In my color wheel I am converting mouse-pos relative to the wheel into color.
local h = (math.pi - math.atan2(ColorPickCenter.Y - Center.Y, ColorPickCenter.X - Center.X)) / (math.pi * 2)
local s = (Center - ColorPickCenter).Magnitude / (ColorWheel.AbsoluteSize.X/2)
Although, I am trying to convert this color back into position. I tried
local undoH1 = math.cos((math.pi + h) * (2 * math.pi))
local undoH2 = math.sin((math.pi + h) * (2 * math.pi))
local X, Y = (undoH1 + 1)/2 * s, (undoH2 + 1)/2 * s
local OffY, OffX = math.ceil(ColorWheel.AbsoluteSize.X*X), math.ceil(ColorWheel.AbsoluteSize.Y*Y)
Although this yielded no good results: https://gyazo.com/eda5868ec0876979a5cb415785cc057a
As you can see (output), OG Offset is equivalent to the mouse offset, H/S to mouse is my conversion of color back into position.
Just simplifying it a bit:
local angle = math.pi - h * 2 * math.pi
local r = ColorWheel.AbsoluteSize.X / 2
local x = r * math.cos(angle)
local y = r * math.sin(angle)
Based on how you’re defining h I’m assuming that you’re storing h as a number from 0 to 1, where 0 is on the left edge and it increases clockwise?
I can’t quite pinpoint the increase/decrease of values on the colorwheel, although, this gif best describes the issue with your code: (referring to the simplification you sent above, please keep in mind the differences in the values)
https://gyazo.com/1ecfee747bfe36c5ad1bd704bd68aa5a
Honestly, the O.G. values don’t look quite right to me in the first place. How are you printing them?
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I apologize for responding quite late but I figured out an alternative.
local Angle = math.pi - h * 2 * math.pi
local R = s (original value, refer to top line of code on page) * ColorWheel.AbsoluteSize.X / 2
local X = R * math.cos(Angle)
local Y = R * math.sin(Angle)
then adding the origin pos of the color wheel yielded correct values
Oh sorry man, I meant to write that s * . Glad you figured it out 
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