Source: src/gameobjects/components/Overlap.js

/**
* @author       Richard Davey <rich@photonstorm.com>
* @copyright    2015 Photon Storm Ltd.
* @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/

/**
* The Overlap component allows a Game Object to check if it overlaps with the bounds of another Game Object.
*
* @class
*/
Phaser.Component.Overlap = function () {};

Phaser.Component.Overlap.prototype = {

    /**
    * Checks to see if the bounds of this Game Object overlaps with the bounds of the given Display Object, 
    * which can be a Sprite, Image, TileSprite or anything that extends those such as Button or provides a `getBounds` method and result.
    * 
    * This check ignores the `hitArea` property if set and runs a `getBounds` comparison on both objects to determine the result.
    * 
    * Therefore it's relatively expensive to use in large quantities, i.e. with lots of Sprites at a high frequency.
    * It should be fine for low-volume testing where physics isn't required.
    *
    * @method
    * @param {Phaser.Sprite|Phaser.Image|Phaser.TileSprite|Phaser.Button|PIXI.DisplayObject} displayObject - The display object to check against.
    * @return {boolean} True if the bounds of this Game Object intersects at any point with the bounds of the given display object.
    */
    overlap: function (displayObject) {

        return Phaser.Rectangle.intersects(this.getBounds(), displayObject.getBounds());

    }

};