local Ints = {1000, 900, 500, 400, 100,90, 50, 40, 10, 9, 5, 4, 1}
local Nums = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"}

function math.IntToRoman(int)
	if (int == 0) then return "N" end
	
	local Txt = ""
	
	if (int < 0) then Txt = "-" int = math.abs(int) end
	
	for i = 1, 13 do
		while (int >= Ints[i]) do
			int = int-Ints[i]
			Txt = Txt..Nums[i]
		end
	end
	
	return Txt
end

function math.IsFloat(num)
	return (math.floor(num) != math.ceil(num))
end

function math.AngleNormalize(ang)
	return Angle(math.NormalizeAngle(ang.p),math.NormalizeAngle(ang.y),math.NormalizeAngle(ang.r))
end

function math.Distance2Points(x1,y1,x2,y2)
	return math.sqrt((x2-x1)^2+(y2-y1)^2)
end

function math.Increment2Points(x1,y1,x2,y2)
	return (y2-y1)/(x2-x1)
end

function math.LinearAngle(x1,y1,x2,y2)
	return math.atan2(y2-y1,x2-x1) * 180 / math.pi
end

function math.SecondsToTime(secs)
	secs = math.floor(secs)
	
	local Txt	= ""
	
	for i = 0,2 do
		local It = 60^(2-i)
		local T = math.floor(secs/It)
		
		if (T<10) then Txt = Txt..":0"..T 
		else Txt = Txt..":"..T end
		
		secs = secs - T*It
	end
	
	return Txt:sub(2)
end