// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Separate two overlapping aligned footprints
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set centers A/B and positive XY half-extents HA/HB. Touch for owner-only calculation output.
// Stop / restore: Remove/disable. Does not sense, collide with, or modify actual objects.
// Notes: Chooses one of equally minimal directions deterministically; it is not a swept collision solver.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Ideal geometry only.
vector A=ZERO_VECTOR;
vector B=<1.5,0.5,0.0>;
vector HA=<2.0,1.0,0.0>;
vector HB=<1.0,1.0,0.0>;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(HA.x<=0.0||HA.y<=0.0||HB.x<=0.0||HB.y<=0.0)
        {
            llOwnerSay("Positive half-extents required.");
            return;
        }
        vector d=B-A;
        float x=HA.x+HB.x-llFabs(d.x);
        float y=HA.y+HB.y-llFabs(d.y);
        if(x<=0.0||y<=0.0)
        {
            llOwnerSay("No overlap.");
            return;
        }
        vector shift=ZERO_VECTOR;
        if(x<y)
        {
            shift.x=-x;
            if(d.x<0.0)shift.x=x;
        }
        else
        {
            shift.y=-y;
            if(d.y<0.0)shift.y=y;
        }
        llOwnerSay("Move A by "+(string)shift+" to reach tangency.");
    }
}