// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Convert to and from premultiplied alpha
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set RGB and ALPHA0..1. Touch for owner-only numeric output.
// Stop / restore: Remove/disable; no colors or materials are applied.
// Notes: Zero alpha contains no recoverable RGB in premultiplied form. This is a data representation tool, not a viewer alpha-mode setter.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Color calculation only.
vector RGB=<0.8,0.3,0.1>;
float ALPHA=0.4;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(ALPHA<0.0||ALPHA>1.0)
        {
            llOwnerSay("Alpha must be0..1.");
            return;
        }
        vector premultiplied=RGB*ALPHA;
        llOwnerSay("Premultiplied="+(string)premultiplied);
        if(ALPHA>0.000001)llOwnerSay("Recovered="+(string)(premultiplied/ALPHA));
        else llOwnerSay("Zero alpha: source RGB is unrecoverable.");
    }
}