// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Composite one translucent color over another
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set source/destination colors and opacity values0..1. Touch for owner-only numeric output.
// Stop / restore: Remove/disable; no colors or materials are applied.
// Notes: The blend is performed directly in the supplied channel space; decode sRGB first for physically meaningful linear-light mixing.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Color calculation only.
vector SOURCE=<1.0,0.2,0.0>;
vector DEST=<0.0,0.2,1.0>;
float SA=0.4;
float DA=0.8;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(SA<0.0||SA>1.0||DA<0.0||DA>1.0)
        {
            llOwnerSay("Alphas must be0..1.");
            return;
        }
        float alpha=SA+DA*(1.0-SA);
        vector color=ZERO_VECTOR;
        if(alpha>0.000001)color=(SOURCE*SA+DEST*DA*(1.0-SA))/alpha;
        llOwnerSay("Composite RGB="+(string)color+" alpha="+(string)alpha);
    }
}