/**

* @author Richard Davey <rich@photonstorm.com>

* @copyright 2018 Photon Storm Ltd.

* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}

*/

/**

* Work out what percentage `value` is of the range between `min` and `max`.

* If `max` isn't given then it will return the percentage of `value` to `min`.

*

* You can optionally specify an `upperMax` value, which is a mid-way point in the range that represents 100%, after which the % starts to go down to zero again.

*

* @function Phaser.Math.Percent

* @since 3.0.0

*

* @param {number} value - The value to determine the percentage of.

* @param {number} min - The minimum value.

* @param {number} [max] - The maximum value.

* @param {number} [upperMax] - The mid-way point in the range that represents 100%.

*

* @return {number} A value between 0 and 1 representing the percentage.

*/

var Percent = function (value, min, max, upperMax)

{

if (max === undefined) { max = min + 1; }

var percentage = (value - min) / (max - min);

if (percentage > 1)

{

if (upperMax !== undefined)

{

percentage = ((upperMax - value)) / (upperMax - max);

if (percentage < 0)

{

percentage = 0;

}

}

else

{

percentage = 1;

}

}

else if (percentage < 0)

{

percentage = 0;

}

return percentage;

};

module.exports = Percent;