liste et fonctions
##################

easeInSine
**********

.. code-block:: javascript

   function easeInSine(x) {
      return 1 - cos( ( x * Math.PI ) / 2 );
   }

easeOutSine
***********

.. code-block:: javascript

   function easeOutSine(x) {
       return sin((x * Math.PI) / 2);
   }


easeInOutSine
*************

.. code-block:: javascript

function easeInOutSine(x) {
   return -(cos(Math.PI * x) - 1) / 2;
}


easeInQuad
**********

.. code-block:: javascript

   function easeInQuad(x) {
       return x * x;
   }

easeOutQuad
***********

.. code-block:: javascript

   function easeOutQuad(x: number): number {
      return 1 - (1 - x) * (1 - x);
   }

easeInOutQuad
*************

.. code-block:: javascript

   function easeInOutQuad(x) {
       return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
   }


easeInCubic
***********

.. code-block:: javascript

   function easeInCubic(x) {
       return x * x * x;
   }


easeOutCubic
************

.. code-block:: javascript

   function easeOutCubic(x) {
       return 1 - Math.pow(1 - x, 3);
   }


easeInOutCubic
**************

.. code-block:: javascript

   function easeInOutCubic(x) {
       return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
   }


easeInQuart
***********

.. code-block:: javascript

   function easeInQuart(x) {
       return x * x * x * x;
   }

easeOutQuart
************

.. code-block:: javascript

   function easeOutQuart(x) {
       return 1 - Math.pow(1 - x, 4);
   }

easeInOutQuart
**************

.. code-block:: javascript

   function easeInOutQuart(x) {
      return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
   }

easeInQuint
***********

.. code-block:: javascript

   function easeInQuint(x) {
       return x * x * x * x * x;
   }

easeOutQuint
************

.. code-block:: javascript

   function easeOutQuint(x) {
       return 1 - Math.pow(1 - x, 5);
   }

easeInOutQuint
**************

.. code-block:: javascript

   function easeInOutQuint(x) {
      return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
   }

easeInExpo
**********

.. code-block:: javascript

   function easeInExpo(x) {
       return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
   }

easeOutExpo
***********

.. code-block:: javascript

   function easeOutExpo(x: number): number {
      return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
   }

easeInOutExpo
*************

.. code-block:: javascript

   function easeInOutExpo(x) {
      return x === 0
           ? 0
           : x === 1
               ? 1
               : x < 0.5 ? Math.pow(2, 20 * x - 10) / 2
                   : (2 - Math.pow(2, -20 * x + 10)) / 2;
   }



easeInCirc
**********

.. code-block:: javascript

   function easeInCirc(x) {
      return 1 - Math.sqrt(1 - Math.pow(x, 2));
   }


easeOutCirc
***********

.. code-block:: javascript

   function easeOutCirc(x: number): number {
      return Math.sqrt(1 - Math.pow(x - 1, 2));
   }

easeInOutCirc
*************

.. code-block:: javascript

   function easeInOutCirc(x) {
       return x < 0.5
           ? (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2
           : (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
   }


easeInBack
**********

.. code-block:: javascript

   function easeInBack(x) {
      const c1 = 1.70158;
      const c3 = c1 + 1;
      return c3 * x * x * x - c1 * x * x;
   }

easeOutBack
***********

.. code-block:: javascript

   function easeOutBack(x) {
      const c1 = 1.70158;
      const c3 = c1 + 1;
      return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
   }

easeInOutBack
*************

.. code-block:: javascript

   function easeInOutBack(x) {
       const c1 = 1.70158;
       const c2 = c1 * 1.525;
       return x < 0.5
           ? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2
           : (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
   }


easeInElastic
*************

.. code-block:: javascript

   function easeInElastic(x) {
       const c4 = (2 * Math.PI) / 3;
       return x === 0
           ? 0
           : x === 1
               ? 1
               : -Math.pow(2, 10 * x - 10) * Math.sin((x * 10 - 10.75) * c4);
   }

easeOutElastic
**************

.. code-block:: javascript

   function easeOutElastic(x) {
       const c4 = (2 * Math.PI) / 3;
       return x === 0
           ? 0
           : x === 1
               ? 1
               : Math.pow(2, -10 * x) * Math.sin((x * 10 - 0.75) * c4) + 1;
   }

easeInOutElastic
****************

.. code-block:: javascript

   function easeInOutElastic(x) {
   const c5 = (2 * Math.PI) / 4.5;
   return x === 0
        ? 0
        : x === 1
            ? 1
            : x < 0.5
                ? -(Math.pow(2, 20 * x - 10) * Math.sin((20 * x - 11.125) * c5)) / 2
                : (Math.pow(2, -20 * x + 10) * Math.sin((20 * x - 11.125) * c5)) / 2 + 1;
   }

easeInBounce
************

.. code-block:: javascript

   function easeInBounce(x) {
      return 1 - easeOutBounce(1 - x);
   }

.. warning::

   Nécessite **easeOutBounce**.

easeOutBounce
*************

.. code-block:: javascript

   function easeOutBounce(x) {
      const n1 = 7.5625;
      const d1 = 2.75;
      if (x < 1 / d1) {
           return n1 * x * x;
      }
      else if (x < 2 / d1) {
           return n1 * (x -= 1.5 / d1) * x + 0.75;
      }
      else if (x < 2.5 / d1) {
           return n1 * (x -= 2.25 / d1) * x + 0.9375;
      }
      else {
           return n1 * (x -= 2.625 / d1) * x + 0.984375;
      }
   }

easeInOutBounce
***************

.. code-block:: javascript

   function easeInOutBounce(x) {
      return x < 0.5
        ? (1 - easeOutBounce(1 - 2 * x)) / 2
        : (1 + easeOutBounce(2 * x - 1)) / 2;
   }

.. warning::

   Nécessite **easeOutBounce**.