Tween / Animation Engine Interface Proposal

animation-engine.cs

public interface IAnimator
{
    IArray<IAnimation> Animations { get; }
    IAnimator Start(IAnimation anim);
    IAnimator End(IAnimation anim);
    IAnimator IsRunning();

    T Drive<T>(IAnimation animation, Func<T, T, float, T> lerp);
}

public interface IAnimation
{
    double Evaluate(double t); 
    Interval Period { get; }
}

public static class AnimationExtensions
{
    public static IAnimation CutAfter(this IAnimation animation, double time) => default;
    public static IAnimation CutBefore(this IAnimation animation, double time) => default;
    public static IAnimation Splice(this IAnimation animation, double time, IAnimation other) => default;
    public static IAnimation Invert(this IAnimation animation) => default;
    public static IAnimation Mirror(this IAnimation animation) => default;
    public static IAnimation Repeat(this IAnimation animation, double count) => default;
    public static IAnimation YoyoLoop(this IAnimation animation, double count) => default;
    public static IAnimation SetStartTime(this IAnimation animation, double d) => default;
    public static IAnimation SetEase(this IAnimation animation, Func<double, double> func) => default;
    public static IAnimation Sequence(this IAnimation animation, IAnimation other) => default;
    public static IAnimation SetDuration(this IAnimation animation, double scale) => default;
    public static IAnimation Race(this IAnimation animation, IAnimation other) => default; 
    public static IAnimation Blend(this IAnimation animation, IAnimation other, IAnimation blendCurve) => default;
}