WoW:USERAPI HexToRGBPerc: Difference between revisions

WoW:USERAPI HexToRGBPerc (source)

377 bytes added , 30 September 2007

m

Increased the function's Intelligence.

Anonymous user

@@ Line 2: / Line 2: @@
 __NOTOC__
-Takes a hex string (must be 6 char long!) and converts it to a RGB percent set (0.0-1.0)
+Takes a hex string (must be 3 or 6 chars long!) and converts it to a RGB percent set (0.0-1.0). If ''hex'' is invalid, return black (0,0,0).
   local function HexToRGBPerc(hex)
- 	local rhex, ghex, bhex = string.sub(hex, 1, 2), string.sub(hex, 3, 4), string.sub(hex, 5, 6)
+     local rhex, ghex, bhex, base
- 	return tonumber(rhex, 16)/255, tonumber(ghex, 16)/255, tonumber(bhex, 16)/255
+     if strlen(hex) == 6 then
+         rhex, ghex, bhex = strmatch('([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})', hex)
+         base = 255
+     elseif strlen(hex) == 3 then
+         rhex, ghex, bhex = strmatch('([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])', hex)
+         base = 16
+     end
+     if not (rhex and ghex and bhex) then
+         return 0, 0, 0
+     else
+         return tonumber(rhex, 16)/base, tonumber(ghex, 16)/base, tonumber(bhex, 16)/base
+     end
   end