KeySpline.GetSplineProgress(Double) Method

Definition

Namespace:

System.Windows.Media.Animation

Assembly:

PresentationCore.dll

Calculates spline progress from a supplied linear progress.

public:
 double GetSplineProgress(double linearProgress);

public double GetSplineProgress (double linearProgress);

member this.GetSplineProgress : double -> double

Public Function GetSplineProgress (linearProgress As Double) As Double

Parameters

linearProgress

Double

The linear progress to evaluate.

Returns

Double

The calculated spline progress.

Remarks

To understand how a KeySpline works, it is helpful to understand cubic Bezier curves. A cubic Bezier curve is defined by a start point, an end point, and two control points. The two coordinates in the KeySpline defines those two control points. When describing key splines, the start point of the Bezier curve is always 0, and the end point is always 1, which is why you define only the two control points. 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 attribute over the time segment. To better see the relationship between animation progress and a Bezier curve, see Key Spline Animation Sample.