-- Randomly returns either 1 or -1.
function randomSign()
	local ranNum = random()
	if (ranNum > 0.5) then
		return 1
	else
		return -1
	end
end


-- Randomly returns either 1 or 0.
function randomBit()
	local ranNum = random()
	if (ranNum > 0.5) then
		return 1
	else
		return 0
	end
end


-- Works just like random(), but can accept zero as an argument.
function random2(fVal1, fVal2)
	if (fVal2) then
		if ((fVal2 - fVal1) == 0) then
			return fVal2
		else
			return random(fVal1, fVal2)
		end
	elseif (fVal1) then
		if (fVal1 == 0) then
			return 0
		else
			return random(fVal1)
		end
	else
		return random()
	end
end


-- Works just like random(), but can accept zero as an argument and always returns a float value, not an integer.
function random3(fVal1, fVal2)
	if (fVal2) then
		local tmpVal = random() * (fVal2 - fVal1)
		return fVal1 + tmpVal
	elseif (fVal1) then
		return random() * fVal1
	else
		return random()
	end
end