DKRandom.m

///**********************************************************************************************************************************
///  DKRandom.m
///  DrawKit ©2005-2008 Apptree.net
///
///  Created by graham on 08/10/2006.
///
///	 This software is released subject to licensing conditions as detailed in DRAWKIT-LICENSING.TXT, which must accompany this source file. 
///
///**********************************************************************************************************************************

#import "DKRandom.h"



@implementation DKRandom

+ (float)		randomNumber
{
	// returns a random value between 0 and 1.
	static unsigned long		seed = 0;

	if (seed == 0)
	{
		srandom([[NSDate date] timeIntervalSince1970]);
		seed = 1;
	}
	float randomNum = (float)random();
	randomNum /= (randomNum < 0) ? -2147483647.0f : 2147483647.0f;

	return randomNum;
}


+ (float)		randomPositiveOrNegativeNumber
{
	return [self randomNumber] - 0.5f;
}


@end