1 files changed, 61 insertions, 0 deletions
diff --git a/clientmods/chat/rainbow.lua b/clientmods/chat/rainbow.lua
new file mode 100644
index 000000000..1519619a7
--- /dev/null
+++ b/clientmods/chat/rainbow.lua
@@ -0,0 +1,61 @@
+local function rgb_to_hex(rgb)
+	local hexadecimal = '#'
+
+	for key, value in pairs(rgb) do
+		local hex = ''
+
+		while(value > 0)do
+			local index = math.fmod(value, 16) + 1
+			value = math.floor(value / 16)
+			hex = string.sub('0123456789ABCDEF', index, index) .. hex			
+		end
+
+		if(string.len(hex) == 0)then
+			hex = '00'
+
+		elseif(string.len(hex) == 1)then
+			hex = '0' .. hex
+		end
+
+		hexadecimal = hexadecimal .. hex
+	end
+
+	return hexadecimal
+end
+
+local function color_from_hue(hue)
+	local h = hue / 60
+	local c = 255
+	local x = (1 - math.abs(h%2 - 1)) * 255
+
+  	local i = math.floor(h);
+  	if (i == 0) then
+		return rgb_to_hex({c, x, 0})
+  	elseif (i == 1) then 
+		return rgb_to_hex({x, c, 0})
+  	elseif (i == 2) then 
+		return rgb_to_hex({0, c, x})
+	elseif (i == 3) then
+		return rgb_to_hex({0, x, c});
+	elseif (i == 4) then
+		return rgb_to_hex({x, 0, c});
+	else 
+		return rgb_to_hex({c, 0, x});
+	end
+end
+
+return function(input)
+	local step = 360 / input:len()
+	local hue = 0
+	local output = ""
+	for i = 1, input:len() do
+		local char = input:sub(i,i)
+		if char:match("%s") then
+			output = output .. char
+		else
+        	output = output  .. minetest.get_color_escape_sequence(color_from_hue(hue)) .. char 
+		end
+        hue = hue + step
+	end
+	return output
+end