// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Project a point around a cylinder
// Not compiled or tested in-world
// Setup: Place in a spare owned prim. Set POINT, CENTER, HEIGHT and angular SEAM degrees. Touch for owner-only output.
// Stop / restore: Remove/disable. The script calculates only; no scene properties change.
// Notes: U wraps around the cylinder; V is measured from center upward. Points on the axis have no unique U.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Planning only.
vector POINT=<2.0,2.0,3.0>;
vector CENTER=ZERO_VECTOR;
float HEIGHT=4.0;
float SEAM=0.0;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        vector p=POINT-CENTER;
        if(HEIGHT<=0.0||p.x*p.x+p.y*p.y<0.000001)
        {
            llOwnerSay("Positive height and point off axis required.");
            return;
        }
        float u=(llAtan2(p.y,p.x)-SEAM*DEG_TO_RAD)/TWO_PI;
        u-=llFloor(u);
        llOwnerSay("Cylindrical UV="+(string)<u,p.z/HEIGHT,0.0>);
    }
}