eps = 0.01;
infty = 1000;

lateral_angle = 18;
dihedral = 10;

wall = 1.0;

fuse_w = 36;
body_l = 40;

foam_w = 3;

module plate(w, h, la, d) {
	intersection() {
		translate([-eps, -infty/2, -eps])
			cube([w, infty, h]);
		rotate([la, 0, 0])
		rotate([0, 0, d])
		translate([-infty/2, 0, -infty/2])
			cube([infty, wall, infty]);
	}
}

for (z = [-1, 1]) for (x = [-1, 1]) scale([x, 1, z])
	plate(fuse_w/2, body_l/2, lateral_angle/2, dihedral/2);

// lateral beam
hull() {
	for (z = [-1, 1]) scale ([1, 1, z]) {
		rotate([lateral_angle/2, 0, 0])
			translate([-wall/2, 0, 0])
				cube([wall, wall/2, foam_w/sin(lateral_angle/2)]);

	}
}

// cross beam
hull() {
	for (x = [-1, 1]) scale ([x, 1, 1]) {
		rotate([0, 0, dihedral/2])
			translate([0, wall/2, -wall/2])
				cube([fuse_w/2, wall/2, wall]);

	}
}