// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Read hue, saturation and value from RGB
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set RGB components0..1. Touch for owner-only numeric output.
// Stop / restore: Remove/disable; no colors or materials are applied.
// Notes: Achromatic colors have undefined hue; this example reports zero for that case.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Color calculation only.
vector RGB=<0.2,0.7,0.4>;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(RGB.x<0.0||RGB.y<0.0||RGB.z<0.0||RGB.x>1.0||RGB.y>1.0||RGB.z>1.0)
        {
            llOwnerSay("RGB must be0..1.");
            return;
        }
        float high=RGB.x;
        float low=RGB.x;
        if(RGB.y>high)high=RGB.y;
        if(RGB.z>high)high=RGB.z;
        if(RGB.y<low)low=RGB.y;
        if(RGB.z<low)low=RGB.z;
        float delta=high-low;
        float hue;
        float saturation;
        if(high>0.0)saturation=delta/high;
        if(delta>0.000001)
        {
            if(high==RGB.x)hue=(RGB.y-RGB.z)/delta;
            else if(high==RGB.y)hue=2.0+(RGB.z-RGB.x)/delta;
            else hue=4.0+(RGB.x-RGB.y)/delta;
            hue*=60.0;
            if(hue<0.0)hue+=360.0;
        }
        llOwnerSay("HSV="+(string)<hue,saturation,high>);
    }
}