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Anyone want text gradients?
local blue = math.min((b_step * step) + rgb1[3], 255)
gradient[step + 1] = {red, green, blue}
end
end
local colored_text = ""
for pos, color in ipairs(gradient) do
colored_text = colored_text .. "<" .. color[1] .. "," .. color[2] .. "," .. color[3] .. ">" .. string.sub(text, pos, pos)
end
return colored_text
endfunction gradient(rgb1, rgb2, text)
local clamp = function (num) return math.max(math.min(num, 255), 0) end
local rgb1 = {clamp(rgb1[1]), clamp(rgb1[2]), clamp(rgb1[3])}
local rgb2 = {clamp(rgb2[1]), clamp(rgb2[2]), clamp(rgb2[3])}
local gradient = {rgb1}
if #text == 1 then
local rgb = {}
for color = 1, 3 do rgb[color] = (rgb1[color] + rgb2[color]) / 2 end
return "<" .. rgb[1] .. "," .. rgb[2] .. "," .. rgb[3] .. ">" .. text
end
if #text == 2 then
gradient[2] = rgb2
else
local length = #text - 1
local r_step = math.floor(((rgb2[1] - rgb1[1]) / length) + 0.5)
local g_step = math.floor(((rgb2[2] - rgb1[2]) / length) + 0.5)
local b_step = math.floor(((rgb2[3] - rgb1[3]) / length) + 0.5)
for step = 1, length do
local red = math.min((r_step * step) + rgb1[1], 255)
local green = math.min((g_step * step) + rgb1[2], 255)
This expects to get two tables of numbers between 0-255 in {red, green, blue} format and the text you want formatted. It will return a string formatted for use with decho() in Mudlet. If you want it to just spit out the echo itself, change "return colored_text" to "decho(colored_text)". I hadn't seen this around and needed it for my system, so I threw it together at lunch, figured someone might find it neat.
2
(c) Iron Realms Entertainment 2012.
Comments
function gradient(rgb1, rgb2, text) local clamp = function (num) return math.max(math.min(num, 255), 0) end local rgb1 = {clamp(rgb1[1]), clamp(rgb1[2]), clamp(rgb1[3])} local rgb2 = {clamp(rgb2[1]), clamp(rgb2[2]), clamp(rgb2[3])} local gradient = {rgb1} if #text == 1 then local rgb = {} for color = 1, 3 do rgb[color] = (rgb1[color] + rgb2[color]) / 2 end return "<" .. rgb[1] .. "," .. rgb[2] .. "," .. rgb[3] .. ">" .. text end if #text == 2 then gradient[2] = rgb2 else local length = #text - 1 local r_step = ((rgb2[1] - rgb1[1]) / length) + 0.5 local g_step = ((rgb2[2] - rgb1[2]) / length) + 0.5 local b_step = ((rgb2[3] - rgb1[3]) / length) + 0.5 if r_step < 0 then r_step = math.ceil(r_step) else r_step = math.floor(r_step) end if g_step < 0 then g_step = math.ceil(g_step) else g_step = math.floor(g_step) end if b_step < 0 then b_step = math.ceil(b_step) else b_step = math.floor(b_step) end for step = 1, length do local red = clamp((r_step * step) + rgb1[1], 255) local green = clamp((g_step * step) + rgb1[2], 255) local blue = clamp((b_step * step) + rgb1[3], 255) gradient[step + 1] = {red, green, blue} end end local colored_text = "" for pos, color in ipairs(gradient) do colored_text = colored_text .. "<" .. color[1] .. "," .. color[2] .. "," .. color[3] .. ">" .. string.sub(text, pos, pos) end return colored_text endDo you mind if I port and share your function for Nexus?
Added a loop function so the gradient turns around.
<br><div>grd = (function() { </div><div> var gen = function(rgba1, rgba2, text, loop) { </div><div> var clamp = function(num) { return Math.max(Math.min(num, 255), 0) } </div><div> var rgba1 = [ clamp(rgba1[0]), clamp(rgba1[1]), clamp(rgba1[2]) ] </div><div> var rgba2 = [ clamp(rgba2[0]), clamp(rgba2[1]), clamp(rgba2[2]) ] </div><div> var gradn = [ rgba1 ] </div><div> if (text.length == 1) { </div><div> var rgb = [] </div><div> for (var color=0; color<3; color++) { rgb[color] = ( rgba1[color] + rgba2[color] ) / 2 } </div><div> return 'style="color:rgba('+rgb[0]+','+rgb[1]+','+rgb[2]+');"' } </div><div> if (text.length == 2) { </div><div> gradn[1] = rgba2 </div><div> } else { </div><div> var len = text.length - 1 </div><div> if (loop) { len = Math.floor((len + 1) / 2) } </div><div> var rs = Math.floor(((rgba2[0] - rgba1[0]) / len) + 0.5) </div><div> var gs = Math.floor(((rgba2[1] - rgba1[1]) / len) + 0.5) </div><div> var bs = Math.floor(((rgba2[2] - rgba1[2]) / len) + 0.5) </div><div> for (var step=0; step<len; step++) { </div><div> var red = Math.min((rs * step) + rgba1[0], 255) </div><div> var gre = Math.min((gs * step) + rgba1[1], 255) </div><div> var blu = Math.min((bs * step) + rgba1[2], 255) </div><div> gradn[step] = [red,gre,blu] </div><div> } </div><div> gradn.push(rgba2) </div><div> if (loop) { </div><div> for (var i=(gradn.length-1); i>0; i--) { </div><div> gradn.push( gradn[i] ) </div><div> } </div><div> if (gradn.length > text.length) { </div><div> gradn.slice(0, text.length) </div><div> } </div><div> } </div><div> } </div><div> return gradn </div><div> } </div><div> </div><div> return { </div><div> gen : gen, </div><div> } </div><div>})() </div>A bit verbose but works.
- Split the code into cgradient() and dgradient(), to work with cecho() or decho().
- Added the ability to generate the gradients as tables with cgradient_table() and dgradient_table(). This will output a table with integer keys corresponding to character number in the given string and values each being a table with the first index a three value table containing the RGB values and the second index the character itself, e.g. {{255, 255, 255}, "a"}.
- cgradient() and dgradient() will each accept a string argument followed by any number of color nodes formatted as tables of the form {r, g, b}.
Future plans:This is a comparison between dgradient() and cgradient(), respectively, over three different gradients. The middle is simple {255,0,0}-{0,0,255} red to blue, but the first shows off the ability to feed in multiple nodes, being an input of seven nodes: {255,0,0}, {255,128,0}, {255,255,0}, {0,255,0}, {0,255,255}, {0,128,255}, {128,0,255}. The final pair is simply {50,50,50}, {0,255,0}, {50,50,50}.
function _clamp(num1, num2, num3) local smaller = math.min(num2, num3) local larger = math.max(num2, num3) local minimum = math.max(0, smaller) local maximum = math.min(255, larger) return math.min(maximum, math.max(minimum, num1)) end function _gradient(length, rgb1, rgb2) assert(length > 0) if length == 1 then return {rgb1} elseif length == 2 then return {rgb1, rgb2} else local color_range = {} local step = {} for color = 1, 3 do step[color] = (rgb2[color] - rgb1[color]) / (length - 2) end local gradient = {rgb1} for iter = 1, length - 2 do gradient[iter + 1] = {} for color = 1, 3 do gradient[iter + 1][color] = math.ceil(rgb1[color] + (iter * step[color])) end end gradient[length] = rgb2 for index, color in ipairs(gradient) do for iter = 1, 3 do gradient[index][iter] = _clamp(color[iter], rgb1[iter], rgb2[iter]) end end return gradient end end function _gradients(length, ...) local arg = {...} if #arg == 0 then return {} elseif #arg == 1 then return arg[1] elseif #arg == 2 then return _gradient(length, arg[1], arg[2]) else local quotient = math.floor(length / (#arg - 1)) local remainder = length % (#arg - 1) local gradients = {} for section = 1, #arg - 1 do local length = quotient if section <= remainder then length = length + 1 end local gradient = _gradient(length, arg[section], arg[section + 1]) for _, rgb in ipairs(gradient) do table.insert(gradients, rgb) end end return gradients end end function color_name(rgb) local least_distance = math.huge local color_name = "" for name, color in pairs(color_table) do color_distance = math.sqrt((color[1] - rgb[1])^2 + (color[2] - rgb[2])^2 + (color[3] - rgb[3])^2) if color_distance < least_distance then least_distance = color_distance color_name = name end end return color_name end function dgradient_table(text, ...) local gradients = _gradients(#text, ...) local dgradient = {} for character = 1, #text do table.insert(dgradient, {gradients[character], text:sub(character, character)}) end return dgradient end function dgradient(text, ...) local gradients = _gradients(#text, ...) local dgradient = "" for character = 1, #text do dgradient = dgradient .. "<" .. table.concat(gradients[character], ",") .. ">" .. text:sub(character, character) end return dgradient end function cgradient_table(text, ...) local gradients = _gradients(#text, ...) local cgradient = {} for character = 1, #text do table.insert(cgradient, {color_name(gradients[character]), text:sub(character, character)}) end return cgradient end function cgradient(text, ...) local gradients = _gradients(#text, ...) local cgradient = "" for character = 1, #text do cgradient = cgradient .. "<" .. color_name(gradients[character]) .. ">" .. text:sub(character, character) end return cgradient endThe same code is attached as a text file if that's more convenient.decho(dgradient("sentence here", {50,50,50}, {0,255,0}, {50,50,50}))
Estarra the Eternal says, "Give Shevat the floor please."