include <BOSL2/std.scad>

pas_w = 50;
pas_l = 5;
dlugosc = 25;
t = 5;
r = 1.5;

$slop = 1;
$fa = 6;
$fs = 0.2;

path = [
    [ pas_w/2 + $slop, 0],
    [ pas_w/2 + $slop, -pas_l],
    [ 0, -dlugosc],
    [-pas_w/2 - $slop, -pas_l],
    [-pas_w/2 - $slop, 0],
];

path_sweep2d(
    rect(t, rounding=r), // Cross-section profile
    path,        // Rounded path trajectory
    style="alt",
    closed = true
);