// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Preview a four-by-four ordered dither
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set GREY0..1. Touch for owner-only numeric output.
// Stop / restore: Remove/disable; no colors or materials are applied.
// Notes: This is a tiny text preview, not a texture generator. Tile pattern is deterministic and spatially structured.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Color calculation only.
float GREY=0.4;
list BAYER=[0,8,2,10,12,4,14,6,3,11,1,9,15,7,13,5];
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(GREY<0.0||GREY>1.0)
        {
            llOwnerSay("Grey must be0..1.");
            return;
        }
        integer row;
        integer col;
        for(row=0;row<4;++row)
        {
            string line="";
            for(col=0;col<4;++col)
            {
                float threshold=(llList2Integer(BAYER,row*4+col)+0.5)/16.0;
                if(GREY>threshold)line+="#";
                else line+=".";
            }
            llOwnerSay(line);
        }
    }
}