fingerjoint box generator - initial commit
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mode = "project"; // default
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//mode = "parts";
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//mode = "assembly";
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thickness = 3.25; // 3.25mm = 1/8"
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spacing = 3.25;
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outer_width = 52*0.75;
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outer_height = 52*3*0.75;
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outer_depth = 52*1.333*0.75;
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golden_ratio = 1.61803398875;
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notch_size = golden_ratio*thickness;
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notches_w = round((outer_width - 6*thickness) / (2*notch_size));
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notches_h = round((outer_height - 6*thickness) / (2*notch_size));
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notches_d = round((outer_depth - 6*thickness) / (2*notch_size));
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module label(label_text) {
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if (mode != "project") text(label_text, halign="center", valign="center");
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}
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// 2D notch pattern for an edge from [-width/2,0] to [width/2,0] in the XY plane with a +Y normal.
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// Meant to be subtracted from the shape with difference().
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module notches_neg(n, width, depth=thickness) {
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// n notches + n-1 spaces
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notch_width = width / (2*n - 1);
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space_width = notch_width;
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for (i = [0 : n-1]) {
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translate([-width/2 + i*notch_width + i*space_width + notch_width/2, -depth/2, 0])
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square([notch_width, depth], center=true);
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}
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}
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// The inverse of notches_neg() for the same parameters, for the mating edge.
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module notches_pos(n, width, depth=thickness) {
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// n spaces + n-1 notches
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space_width = width / (2*n - 1);
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notch_width = space_width;
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translate([-1e6/2 - width/2, -depth/2, 0]) square([1e6, depth], center=true);
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for (i = [0 : n-1]) {
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translate([-width/2 + (i+1)*space_width + i*notch_width + notch_width/2, -depth/2, 0])
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square([notch_width, depth], center=true);
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}
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translate([10000/2 + width/2, -depth/2, 0]) square([10000, depth], center=true);
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}
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module top_side() {
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difference() {
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square([outer_width, outer_depth], center=true);
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translate([0,outer_depth/2+0.005,0]) rotate([0,0,0]) notches_neg(notches_w, outer_width - 6*thickness);
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translate([-outer_width/2-0.005,0,0]) rotate([0,0,90]) notches_neg(notches_d, outer_depth - 6*thickness);
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translate([0,-outer_depth/2-0.005,0]) rotate([0,0,180]) notches_neg(notches_w, outer_width - 6*thickness);
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translate([outer_width/2+0.005,0,0]) rotate([0,0,270]) notches_neg(notches_d, outer_depth - 6*thickness);
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label("Top");
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}
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}
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module bottom_side() {
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difference() {
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square([outer_width, outer_depth], center=true);
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translate([0,outer_depth/2+0.005,0]) rotate([0,0,0]) notches_neg(notches_w, outer_width - 6*thickness);
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translate([-outer_width/2-0.005,0,0]) rotate([0,0,90]) notches_neg(notches_d, outer_depth - 6*thickness);
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translate([0,-outer_depth/2-0.005,0]) rotate([0,0,180]) notches_neg(notches_w, outer_width - 6*thickness);
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translate([outer_width/2+0.005,0,0]) rotate([0,0,270]) notches_neg(notches_d, outer_depth - 6*thickness);
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label("Bottom");
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}
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}
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module left_side() {
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difference() {
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square([outer_height, outer_depth], center=true);
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translate([0,outer_depth/2+0.005,0]) rotate([0,0,0]) notches_neg(notches_h, outer_height - 6*thickness);
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translate([-outer_height/2-0.005,0,0]) rotate([0,0,90]) notches_pos(notches_d, outer_depth - 6*thickness);
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translate([0,-outer_depth/2-0.005,0]) rotate([0,0,180]) notches_neg(notches_h, outer_height - 6*thickness);
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translate([outer_height/2+0.005,0,0]) rotate([0,0,270]) notches_pos(notches_d, outer_depth - 6*thickness);
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label("Left");
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}
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}
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module right_side() {
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difference() {
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square([outer_height, outer_depth], center=true);
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translate([0,outer_depth/2+0.005,0]) rotate([0,0,0]) notches_neg(notches_h, outer_height - 6*thickness);
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translate([-outer_height/2-0.005,0,0]) rotate([0,0,90]) notches_pos(notches_d, outer_depth - 6*thickness);
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translate([0,-outer_depth/2-0.005,0]) rotate([0,0,180]) notches_neg(notches_h, outer_height - 6*thickness);
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translate([outer_height/2+0.005,0,0]) rotate([0,0,270]) notches_pos(notches_d, outer_depth - 6*thickness);
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label("Right");
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}
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}
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module front_side() {
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difference() {
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square([outer_width, outer_height], center=true);
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translate([0,outer_height/2+0.005,0]) rotate([0,0,0]) notches_pos(notches_w, outer_width - 6*thickness);
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translate([-outer_width/2-0.005,0,0]) rotate([0,0,90]) notches_pos(notches_h, outer_height - 6*thickness);
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translate([0,-outer_height/2-0.005,0]) rotate([0,0,180]) notches_pos(notches_w, outer_width - 6*thickness);
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translate([outer_width/2+0.005,0,0]) rotate([0,0,270]) notches_pos(notches_h, outer_height - 6*thickness);
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label("Front");
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}
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}
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module back_side() {
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difference() {
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square([outer_width, outer_height], center=true);
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translate([0,outer_height/2+0.005,0]) rotate([0,0,0]) notches_pos(notches_w, outer_width - 6*thickness);
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translate([-outer_width/2-0.005,0,0]) rotate([0,0,90]) notches_pos(notches_h, outer_height - 6*thickness);
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translate([0,-outer_height/2-0.005,0]) rotate([0,0,180]) notches_pos(notches_w, outer_width - 6*thickness);
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translate([outer_width/2+0.005,0,0]) rotate([0,0,270]) notches_pos(notches_h, outer_height - 6*thickness);
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label("Back");
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}
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}
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module thicken() {
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linear_extrude(height=thickness, center=true, convexity=10) children();
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}
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module std_part_layout() {
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translate([0,0,0]) top_side();
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translate([-(outer_width/2 + outer_height/2 + spacing), 0, 0]) left_side();
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translate([ (outer_width/2 + outer_height/2 + spacing), 0, 0]) right_side();
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translate([0, -(outer_depth/2 + outer_height/2 + spacing), 0]) front_side();
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translate([0, (outer_depth/2 + outer_height/2 + spacing), 0]) back_side();
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translate([0, -(outer_depth + outer_height + 2*spacing), 0]) bottom_side();
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}
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module part_layout() {
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translate([-2*(outer_depth/2 + outer_width/2 + spacing), 0, 0]) back_side();
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translate([-1*(outer_depth/2 + outer_width/2 + spacing), 0, 0]) rotate([0,0,90]) left_side();
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front_side();
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translate([outer_depth/2 + outer_width/2 + spacing, 0, 0]) rotate([0,0,90]) right_side();
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translate([outer_depth + outer_width + 2*spacing,(outer_height-outer_depth)/2,0]) top_side();
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translate([outer_depth + outer_width + 2*spacing,-(outer_height-outer_depth)/2,0]) bottom_side();
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}
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module part_assembly() {
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color("red") translate([0,0, outer_height/2 - thickness/2]) rotate([0,0,0]) thicken() top_side();
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color("green") translate([0,0,-outer_height/2 + thickness/2]) rotate([180,0,0]) thicken() bottom_side();
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color("blue") translate([-outer_width/2 + thickness/2,0,0]) rotate([0,-90,0]) thicken() left_side();
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color("cyan") translate([ outer_width/2 - thickness/2,0,0]) rotate([0, 90,0]) thicken() right_side();
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color("magenta") translate([0,-outer_depth/2 + thickness/2,0]) rotate([ 90,0,0]) thicken() front_side();
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color("yellow") translate([0, outer_depth/2 - thickness/2,0]) rotate([-90,0,0]) thicken() back_side();
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}
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if (mode == "project")
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part_layout();
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else if (mode == "parts")
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thicken() part_layout();
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else
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part_assembly();
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