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fixed between() docs and updated it to accept negative numbers, default values, and auto-orders min/max parameters if they're input wrong. Added a random() function that does the same but returns floats instead of integers

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James Lowrey 2016-09-14 18:25:58 -07:00
parent b1473c55b9
commit a6302cdd9a
1 changed files with 37 additions and 5 deletions
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42
src/math/Math.js
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@ -24,17 +24,49 @@ Phaser.Math = {
PI2: Math.PI * 2,
/**
* Returns a number between the `min` and `max` values.
* Returns a random float in the range `[min, max)`. If these parameters are not in order than they will be put in order.
* Default is 0 for `min` and 1 for `max`.
*
* @method Phaser.Math#between
* @param {number} min - The minimum value. Must be positive, and less than 'max'.
* @param {number} max - The maximum value. Must be position, and greater than 'min'.
* @return {number} A value between the range min to max.
* @param {number} min - The minimum value. Must be a Number.
* @param {number} max - The maximum value. Must be a Number.
* @return {number} A floating point number between the range min to max.
*/
random: function (min, max) {
if (min === undefined) { min = 0; }
if (max === undefined) { max = 1; }
if ( min < max ) {
var temp = min;
min = max;
max = temp;
}
return Math.random() * (max - min) + min;
},
/**
* Returns a random integer in the range `[min, max]`. If these parameters are not in order than they will be put in order.
* Default is 0 for `min` and 1 for `max`.
*
* @method Phaser.Math#between
* @param {number} min - The minimum value. Must be a Number.
* @param {number} max - The maximum value. Must be a Number.
* @return {number} A floating point number between the range min to max.
*/
between: function (min, max) {
if (min === undefined) { min = 0; }
if (max === undefined) { max = 1; }
return Math.floor(Math.random() * (max - min + 1) + min);
if ( min < max ) {
var temp = min;
min = max;
max = temp;
}
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min + 1)) + min;
},
/**