// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Estimate stopping distance with reaction delay
// Not compiled or tested in-world
// Setup: Place in a spare owned prim. Set nonnegative SPEED and REACTION_TIME and positive DECELERATION. Touch for owner-only output.
// Stop / restore: Remove/disable. The script calculates only; no scene properties change.
// Notes: Ideal kinematics for a virtual controller. It does not predict simulator physics or guarantee a collision-free stop.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Planning only.
float SPEED=5.0;
float REACTION_TIME=0.2;
float DECELERATION=2.0;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(SPEED<0.0||REACTION_TIME<0.0||DECELERATION<=0.0)
        {
            llOwnerSay("Invalid inputs.");
            return;
        }
        float reaction=SPEED*REACTION_TIME;
        float braking=SPEED*SPEED/(2.0*DECELERATION);
        llOwnerSay("Reaction travel="+(string)reaction+" braking="+(string)braking+" total="+(string)(reaction+braking));
    }
}