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Tweening Color3 values in sequence?

Asked 1,287 views1 answers

So I'm trying to create a smooth transition between Color3 values, in a rainbow-like effect. I've come up this conclusion:

local function TweenColor(gui,new,prop,time)
	local v = gui[prop]
	time = time * 30
	local saved = {
		r=new.r-v.r;
		g=new.g-v.g;
		b=new.b-v.b;
	}
	for i = 1,time do
		gui[prop] = Color3.new(
			gui[prop].r+saved.r/time,
			gui[prop].g+saved.g/time,
			gui[prop].b+saved.b/time
		)
		wait()
	end
end

This will tween color A, to color B very smoothly. However, I still have yet to figure out a compact way to make a rainbow effect and have the function tween through all it's colors.

If anyone knows a good way to accomplish this, I'd very much appreciate it. Thanks.

Anonymous

1 comment

0

well a rainbow starts at red and goes to blue so start increasing red then increasing green and decreasing red and then the same with blue maybe

Anonymous#

1 answer

✓ Accepted answer

ProfessorSev's comment isn't far off. For the effect you're looking for, you could cycle the hue value and convert to RGB, as follows:

local hue = 0; -- this will cycle from 0-359
local SAT = 1; -- satutation; constant
local LUM = 1; -- luminance; constant

local SPEED = 1; -- hue degree/frame

function hsvToRgb(h, s, v) -- from https://github.com/EmmanuelOga/columns/blob/master/utils/color.lua - essentially ramps different values depending on which sixth 'h' is in
  local r, g, b

  local i = math.floor(h * 6);
  local f = h * 6 - i;
  local p = v * (1 - s);
  local q = v * (1 - f * s);
  local t = v * (1 - (1 - f) * s);

  i = i % 6

  if i == 0 then r, g, b = v, t, p
  elseif i == 1 then r, g, b = q, v, p
  elseif i == 2 then r, g, b = p, v, t
  elseif i == 3 then r, g, b = p, q, v
  elseif i == 4 then r, g, b = t, p, v
  elseif i == 5 then r, g, b = v, p, q
  end

  return r, g, b
end

-- the rainbow effect:

while (true) do
	color = hsvToRgb(hue/360, SAT, LUM);
	hue = (hue+SPEED)%360;
	wait()
end

That could be severely simplified, but the main loop is basically the logic.

AnonymousPermalink

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