// utility function for starting the tween
private static IEnumerator Start(T tweenInfo)
{
if (!tweenInfo.ValidTarget())
{
yield break;
}
float elapsedTime = 0.0f;
while (elapsedTime < tweenInfo.duration)
{
elapsedTime += (tweenInfo.ignoreTimeScale ? Time.unscaledDeltaTime : Time.deltaTime);
float percentage = TweenEasingHandler.Apply(tweenInfo.easing, elapsedTime, 0.0f, 1.0f, tweenInfo.duration);
tweenInfo.TweenValue(percentage);
yield return(null);
}
tweenInfo.TweenValue(1.0f);
tweenInfo.Finished();
}
/// <summary>
/// Apply the specified easingType, t, b, c and d.
/// </summary>
/// <param name="e">Easing type.</param>
/// <param name="t">Elapsed time.</param>
/// <param name="b">Starting value.</param>
/// <param name="c">Target value.</param>
/// <param name="d">Duration.</param>
public static float Apply(TweenEasing e, float t, float b, float c, float d)
{
switch (e)
{
case TweenEasing.Swing:
{
return(-c * (t /= d) * (t - 2f) + b);
}
case TweenEasing.InQuad:
{
return(c * (t /= d) * t + b);
}
case TweenEasing.OutQuad:
{
return(-c * (t /= d) * (t - 2) + b);
}
case TweenEasing.InOutQuad:
{
if ((t /= d / 2) < 1)
{
return(c / 2 * t * t + b);
}
return(-c / 2 * ((--t) * (t - 2) - 1) + b);
}
case TweenEasing.InCubic:
{
return(c * (t /= d) * t * t + b);
}
case TweenEasing.OutCubic:
{
return(c * ((t = t / d - 1) * t * t + 1) + b);
}
case TweenEasing.InOutCubic:
{
if ((t /= d / 2) < 1)
{
return(c / 2 * t * t * t + b);
}
return(c / 2 * ((t -= 2) * t * t + 2) + b);
}
case TweenEasing.InQuart:
{
return(c * (t /= d) * t * t * t + b);
}
case TweenEasing.OutQuart:
{
return(-c * ((t = t / d - 1) * t * t * t - 1) + b);
}
case TweenEasing.InOutQuart:
{
if ((t /= d / 2) < 1)
{
return(c / 2 * t * t * t * t + b);
}
return(-c / 2 * ((t -= 2) * t * t * t - 2) + b);
}
case TweenEasing.InQuint:
{
return(c * (t /= d) * t * t * t * t + b);
}
case TweenEasing.OutQuint:
{
return(c * ((t = t / d - 1) * t * t * t * t + 1) + b);
}
case TweenEasing.InOutQuint:
{
if ((t /= d / 2) < 1)
{
return(c / 2 * t * t * t * t * t + b);
}
return(c / 2 * ((t -= 2) * t * t * t * t + 2) + b);
}
case TweenEasing.InSine:
{
return(-c *Mathf.Cos(t / d *(Mathf.PI / 2)) + c + b);
}
case TweenEasing.OutSine:
{
return(c * Mathf.Sin(t / d * (Mathf.PI / 2)) + b);
}
case TweenEasing.InOutSine:
{
return(-c / 2 * (Mathf.Cos(Mathf.PI * t / d) - 1) + b);
}
case TweenEasing.InExpo:
{
return((t == 0) ? b : c *Mathf.Pow(2, 10 *(t / d - 1)) + b);
}
case TweenEasing.OutExpo:
{
return((t == d) ? b + c : c *(-Mathf.Pow(2, -10 * t / d) + 1) + b);
}
case TweenEasing.InOutExpo:
{
if (t == 0)
{
return(b);
}
if (t == d)
{
return(b + c);
}
if ((t /= d / 2) < 1)
{
return(c / 2 * Mathf.Pow(2, 10 * (t - 1)) + b);
}
return(c / 2 * (-Mathf.Pow(2, -10 * --t) + 2) + b);
}
case TweenEasing.InCirc:
{
return(-c * (Mathf.Sqrt(1 - (t /= d) * t) - 1) + b);
}
case TweenEasing.OutCirc:
{
return(c * Mathf.Sqrt(1 - (t = t / d - 1) * t) + b);
}
case TweenEasing.InOutCirc:
{
if ((t /= d / 2) < 1)
{
return(-c / 2 * (Mathf.Sqrt(1 - t * t) - 1) + b);
}
return(c / 2 * (Mathf.Sqrt(1 - (t -= 2) * t) + 1) + b);
}
case TweenEasing.InBack:
{
float s = 1.70158f;
return(c * (t /= d) * t * ((s + 1f) * t - s) + b);
}
case TweenEasing.OutBack:
{
float s = 1.70158f;
return(c * ((t = t / d - 1f) * t * ((s + 1f) * t + s) + 1f) + b);
}
case TweenEasing.InOutBack:
{
float s = 1.70158f;
if ((t /= d / 2f) < 1f)
{
return(c / 2f * (t * t * (((s *= (1.525f)) + 1f) * t - s)) + b);
}
return(c / 2f * ((t -= 2f) * t * (((s *= (1.525f)) + 1f) * t + s) + 2f) + b);
}
case TweenEasing.InBounce:
{
return(c - TweenEasingHandler.Apply(TweenEasing.OutBounce, d - t, 0f, c, d) + b);
}
case TweenEasing.OutBounce:
{
if ((t /= d) < (1f / 2.75f))
{
return(c * (7.5625f * t * t) + b);
}
else if (t < (2f / 2.75f))
{
return(c * (7.5625f * (t -= (1.5f / 2.75f)) * t + .75f) + b);
}
else if (t < (2.5f / 2.75f))
{
return(c * (7.5625f * (t -= (2.25f / 2.75f)) * t + .9375f) + b);
}
else
{
return(c * (7.5625f * (t -= (2.625f / 2.75f)) * t + .984375f) + b);
}
}
case TweenEasing.InOutBounce:
{
if (t < d / 2f)
{
return(TweenEasingHandler.Apply(TweenEasing.InBounce, t * 2f, 0f, c, d) * .5f + b);
}
return(TweenEasingHandler.Apply(TweenEasing.OutBounce, t * 2f - d, 0f, c, d) * .5f + c * .5f + b);
}
case TweenEasing.InElastic:
{
float s = 1.70158f; float p = 0f; float a = c;
if (t == 0f)
{
return(b);
}
if ((t /= d) == 1f)
{
return(b + c);
}
if (p == 0f)
{
p = d * .3f;
}
if (a < Mathf.Abs(c))
{
a = c; s = p / 4f;
}
else
{
s = p / (2f * Mathf.PI) * Mathf.Asin(c / a);
}
if (float.IsNaN(s))
{
s = 0f;
}
return(-(a * Mathf.Pow(2f, 10f * (t -= 1f)) * Mathf.Sin((t * d - s) * (2f * Mathf.PI) / p)) + b);
}
case TweenEasing.OutElastic:
{
float s = 1.70158f; float p = 0f; float a = c;
if (t == 0f)
{
return(b);
}
if ((t /= d) == 1f)
{
return(b + c);
}
if (p == 0f)
{
p = d * .3f;
}
if (a < Mathf.Abs(c))
{
a = c; s = p / 4f;
}
else
{
s = p / (2f * Mathf.PI) * Mathf.Asin(c / a);
}
if (float.IsNaN(s))
{
s = 0f;
}
return(a * Mathf.Pow(2f, -10f * t) * Mathf.Sin((t * d - s) * (2f * Mathf.PI) / p) + c + b);
}
case TweenEasing.InOutElastic:
{
float s = 1.70158f; float p = 0f; float a = c;
if (t == 0f)
{
return(b);
}
if ((t /= d / 2f) == 2f)
{
return(b + c);
}
if (p == 0f)
{
p = d * (.3f * 1.5f);
}
if (a < Mathf.Abs(c))
{
a = c; s = p / 4f;
}
else
{
s = p / (2f * Mathf.PI) * Mathf.Asin(c / a);
}
if (float.IsNaN(s))
{
s = 0f;
}
if (t < 1f)
{
return(-.5f * (a * Mathf.Pow(2f, 10f * (t -= 1f)) * Mathf.Sin((t * d - s) * (2f * Mathf.PI) / p)) + b);
}
return(a * Mathf.Pow(2f, -10f * (t -= 1f)) * Mathf.Sin((t * d - s) * (2f * Mathf.PI) / p) * .5f + c + b);
}
case TweenEasing.Linear:
default:
{
return(c * t / d + b);
}
}
}