// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Predict closest approach of two moving points
// Not compiled or tested in-world
// Setup: Place in a spare owned prim. Set relative POSITION and VELOCITY. Touch for owner-only output.
// Stop / restore: Remove/disable. The script calculates only; no scene properties change.
// Notes: Negative closest time is clamped to now. Only supplied test vectors are used; no sensors or avatar data.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Planning only.
vector POSITION=<10.0,4.0,0.0>;
vector VELOCITY=<-2.0,-0.2,0.0>;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        float speed2=VELOCITY*VELOCITY;
        float t=0.0;
        if(speed2>0.000001)t=-(POSITION*VELOCITY)/speed2;
        if(t<0.0)t=0.0;
        llOwnerSay("Closest future time="+(string)t+" separation="+(string)llVecMag(POSITION+t*VELOCITY));
    }
}