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add dancing_cubes
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Justin Lin
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189
examples/dancing_cubes.scad
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189
examples/dancing_cubes.scad
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include <rounded_square.scad>;
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include <part/joint_T.scad>;
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include <shape_taiwan.scad>;
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rows = 3; // [2:100]
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cube_width = 20;
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spacing = 0.4;
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shaft_r = 1.9;
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edge_width = 2;
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pattern_thickness = 1.5;
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dancing_cubes_with(rows, cube_width, shaft_r, spacing, edge_width, pattern_thickness, center = true)
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linear_extrude(pattern_thickness)
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polygon(shape_taiwan(cube_width * rows - edge_width));
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module a_dancing_cube_no_joint(cube_width, holes, hole_radius, edge_width) {
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module part_for_carve_a_sink(hole_radius, height, edge_width) {
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module part_for_h_carving() {
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leng = hole_radius + edge_width + .1;
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rotate([0, 90, 0])
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linear_extrude(leng)
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circle(hole_radius);
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rotate([-90, 0, 0])
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linear_extrude(leng)
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circle(hole_radius);
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linear_extrude(2 * hole_radius, center = true)
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square(leng);
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}
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linear_extrude(height)
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circle(hole_radius);
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translate([0, 0, height / 4])
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part_for_h_carving();
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translate([0, 0, height * 3 / 4])
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part_for_h_carving();
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}
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corner_r = hole_radius + edge_width;
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module carved_parts() {
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offset_v = cube_width - corner_r;
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translate([corner_r, corner_r, 0])
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rotate(180)
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part_for_carve_a_sink(hole_radius, cube_width, edge_width);
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translate([offset_v, corner_r, 0])
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rotate(270)
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part_for_carve_a_sink(hole_radius, cube_width, edge_width);
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if(holes > 2) {
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translate([offset_v, offset_v, 0])
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rotate(360)
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part_for_carve_a_sink(hole_radius, cube_width, edge_width);
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} else if(holes > 3) {
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translate([corner_r, offset_v, 0])
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rotate(90)
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part_for_carve_a_sink(hole_radius, cube_width, edge_width);
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}
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}
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neg_half_w = -cube_width / 2;
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rotate(135)
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translate([neg_half_w, neg_half_w])
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difference() {
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linear_extrude(cube_width)
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rounded_square(cube_width, corner_r);
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carved_parts();
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}
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}
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module dancing_cubes(rows, cube_width, shaft_r, spacing, edge_width, center = false) {
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$fn = 36;
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half_cube_width = cube_width / 2;
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hole_radius = shaft_r + spacing;
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corner_r = hole_radius + edge_width;
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t_leng = edge_width + spacing + hole_radius;
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cube_offset = cube_width + spacing;
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function is_corner(row, column) =
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(row == 0 && (column == 0 || column == rows - 1)) ||
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(row == rows - 1 && (column == 0 || column == rows - 1));
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module corner_cube(row, column) {
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a = row == 0 && column == 0 ? 0 :
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row == 0 && column == rows - 1 ? -90 :
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row == rows - 1 && column == 0 ? 90 : 180;
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rotate(a)
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a_dancing_cube_no_joint(cube_width, 2, hole_radius, edge_width);
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}
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function is_side(row, column) =
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row * column == 0 ||
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row == rows - 1 ||
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column == rows - 1;
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module side_cube(row, column) {
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a = column == 0 ? 0 :
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row == 0 ? -90 :
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column == rows - 1 ? 180 : 90;
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rotate(a)
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a_dancing_cube_no_joint(cube_width, 3, hole_radius, edge_width);
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}
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function is_even(n) = n % 2 == 0;
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module joint_H() {
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module half_H() {
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translate([-t_leng, 0])
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joint_T(shaft_r, half_cube_width, t_leng, edge_width, spacing = spacing);
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translate([-t_leng, 0, half_cube_width])
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joint_T(shaft_r, half_cube_width, t_leng, edge_width, spacing = spacing);
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}
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half_H();
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mirror([1, 0, 0]) half_H();
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}
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center_offset = center ? (cube_width + spacing) * rows / 2 : 0;
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offset_v = half_cube_width + spacing - center_offset;
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translate([offset_v, offset_v]) {
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for(r = [0:rows - 1]) {
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for(c = [0:rows - 1]) {
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translate([cube_offset * r, cube_offset * c, 0])
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rotate(is_even(r + c) ? 45 : -45) {
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if(is_corner(r, c)) {
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corner_cube(r, c);
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} else if(is_side(r, c)) {
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side_cube(r, c);
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} else {
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a_dancing_cube_no_joint(cube_width, 4, hole_radius, edge_width);
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}
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}
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}
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}
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joint_offset_x = half_cube_width - corner_r;
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joint_offset_y = spacing + half_cube_width;
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for(r = [0:rows - 2]) {
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for(c = [0:rows - 1]) {
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offset_c = c * cube_offset;
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offset_r = joint_offset_y + cube_offset * r;
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translate([
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offset_c + (is_even(r + c) ? -joint_offset_x : joint_offset_x),
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offset_r
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])
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rotate(90)
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joint_H();
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translate([
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offset_r,
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offset_c + (is_even(r + c) ? joint_offset_x : -joint_offset_x)
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]) joint_H();
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}
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}
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}
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}
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module dancing_cubes_with(rows, cube_width, shaft_r, spacing, edge_width, pattern_thickness, center = false) {
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half_w = cube_width / 2;
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range_width = (cube_width + spacing) * rows;
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color("green") translate([0, 0, cube_width])
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intersection() {
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dancing_cubes(rows, cube_width, shaft_r, spacing, edge_width, center = center);
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intersection() {
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linear_extrude(pattern_thickness)
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square(range_width, center = center);
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children();
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}
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}
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dancing_cubes(rows, cube_width, shaft_r, spacing, edge_width, center = center);
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}
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