XAML-Map-Control/MapControl/WPF/LocationAnimation.WPF.cs

using System;
using System.Windows;
using System.Windows.Media.Animation;

namespace MapControl;

public class LocationAnimation : AnimationTimeline
{
    public override Type TargetPropertyType => typeof(Location);

    public Location To { get; set; }

    public IEasingFunction EasingFunction { get; set; }

    protected override Freezable CreateInstanceCore()
    {
        return new LocationAnimation
        {
            To = To,
            EasingFunction = EasingFunction
        };
    }

    public override object GetCurrentValue(object defaultOriginValue, object defaultDestinationValue, AnimationClock animationClock)
    {
        var from = (Location)defaultOriginValue;
        var progress = animationClock.CurrentProgress ?? 1d;

        if (EasingFunction != null)
        {
            progress = EasingFunction.Ease(progress);
        }

        return new Location(
            (1d - progress) * from.Latitude + progress * To.Latitude,
            (1d - progress) * from.Longitude + progress * To.Longitude);
    }
}