Evaluate Method (PennerEquation)

This method will invoke a delegate which in turn points to a method with the actual implementation of the equation. If we need to create a custom animation one of the methods that needs to be implemented/overrided is GetCurrentValueCore. When a PennerEquation is set as the "Equation" property of a custom animation like IterativeDoubleAnimation, this method is called from the GetCurrentValueCore method of the custom animation.

Syntax

Visual Basic
C#

'Declaration
 
Public Overrides Function Evaluate( _
   ByVal currentTime As TimeSpan, _
   ByVal from As Double, _
   ByVal to As Double, _
   ByVal duration As TimeSpan _
) As Double

'Usage
 
Dim instance As PennerEquation
Dim currentTime As TimeSpan
Dim from As Double
Dim to As Double
Dim duration As TimeSpan
Dim value As Double
 
value = instance.Evaluate(currentTime, from, to, duration)

public override double Evaluate( 
   TimeSpan currentTime,
   double from,
   double to,
   TimeSpan duration
)

Parameters

currentTime: current time of the animation clock within its current iteration
from: begining value for the animation
to: ending value for the animation
duration: The Duration property specifies the simple duration for a Timeline. The simple duration is the length of time that it takes to complete a single forward iteration of the time segment.

Requirements

Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PennerEquation Class
PennerEquation Members
Base Implementation in Evaluate