// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Limit a heading change by turn speed
// Not compiled or tested in-world
// Setup: Put in a spare owned prim. Set headings, nonnegative TURN_SPEED and DT. Owner touch prints calculations only.
// Stop / restore: Disable/remove. No prim motion or appearance is changed.
// Notes: Uses degrees and a negative180-degree tie convention. This calculates yaw only, not full orientation.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Motion planning only.
float CURRENT=350.0;
float TARGET=40.0;
float TURN_SPEED=30.0;
float DT=0.2;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        if(TURN_SPEED<0.0||DT<0.0)
        {
            llOwnerSay("Invalid rate/time.");
            return;
        }
        float delta=TARGET-CURRENT+180.0;
        delta-=360.0*llFloor(delta/360.0);
        delta-=180.0;
        float limit=TURN_SPEED*DT;
        if(delta>limit)delta=limit;
        if(delta< -limit)delta=-limit;
        float result=CURRENT+delta;
        result-=360.0*llFloor(result/360.0);
        llOwnerSay("Next heading="+(string)result+" step="+(string)delta);
    }
}