// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Locate a frame inside an atlas
// Not compiled or tested in-world
// Setup: Place in a spare owned prim. Set COLUMNS, ROWS and zero-based FRAME. Touch for owner-only output.
// Stop / restore: Remove/disable. The script calculates only; no scene properties change.
// Notes: Row zero starts at the top of the image; V coordinates are reported bottom-up. Texture animation APIs may use their own order.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Planning only.
integer COLUMNS=4;
integer ROWS=3;
integer FRAME=6;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(COLUMNS<1||ROWS<1||COLUMNS>64||ROWS>64||FRAME<0||FRAME>=COLUMNS*ROWS)
        {
            llOwnerSay("Invalid atlas dimensions/frame.");
            return;
        }
        integer column=FRAME%COLUMNS;
        integer row=FRAME/COLUMNS;
        float left=(float)column/(float)COLUMNS;
        float right=(float)(column+1)/(float)COLUMNS;
        float top=1.0-(float)row/(float)ROWS;
        float bottom=1.0-(float)(row+1)/(float)ROWS;
        llOwnerSay("Column="+(string)column+" row="+(string)row+" bounds U="+(string)left+".."+(string)right+" V="+(string)bottom+".."+(string)top);
    }
}