public synchronized void updateTurn()
	{
		if( turnDistance < 0)
		{
			while( turnDistance < 0)
			{
				if( Math.abs(turnDistance) < turnVelocity ) {
					heading -= Math.toRadians(Math.abs(turnDistance));
					turnDistance = 0;
				}
				else {
				heading -= Math.toRadians(turnVelocity);
				turnDistance += turnVelocity;
				}
				sleepForNow();
			}
		}
		else
		{
			while( turnDistance > 0)
			{
				if( Math.abs(turnDistance) < turnVelocity ) {
					heading += Math.toRadians(Math.abs(turnDistance));
					turnDistance = 0;
				}
				else {
				heading += Math.toRadians(turnVelocity);
				turnDistance -= turnVelocity;
				}
				sleepForNow();
			}
		}
	}