osu! easing functions

gistfile1.cs

//used for easing = 1
internal static float easeInVal(float currTime, float start, float end, float duration)
{
    return duration == 0 ? start : MathHelper.Lerp(end, start, (float) Math.Pow(1 - currTime/duration, 2));
}

//used for easing = 2
internal static float easeOutVal(float currTime, float start, float end, float duration)
{
    return duration == 0 ? start : MathHelper.Lerp(start, end, (float) Math.Pow(currTime/duration, 2));
}

//used for easing = 0
internal static float easeNoneVal(float currTime, float start, float end, int duration)
{
    return duration == 0 ? start : MathHelper.Lerp(start, end, currTime/duration);
}

// (yes i'm aware the function names are back-to-front >_>)