Easing equation function for an exponential (2^t) easing inout: acceleration until halfway, then deceleration. - CSharp System

CSharp examples for System:Math Easing Function

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Description

Easing equation function for an exponential (2^t) easing inout: acceleration until halfway, then deceleration.

Demo Code


using System;//from   ww w  . j a  v a  2 s  .  com

public class Main{
        /// <summary>
   /// Easing equation function for an exponential (2^t) easing in/out: 
   /// acceleration until halfway, then deceleration.
   /// </summary>
   /// <param name="t">Current time in seconds.</param>
   /// <param name="b">Starting value.</param>
   /// <param name="c">Change in value.</param>
   /// <param name="d">Duration of animation.</param>
   /// <returns>The correct value.</returns>
   public static double ExpoEaseInOut( double t, double b, double c, double d )
   {
      if ( t == 0 )
         return b;
      
      if ( t == d )
         return b + c;
      
      if ( ( t /= d / 2 ) < 1 )
         return c / 2 * Math.Pow( 2, 10 * ( t - 1 ) ) + b;
      
      return c / 2 * ( -Math.Pow( 2, -10 * --t ) + 2 ) + b;
   }
}

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