Sort HSL colors

thesupershinobi

Hello, I would like some help to write an algorithm to sort HSL colors from an 512 colors.

I understood that I had to use the hue, saturation and lightness values to order the colors, but I can not get a gradient.

Do you have an example or an indication to give me?

Thanks in advance.

MajidKamali

use std::sort with a custom Comparer that gives hsl as input
https://en.cppreference.com/w/cpp/algorithm/sort

thesupershinobi

Hello thanks for your reply.

I alreay use this function for sort the QVector<QColor> but the result is not very good.

The best result is this comparaison :

int compare(const QColor &a, const QColor &b)
{
    return a.rgb() < b.rgb();
}

I wrote this code, but the colors the sort does not give a result does not give a gradient.

int compare(const QColor &a, const QColor &b)
{
    if(a.hue() == b.hue())
    {
        if(a.saturation() == b.saturation())
        {
            return (a.lightness() <= b.lightness());
        }
       return (a.saturation() <= b.saturation());
    }
    return (a.hue() < b.hue());
}