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<?php
/**
* Geo point 3D class.
*
* Zed. The immensity of stars. The HyperShip. The people.
*
* (c) 2010, Dereckson, some rights reserved.
* Released under BSD license.
*
* 0.1 2010-02-23 14:14 DcK
*
* @package Zed
* @subpackage Geo
* @author Sébastien Santoro aka Dereckson <dereckson@espace-win.org>
* @copyright 2010 Sébastien Santoro aka Dereckson
* @license http://www.opensource.org/licenses/bsd-license.php BSD
* @version 0.1
* @link http://scherzo.dereckson.be/doc/zed
* @link http://zed.dereckson.be/
* @filesource
*/
/**
* Geo point 3D class.
*
* This class reprensents a x, y, z point.
*
* It implements IteratorAggregate to allow the foreach instruction
* on a GeoPoint3D object:
*
* <code>
* $point = new GeoPoint3D(17, 24, -6);
* foreach ($point as $axis => $coordinate) {
* echo "\n\t$axis = $coordinate";
* }
* //This will output:
* // x = 17
* // y = 24
* // z = -6
* </code>
*
* The point 3D representation is xyz: [x, y, z] ; you can print it as a string
* and get this format:
*
* <code>
* $point = new GeoPoint3D(17, 24, -6);
* echo (string)$point; //will output xyz: [17, 24, -6]
* </code>
*
*/
class GeoPoint3D implements IteratorAggregate {
//
// x, y, z public properties
//
/**
* the x coordinate
*
* @var integer
*/
public $x;
/**
* the y coordinate
*
* @var integer
*/
public $y;
/**
* the z coordinate
*
* @var integer
*/
public $z;
//
// constructor / toString
//
/**
* Initializes a new instance of GeoPoint3D class
*/
function __construct ($x, $y, $z) {
$this->x = $x;
$this->y = $y;
$this->z = $z;
}
/**
* Returns a xyz: [x, y, z] string representation of the point coordinates
*
* @return string a xyz: [x, y, z] string representation of the coordinates
*/
function __toString () {
return sprintf("xyz: [%d, %d, %d]", $this->x, $this->y, $this->z);
}
//
// Implementing IteratorAggregate
//
/**
* Retrieves class iterator. It traverses x, y and z.
*
* @return Traversable the iterator
*/
function getIterator () {
return new ArrayIterator($this);
}
}
?>

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