/**
* shape_circle.scad
*
* @copyright Justin Lin, 2020
* @license https://opensource.org/licenses/lgpl-3.0.html
*
* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-shape_circle.html
*
**/

use <__frags.scad>

function shape_circle(radius, n) =
    let(
        _frags = __frags(radius),
        step_a = 360 / _frags,
        to = (is_undef(n) || n > _frags) ? _frags - 1: n - 1
    )
    [
        for(a = [each [0:to]] * step_a)
        [radius * cos(a), radius * sin(a)]
    ];