phaser/src/actions/SmoothStep.js
2018-02-12 16:01:21 +00:00

48 lines
1.2 KiB
JavaScript

/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
var MathSmoothStep = require('../math/SmoothStep');
/**
* [description]
*
* @function Phaser.Actions.SmoothStep
* @since 3.0.0
*
* @param {array} items - An array of Game Objects. The contents of this array are updated by this Action.
* @param {string} property - [description]
* @param {number} min - [description]
* @param {number} max - [description]
* @param {number} inc - [description]
*
* @return {array} The array of Game Objects that was passed to this Action.
*/
var SmoothStep = function (items, property, min, max, inc)
{
if (inc === undefined) { inc = false; }
var step = Math.abs(max - min) / items.length;
var i;
if (inc)
{
for (i = 0; i < items.length; i++)
{
items[i][property] += MathSmoothStep(i * step, min, max);
}
}
else
{
for (i = 0; i < items.length; i++)
{
items[i][property] = MathSmoothStep(i * step, min, max);
}
}
return items;
};
module.exports = SmoothStep;