// joint for Croozer Cargo

infty = 100;
eps = 0.01;

side_space = 1.5;
wall = 2;
corner_d = 3;

inner_w = 16 + 0.6;
outer_w = 22.5 - 0.3;
body_h = 45;

hole_d = 7*1.1;
hole_off = 29;

module body() {
	hull() for (angle = [45:90:360]) rotate([0, 0, angle])
		translate([outer_w/sqrt(2)-corner_d*sqrt(2)/2, 0, 0])
			cylinder(r=corner_d/2, h = body_h, $fn = 8);
	hull() for (angle = [45:90:360]) rotate([0, 0, angle])
		translate([(outer_w+2*wall)/sqrt(2)-corner_d*sqrt(2)/2, 0, 0])
			cylinder(r=corner_d/2, h = side_space, $fn = 8);
}

difference() {
	body();
	translate([-inner_w/2, -inner_w/2, -eps])
		cube([inner_w, inner_w, body_h + 2*eps]);
	translate([0, infty/2, hole_off])
	rotate([90, 0, 0])
		cylinder(r = hole_d/2, h=infty, $fn = 6);
}