// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Own-object terrain-clearance monitor
// Not compiled or tested in-world
// Setup: Owner-touch arms a one-second check on a demonstration object.
// Stop / restore: Owner-touch to disarm before removing. No physical status or movement is changed.
// Notes: No avatar surveillance or visitor history. Center clearance is not bottom clearance. Mesh floors are excluded; this does not stop a fall.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer armed;
integer low;
default
{
    touch_start(integer n)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        armed=!armed;
        if(armed)
        {
            low=FALSE;
            llSetTimerEvent(1.0);
            llOwnerSay("Monitor armed.");
        }
        else
        {
            llSetTimerEvent(0.0);
            llOwnerSay("Monitor off.");
        }
    }
    timer()
    {
        if(!armed)return;
        vector p=llGetPos();
        float c=p.z-llGround(ZERO_VECTOR);
        if(!low&&c<0.5)
        {
            low=TRUE;
            llOwnerSay("Object center is within 0.5 m of terrain.");
        }
        else if(low&&c>0.8)
        {
            low=FALSE;
            llOwnerSay("Terrain clearance recovered.");
        }
    }
}