$fn=50;

HIEGHT = 1;

module square_rounded(size1, size2, r1, r2, h) {
	union() {
		difference() {
			translate([0, 0, h/2]) {
				cube([size1-r1*2, size2, h], center=true);
				cube([size2, size1-r1*2, h], center=true);
			}
			for(r=[0, 90, 180, -90])
			rotate([0, 0, r])
			translate([-size2/2, size1/2, 0])
			rotate([-45, 0, 0])
				cube([size2, 100, 2*h]);
		}
		for(r=[0, 90, 180, -90])
		rotate([0, 0, r])
		translate([size1/2-r1, size1/2-r1]) 
			cylinder(h=h, r1=r1, r2=r2);
	}
}

module gf_bottom() {
	union() {
		square_rounded(size1=35.6, size2=37.2, r1=0.8, r2=1.6, h=0.8);
		translate([0, 0, 0.8])
			square_rounded(size1=37.2, size2=37.2, r1=1.6, r2=1.6, h=1.8);
		translate([0, 0, 2.6])
			square_rounded(size1=37.2, size2=41.5, r1=1.6, r2=3.75, h=2.15);
	}
}

module gf_socker_cut() {
	t = 0.25;
	a = sin(45)*t;
	b = a*tan(22.5);
	c = t/sin(45);
	echo(a+b);
	translate([0, 0, -a])
	union() {
		square_rounded(size1=35.6+a*2, size2=37.2+2*t, r1=0.8+a, r2=1.6+t, h=0.8+b);
		translate([0, 0, 0.8+b])
			square_rounded(size1=37.2+2*t, size2=37.2+2*t, r1=1.6+t, r2=1.6+t, h=1.8);
		translate([0, 0, 2.6+b])
			square_rounded(size1=37.2+2*t, size2=41.5+2*c, r1=1.6+t, r2=3.75+c, h=2.15+a-b-0.001);
	}
}

// gf_bottom();
// gf_socker_cut();

difference() {
	union() {
		gf_bottom();
		translate([0, 0, 4.75])
			square_rounded(size1=41.5, size2=41.5, r1=3.75, r2=3.75, h=HIEGHT*7+4.4-4.75);
	}
	translate([0, 0, HIEGHT*7+4.4])
		gf_socker_cut();
}