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Copyright (c) 2011 Mike Chambers

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QuadTree implementation in JavaScript.

Created by Mike Chambers
http://www.mikechambers.com
mikechambers@gmail.com

Currently supports mapping 2d coordinates and items with bounds.

http://www.mikechambers.com/blog/2011/03/21/javascript-quadtree-implementation/

There are a number of examples included which show different parts of using the tree.

examples/collision.html : Shows how to use the QuadTree to optimize collision detection of circles of multiple sizes

examples/insert.html : Shows how to insert points, and visually displays the nodes of the QuadTree.

examples/insert_bounds.html : Shows how to insert items with dimensions / bounds, and visually displays the nodes of the QuadTree.

examples/retrieve.html : Shows how to retrieve points in the same node as a specified point.

examples/retrieve_bounds.html : Shows how to retrieve items in the same node as a specified item with bounds. 



-------------Point QuadTree Example--------------
var pointQuad = true;
var bounds = {
			x:0,
			y:0,
			width:canvas.width,
			height:canvas.height
}
var quad = new QuadTree(bounds, pointQuad);

//insert a random point
quad.insert({x:12, y:25});

var items = quad.retrieve({x:11, y:20});
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-------------Point QuadTree Example--------------
var bounds = {
			x:0,
			y:0,
			width:canvas.width,
			height:canvas.height
}
var quad = new QuadTree(bounds);

//insert a random point
quad.insert({
		x:12, 
		y:25,
		height:10,
		width:25});
		
var items = quad.retrieve({x:11, y:20, height:10, width:20});		
	
---------------------------------------------------