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- links_count=3;
-
- //validation=1;
- VALIDATE_INTERSECTION=1;
-
- use <BOSL/transforms.scad>
- use <BOSL/shapes.scad>
- include <BOSL/constants.scad>
-
- function get_link_segment_size() = [10, 20, 5];
- function get_link_pin_diameter() = 2;
-
- module link() {
- segment_size=get_link_segment_size();
- module pin() {
- h=segment_size.y;
- d=get_link_pin_diameter();
- back(h/2) xrot(90) cylinder(h=h, d=d, $fn=$preview ? 10 : 30);
- }
- module pin_socket_area() {
- h=segment_size.y-3;
- d=segment_size.z;
- back(h/2) xrot(90) cylinder(h=h, d=d, $fn=$preview ? 10 : 30);
- }
- module pin_socket() {
- difference() {
- pin_socket_area();
- scale(1.1) pin();
- }
- }
- module joiner() {
- gap=2;
- module arm() {
- arm_size=[segment_size.x*0.9, 2, segment_size.z];
- fwd(segment_size.y/2) right(segment_size.x/4) cuboid(arm_size, fillet=1, edges=EDGES_FRONT + EDGES_Y_ALL);
- }
- module armFront() {
- arm();
- }
- module armBack() {
- scale([1, -1, 1]) arm();
- }
- module armJoiner() {
- joiner_size=[4, segment_size.y, segment_size.z];
- right(segment_size.x/2) cuboid(joiner_size, fillet=1, edges=EDGES_Z_ALL + EDGES_BOTTOM);
- }
- module socketJoiner() {
- joiner_size=[segment_size.x-4,
- segment_size.y-4,
- segment_size.z];
- difference() {
- right(segment_size.x/2 + 2.5) cuboid(joiner_size, fillet=1, edges=EDGES_Z_ALL + EDGES_BOTTOM);
- right(segment_size.x) scale([1, 2, 1]) pin_socket_area();
- }
- }
- socketJoiner();
- armFront();
- armBack();
- armJoiner();
- }
-
- pin();
- right(segment_size.x) pin_socket();
- joiner();
- }
-
- segment_size=get_link_segment_size();
- if (!is_undef(validation)) {
- if (validation==VALIDATE_INTERSECTION) {
- intersection() {
- right(0*segment_size.x) link();
- right(1*segment_size.x) link();
- }
- intersection() {
- right(1*segment_size.x) link();
- right(2*segment_size.x) link();
- }
- }
- } else {
- for (i = [0:links_count-1]) {
- right(i*segment_size.x) link();
- }
- }
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