<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>src/jquery.collision.js</title>
<link rel="stylesheet" href="http://yui.yahooapis.com/3.5.1/build/cssgrids/cssgrids-min.css">
<link rel="stylesheet" href="../assets/vendor/prettify/prettify-min.css">
<link rel="stylesheet" href="../assets/css/main.css" id="site_styles">
<link rel="shortcut icon" type="image/png" href="../assets/favicon.png">
<script src="http://yui.yahooapis.com/combo?3.5.1/build/yui/yui-min.js"></script>
</head>
<body class="yui3-skin-sam">
<div id="doc">
<div id="hd" class="yui3-g header">
<div class="yui3-u-3-4">
<!-- <h1><img src="../assets/css/logo.png" title=""></h1> -->
<h1><img src="http://ducksboard.com/wp-content/themes/blog-theme-ducksboard/images/ducksboard.png" title=""></h1>
</div>
<div class="yui3-u-1-4 version">
<em>API Docs for: </em>
</div>
</div>
<div id="bd" class="yui3-g">
<div class="yui3-u-1-4">
<div id="docs-sidebar" class="sidebar apidocs">
<div id="api-list">
<h2 class="off-left">APIs</h2>
<div id="api-tabview" class="tabview">
<ul class="tabs">
<li><a href="#api-classes">Classes</a></li>
<li><a href="#api-modules">Modules</a></li>
</ul>
<div id="api-tabview-filter">
<input type="search" id="api-filter" placeholder="Type to filter APIs">
</div>
<div id="api-tabview-panel">
<ul id="api-classes" class="apis classes">
<li><a href="../classes/Collision.html">Collision</a></li>
<li><a href="../classes/Coords.html">Coords</a></li>
<li><a href="../classes/Gridster.html">Gridster</a></li>
</ul>
<ul id="api-modules" class="apis modules">
</ul>
</div>
</div>
</div>
</div>
</div>
<div class="yui3-u-3-4">
<div id="api-options">
Show:
<label for="api-show-inherited">
<input type="checkbox" id="api-show-inherited" checked>
Inherited
</label>
<label for="api-show-protected">
<input type="checkbox" id="api-show-protected">
Protected
</label>
<label for="api-show-private">
<input type="checkbox" id="api-show-private">
Private
</label>
<label for="api-show-deprecated">
<input type="checkbox" id="api-show-deprecated">
Deprecated
</label>
</div>
<div class="apidocs">
<div id="docs-main">
<div class="content">
<h1 class="file-heading">File: src/jquery.collision.js</h1>
<div class="file">
<pre class="code prettyprint linenums">
/*
* jquery.collision
* https://github.com/ducksboard/gridster.js
*
* Copyright (c) 2012 ducksboard
* Licensed under the MIT, GPL licenses.
*/
;(function($, window, document, undefined){
var defaults = {
colliders_context: document.body,
on_overlap: function(collider_data){},
on_overlap_start : function(collider_data){
// console.log('the element START being a collider', collider_data);
},
on_overlap_stop : function(collider_data){
// console.log('the element STOP being a collider', collider_data);
}
};
/**
* Collision
*
* @class Collision
* @uses Coords
* @param {HTMLElement} element An Attribute name or object property path
* @param {String|HTMLElement|Array} colliders An Attribute name or object property path
* @param {Object} [options] An Attribute name or object property path
* @param {Function} [options.on_overlap] An Attribute name or object property path
* @param {Function} [options.on_overlap_start] An Attribute name or object property path
* @param {Function} [options.on_overlap_stop] An Attribute name or object property path
* @return {Object} dasdasdadasd
* @constructor
*/
function Collision(element, colliders, options) {
this.options = $.extend(defaults, options);
this.$element = element;
this.last_colliders = [];
this.last_colliders_coords = [];
if (typeof colliders === 'string' || colliders instanceof jQuery) {
this.$colliders = $(colliders,
this.options.colliders_context).not(this.$element);
}else{
this.colliders = $(colliders);
}
this.init();
}
var fn = Collision.prototype;
fn.init = function() {
this.find_collisions();
};
fn.overlaps = function(a, b) {
var x = false;
var y = false;
if ((b.x1 >= a.x1 && b.x1 <= a.x2) ||
(b.x2 >= a.x1 && b.x2 <= a.x2) ||
(a.x1 >= b.x1 && a.x2 <= b.x2)
) { x = true; }
if ((b.y1 >= a.y1 && b.y1 <= a.y2) ||
(b.y2 >= a.y1 && b.y2 <= a.y2) ||
(a.y1 >= b.y1 && a.y2 <= b.y2)
) { y = true; }
return (x && y);
};
fn.detect_overlapping_region = function(a, b){
var regionX = '';
var regionY = '';
if (a.y1 > b.cy && a.y1 < b.y2) { regionX = 'N'; }
if (a.y2 > b.y1 && a.y2 < b.cy) { regionX = 'S'; }
if (a.x1 > b.cx && a.x1 < b.x2) { regionY = 'W'; }
if (a.x2 > b.x1 && a.x2 < b.cx) { regionY = 'E'; }
return (regionX + regionY) || 'C';
};
fn.calculate_overlapped_area_coords = function(a, b){
var x1 = Math.max(a.x1, b.x1);
var y1 = Math.max(a.y1, b.y1);
var x2 = Math.min(a.x2, b.x2);
var y2 = Math.min(a.y2, b.y2);
return $({
left: x1,
top: y1,
width : (x2 - x1),
height: (y2 - y1)
}).coords().get();
};
fn.calculate_overlapped_area = function(coords){
return (coords.width * coords.height);
};
fn.manage_colliders_start_stop = function(new_colliders_coords, start_callback, stop_callback){
var last = this.last_colliders_coords;
for (var i = 0, il = last.length; i < il; i++) {
if ($.inArray(last[i], new_colliders_coords) === -1) {
start_callback.call(this, last[i]);
}
}
for (var j = 0, jl = new_colliders_coords.length; j < jl; j++) {
if ($.inArray(new_colliders_coords[j], last) === -1) {
stop_callback.call(this, new_colliders_coords[j]);
}
}
};
fn.find_collisions = function(){
var self = this;
var colliders_coords = [];
var colliders_data = [];
var $colliders = (this.colliders || this.$colliders);
var count = $colliders.length;
while(count--){
var $collider = self.$colliders ? $($colliders[count]) : $colliders[count];
var player_coords = self.$element.coords().update().get();
var $collider_coords_ins = ($collider.isCoords) ?
$collider.update() : $collider.coords();
var collider_coords = $collider_coords_ins.get();
var overlaps = self.overlaps(player_coords, collider_coords);
if (!overlaps) {
continue;
}
var region = self.detect_overlapping_region(player_coords,
collider_coords);
//todo: make this if customizable
if (region === 'C'){
var area_coords = self.calculate_overlapped_area_coords(
player_coords, collider_coords);
var area = self.calculate_overlapped_area(area_coords);
var collider_data = {
area: area,
area_coords : area_coords,
region: region,
coords: collider_coords,
player_coords: player_coords,
el: $collider
};
self.options.on_overlap.call(this, collider_data);
colliders_coords.push($collider_coords_ins);
colliders_data.push(collider_data);
}
}
this.manage_colliders_start_stop(colliders_coords,
self.options.on_overlap_stop, self.options.on_overlap_start);
this.last_colliders_coords = colliders_coords;
return colliders_data;
};
fn.get_closest_colliders = function(){
var colliders = this.find_collisions();
var min_area = 100;
colliders.sort(function(a, b){
if (a.area <= min_area) {
return 1;
}
/* if colliders are being overlapped by the "C" (center) region,
* we have to set a lower index in the array to which they are placed
* above in the grid. */
if (a.region === 'C' && b.region === 'C') {
if (a.coords.y1 < b.coords.y1 || a.coords.x1 < b.coords.x1) {
return - 1;
}else{
return 1;
}
}
if (a.area < b.area){
return 1;
}
return 1;
});
return colliders;
};
//jQuery adapter
$.fn.collision = function(collider, options) {
return new Collision( this, collider, options );
};
}(jQuery, window, document));
</pre>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="../assets/vendor/prettify/prettify-min.js"></script>
<script>prettyPrint();</script>
<script src="../assets/js/yui-prettify.js"></script>
<script src="../assets/../api.js"></script>
<script src="../assets/js/api-filter.js"></script>
<script src="../assets/js/api-list.js"></script>
<script src="../assets/js/api-search.js"></script>
<script src="../assets/js/apidocs.js"></script>
</body>
</html>