////////////////
/// Settings ///
////////////////

// The thickness of the walls
wall_thickness = 2;

// The dimensions of the box on the inside
box_inside = [
	110, // X
	130, // Y
	110 // Z
];

screw_diameter = 3;
screw_length = 6.3;


// -------------------------------------------

box_outside = [
	box_inside[0] + (wall_thickness * 2),
	box_inside[1] + (wall_thickness * 2),
	box_inside[2] + (wall_thickness - 0.1)
];

// -------------------------------------------

// Misc. Utility functions
// -------------------------------------------

module screw_port() {
	difference() {
		color("purple") cylinder(
			h = screw_length + wall_thickness,
			d = screw_diameter + (wall_thickness * 2),
			$fn = 25
		);
		
		color("mediumpurple") translate([0, 0, wall_thickness + 0.1]) cylinder(
			h = screw_length,
			d = screw_diameter,
			$fn = 25
		);
	};
}

// Box
// -------------------------------------------

difference() {
    color("green") cube(box_outside);
	
	translate([wall_thickness, wall_thickness, wall_thickness]) {
		cube(box_inside);
	}
};

// Screw holes
// -------------------------------------------

translate([0, 0, 200]) screw_port();

// Corners
// -------------------------------------------
corner_piece_size = screw_diameter + (wall_thickness * 2);
module corner_piece() {
	color("red") difference() {
		cube([
			corner_piece_size,
			corner_piece_size,
			box_inside[2]
		]);
		translate([
			corner_piece_size / 2,
			corner_piece_size / 2,
			box_inside[2] - screw_length + 0.1
		]) cylinder(h = screw_length, d = screw_diameter, $fn = 25);
	}
}

translate([
	wall_thickness,
	wall_thickness,
	wall_thickness
]) corner_piece();
translate([
	wall_thickness + box_inside[0] - corner_piece_size,
	wall_thickness,
	wall_thickness
]) corner_piece();
translate([
	wall_thickness,
	wall_thickness + box_inside[1] - corner_piece_size,
	wall_thickness
]) corner_piece();
translate([
	wall_thickness + box_inside[0] - corner_piece_size,
	wall_thickness + box_inside[1] - corner_piece_size,
	wall_thickness
]) corner_piece();