// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Track a rotary drag across the angle seam
// Not compiled or tested in-world
// Setup: Use a spare ordinary cube owned by you. Press away from center, drag around it, then release. Surface mapping can differ on meshes; test one face first.
// Stop / restore: Disable/remove; these controllers report privately and do not alter scene properties. Reset clears gesture/session state.
// Notes: Crossings use shortest per-sample angular differences; extremely fast motion beyond180 degrees per event is ambiguous.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Owner input only.
integer active;
float lastAngle;
float accumulated;
float nextReport;
sample()
{
    vector uv=llDetectedTouchST(0);
    if(!usable(uv))return;
    vector p=uv-<0.5,0.5,0.0>;
    if(llVecMag(p)<0.08)return;
    float angle=llAtan2(p.y,p.x);
    if(!active)
    {
        lastAngle=angle;
        active=TRUE;
        return;
    }
    float delta=angle-lastAngle;
    while(delta>PI)delta-=TWO_PI;
    while(delta< -PI)delta+=TWO_PI;
    accumulated+=delta;
    lastAngle=angle;
}
integer ownerTouch()
{
    return llDetectedKey(0)==llGetOwner();
}
integer usable(vector uv)
{
    return llDetectedTouchFace(0)>=0&&uv!=TOUCH_INVALID_TEXCOORD;
}
default
{
    touch_start(integer n)
    {
        if(!ownerTouch())return;
        active=FALSE;
        accumulated=0.0;
        sample();
        nextReport=llGetTime()+0.25;
    }
    touch(integer n)
    {
        if(!ownerTouch())return;
        sample();
        if(llGetTime()>=nextReport)
        {
            nextReport=llGetTime()+0.25;
            llOwnerSay("Accumulated degrees="+(string)(accumulated*RAD_TO_DEG));
        }
    }
    touch_end(integer n)
    {
        if(!ownerTouch())return;
        sample();
        llOwnerSay("Final degrees="+(string)(accumulated*RAD_TO_DEG));
        active=FALSE;
    }
    changed(integer flags)
    {
        if(flags&CHANGED_OWNER)llResetScript();
    }
}