Hex Color Picker in a GUI?

[chewie71]

I am making a mod where you can have colored wood. Instead of using dyes, I want to be able to have a Hex Color picker on a GUI and the user can pick a color they want, and then they get it that color.

 

Is this possible?

[larsgerrits]

You could write every pixel with a different Hex value on the gui and if they click, check if its on one of the pixels and set the wools hex value based on the one you clicked. PS i don't know how to do that, but its a rough idea

[chewie71]

That sounds like it will take ages.

 

I guess I will have to do the dyes ;(

[Draco18s]

There is a way to do it that won't take "days" but it is math heavy.

 

Essentially you'd have two loops (nested) that run from (0,0,0) to (hue1, hue2, hue3), depending on what the hue is (for red, it would be (255,0,0)).  The other loop would run from those values over to (y,y,y) for the black-to-white gradient.  Then you'd need a slider bar to change the hue value.

(You'd want to look up HVS to RGB conversion algorithms).