Utility functions for swapping a 1D / 2D matrix ordering.

MatrixOrder.as

/**
 * |0|3|6| => 0 3 6
 * | | | | => -----
 * |1|4|7| => 1 4 7
 * | | | | => -----
 * |2|5|8| => 2 5 8
 *
 * [0,1,2,3,4,5,6,7,8] => [0,3,6,1,4,7,2,5,8]
 *
 */
public static function verticalToHorizontalOrder(arr:Array, width:uint, height:uint):Array
{
	if (!arr)
		return null;
		
	var newArr:Array	= new Array();
	
	for (var i:int = 0; i < arr.length; ++i)
	{
		newArr[i]	= arr[Math.floor(i / width) + height * (i % width)];
	}
	
	return newArr;
}

/**
 * 0 1 2 => |0|1|2|
 * ----- => | | | |
 * 3 4 5 => |3|4|5|
 * ----- => | | | |
 * 6 7 8 => |6|7|8|
 *
 * [0,1,2,3,4,5,6,7,8] => [0,3,6,1,4,7,2,5,8]
 */
public static function horizontalToVerticalOrder(arr:Array, width:uint, height:uint):Array
{
	if (!arr)
		return null;
		
	var newArr:Array	= new Array();
	for (var i:int = 0; i < arr.length; ++i)
	{
		newArr[i]	= arr[Math.floor(i / height) + width * (i % height)];
	}
	
	return newArr;
}