IXRKeySpline (Windows Embedded CE 6.0)
1/6/2010
This class is used by a spline key frame to define animation progress.
Syntax
class IXRKeySpline : public IXRDependencyObject
Methods
| Method | Description |
|---|---|
Retrieves the first control point used to define a Bézier curve that describes this key spline. |
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Retrieves the second control point used to define a Bézier curve that describes this key spline. |
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Sets the first control point used to define a Bézier curve that describes this key spline. |
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Sets the second control point used to define a Bézier curve that describes this key spline. |
Remarks
You can use IXRKeySpline to calculate a curved line that represents the rate of interpolation over the duration of the animation. The starting point, endpoint, two control points on the line each affect the shape of the adjacent curve.
Key splines drawn on a coordinate system always have the starting point at (0,0) and the endpoint at (1,1). This is why you define only the two control points in IXRKeySpline::SetControlPoint1 and IXRKeySpline::SetControlPoint2. The resulting curve specifies how an animation is interpolated during a time segment. That is, the curve represents the rate of change in the animation's target value.
A key spline that is a straight line from the starting point (0,0) to the endpoint (1,1) describes an animation with a constant rate of change. When each key frame in an animation has a different key spline, the rate of change during the animation is constantly shifting.
You can specify an IXRKeySpline object in IXRSplineDoubleKeyFrame::SetKeySpline, IXRSplineColorKeyFrame::SetKeySpline, and IXRSplinePointKeyFrame::SetKeySpline.
You can also define a key spline in Microsoft Silverlight 2 XAML. For information about the differences between XAML in Silverlight for Windows Embedded and Silverlight 2, see Differences Between Silverlight for the Web and Silverlight for Windows Embedded. For more information about how to define this element in the source XAML for your application, see this Microsoft Web site.
Inheritance Hierarchy
IXRKeySpline
.NET Framework Equivalent
System.Windows.Media.Animation.KeySpline
Requirements
| Header | XamlRuntime.h |
| sysgen | SYSGEN_XAML_RUNTIME |
| Windows Embedded CE | Windows Embedded CE 6.0 R3 |
See Also
Reference
Classes for Visual Appearance and Behavior