// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Identify sharp turns in a planned route
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set POINTS with3..12 vertices. Owner touch prints sample coordinates.
// Stop / restore: Remove/disable. Nothing is rezzed or moved.
// Notes: Repeated points are skipped with a warning. Angles do not imply whether a physical object can traverse the turn.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Planning only.
list POINTS=[<0.0,0.0,0.0>,<4.0,0.0,0.0>,<5.0,3.0,0.0>,<2.0,5.0,0.0>];
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        integer n=llGetListLength(POINTS);
        if(n<3||n>12)
        {
            llOwnerSay("Use3..12 points.");
            return;
        }
        integer i;
        for(i=1;i<n-1;++i)
        {
            vector incoming=llList2Vector(POINTS,i)-llList2Vector(POINTS,i-1);
            vector outgoing=llList2Vector(POINTS,i+1)-llList2Vector(POINTS,i);
            incoming.z=0.0;
            outgoing.z=0.0;
            if(llVecMag(incoming)<0.000001||llVecMag(outgoing)<0.000001)llOwnerSay("Repeated XY point near index "+(string)i);
            else llOwnerSay("Turn "+(string)i+" degrees="+(string)(llAtan2(incoming.x*outgoing.y-incoming.y*outgoing.x,incoming*outgoing)*RAD_TO_DEG));
        }
    }
}