rgb2hex & hex2rbg

sslivka

function rgb2hex1(r, g, b) local rgb, i, m, hex, hexABC = r*65536 + g*256 + b, 0, 0, "", "0123456789ABCDEF" while rgb > 0 do i = i + 1 rgb, m = math.floor(rgb/16), math.fmod(rgb, 16) + 1 hex = string.sub(hexABC, m, m) .. hex end local switch = {[4] = "00" .. hex, [5] = "0" .. hex, [6] = hex} return "0x" .. switch[#hex] end   function rgb2hex2(r, g, b) return r*65536 + g*256 + b end   function hex2rbg(hex) local rgb, d = {}, {65536, 256, 1} for i = 1, 3 do rgb[i] = math.floor(hex/d[i]) hex = math.fmod(hex, d[i]) end return rgb[1], rgb[2], rgb[3] end   print(rgb2hex1(163, 54, 90)) application:setBackgroundColor(rgb2hex2(163, 54, 90)) print(hex2rbg(0xA3365A))

ar2rsawseen

@ssilvka cool
Additionally:

local rgb_to_hsl = function(r, g, b) r = r/255 g = g/255 b = b/255 local max = math.max(r, g, b) local min = math.min(r, g, b) local h local s local l = (max + min) / 2 if(max == min) then --achromatic h = 0 s = 0 else local d = max - min if(l > 0.5) then s = d / (2 - max - min) else s = d / (max + min) end   if max == r then if g < b then h = (g - b) / d + 6 else h = (g - b) / d end elseif max == g then h = (b - r) / d + 2 elseif max == b then h = (r - g) / d + 4 end h = h / 6 end return math.floor(h*360 + 0.5), math.floor(s*100 + 0.5), math.floor(l*100 + 0.5) end   local hsl_to_rgb = function(h, s, l) h = h/360 s = s/100 l = l/100 local r, g, b if(s == 0) then --achromatic r = 1 g = 1 b = l else local q if l < 0.5 then q = l * (1 + s) else q = l + s - l * s end local p = 2 * l - q r = hue_to_rgb(p, q, h + 1/3) g = hue_to_rgb(p, q, h) b = hue_to_rgb(p, q, h - 1/3) end return math.floor(r * 255 + 0.5), math.floor(g * 255 + 0.5), math.floor(b * 255 + 0.5) end   local hue_to_rgb = function(p, q, t) if(t < 0) then t = t + 1 end if(t > 1) then t = t - 1 end if(t < 1/6) then return p + (q - p) * 6 * t end if(t < 1/2) then return q end if(t < 2/3) then return p + (q - p) * (2/3 - t) * 6 end return p end   local h, s, l = rgb_to_hsl(35,9,34) print(h.." "..s.." "..l)

sslivka

@ar2rsawseen, maybe you know where I can get Color Picker component for Gideros?

ar2rsawseen

you mean like provide selecting a color inside app?
Sorry don't remember seeing anything like that, but if someone would have such component, it would most probably be @OZApps

OZApps

you mean like provide selecting a color inside app?
Sorry don't remember seeing anything like that, but if someone would have such component, it would most probably be @OZApps

I had created one long before adopting Gideros, so it was made in BeerSDK and there was a video on one of the sites (now Posterous has taken it down, the problem with free services, you just do not know when they will take it down, like Geocities, etc in the past)

OZApps

I managed to get the data from Posterous and I found the link to the color picker video, you can see it here

john26

I've often wondered why Gideros insists on colours being entered as a single number. OpenGL specifies them as (R,G,B) triplets which is also easier for the user. Behind the scenes Gideros must be unpacking to (R,G,B) anyway...?