中建立鏡頭位置和方向的動畫
下列範例顯示如何在立體場景中建立鏡頭位置和其所指方向的動畫。 這是透過分別對 PerspectiveCamera 的 Position 和 LookDirection 屬性使用 Point3DAnimation 和 Vector3DAnimation 建立動畫來達成。 您可以使用像這樣的動畫，變更觀看者的視景以回應某個事件。
範例
<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml" >
<DockPanel>
<Viewbox>
<Canvas Width="321" Height="201">
<Viewport3D Name="MyAnimatedObject"
ClipToBounds="True" Width="150" Height="150"
Canvas.Left="0" Canvas.Top="10">
<!-- Defines the camera used to view the 3D object. The position and direction of this
camera is animated in the Storyboard below. -->
<Viewport3D.Camera>
<PerspectiveCamera x:Name="myPerspectiveCamera" Position="0,0,2" LookDirection="0,0,-1"
FieldOfView="45" />
</Viewport3D.Camera>
<Viewport3D.Children>
<ModelVisual3D>
<ModelVisual3D.Children>
<!-- This resource defines the 3D cube that is used in this example.-->
<StaticResource ResourceKey="PictureCubeModelVisual3DResource" />
</ModelVisual3D.Children>
</ModelVisual3D>
</Viewport3D.Children>
<Viewport3D.Triggers>
<EventTrigger RoutedEvent="Viewport3D.Loaded">
<BeginStoryboard>
<Storyboard>
<!-- This animation moves the camera around the object. The object is not
changing position or rotating but moving the camera makes it appear that
it is.-->
<Point3DAnimation
Storyboard.TargetName="myPerspectiveCamera"
Storyboard.TargetProperty="Position"
From="0,0,2" To="1,2,3" Duration="0:0:4" RepeatBehavior="Forever"/>
<!-- As the position of the camera changes using the Point3DAnimation
above, the direction the camera is pointing swivels to keep the object
within the view of the camera. -->
<Vector3DAnimation
Storyboard.TargetName="myPerspectiveCamera"
Storyboard.TargetProperty="LookDirection"
From="0,0,-1" To="-1,-2,-3" Duration="0:0:4" RepeatBehavior="Forever"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Viewport3D.Triggers>
</Viewport3D>
</Canvas>
</Viewbox>
</DockPanel>
</Page>