color wheel in gimp method?

[Ottia Tuota]

Another way to draw the figure is my new (and very unfinished) plugin Simple parametric curve.

I show first the result:

   

The plugin makes this as two vectors objects as follows:

   

These could then be stroked. Since you already got other solutions, I don't go to details. I just say that the plugin is obtained here (see the first post):

https://www.gimp-forum.net/Thread-Parametric-curves

and to draw the figure you tell the plugin to take inputs from a file. That file must be created before-hand. I draw the above figure with a file with the following contents:

Code:

# Pie. Input file for the plugin Simple parametric curve.

N = 9

center = [500,500]
scale = 300

curve_name = 'Pie'

def function(t):
   return [cos(t),sin(t)]

interval = [0,2*pi]

mark_linesegments = [
                    [[0,0], function(i*2*pi/N)] for i in range(N)
                   ]