Fixed linked strap parametrization

strap_link.scad

@@ -1,14 +1,24 @@
-links_count=3;
+links_count=15;
 
 //validation=1;
 VALIDATE_INTERSECTION=1;
 
+//xray=1;
+
 use <BOSL/transforms.scad>
 use <BOSL/shapes.scad>
 include <BOSL/constants.scad>
 
-function get_link_segment_size() = [10, 20, 5];
+function get_link_segment_size() = [15, 30, 5];
 function get_link_pin_diameter() = 2;
+function get_link_socket_slack() = [1, 4, 1];
+
+echo("===============================");
+echo(str("Strap length: ", (links_count * get_link_segment_size().x), " mm"));
+echo("===============================");
+
+assert(get_link_segment_size().x >= 10, "Link segment is too short.");
+assert(get_link_segment_size().z >= (get_link_pin_diameter() + get_link_socket_slack().z + 1), "Link segment is too thin.");
 
 module link() {
     segment_size=get_link_segment_size();
@@ -18,21 +28,26 @@ module link() {
         back(h/2) xrot(90) cylinder(h=h, d=d, $fn=$preview ? 10 : 30);
     }
     module pin_socket_area() {
-        h=segment_size.y-3;
+        h=segment_size.y-get_link_socket_slack().y;
         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();
+            scaleup = [
+                ((get_link_pin_diameter() + get_link_socket_slack().x) / get_link_pin_diameter()),
+                ((get_link_pin_diameter() + get_link_socket_slack().y) / get_link_pin_diameter()),
+                ((get_link_pin_diameter() + get_link_socket_slack().z) / get_link_pin_diameter())
+            ];
+            scale(scaleup) pin();
         }
     }
     module joiner() {
         gap=2;
+        arm_size=[8, 3, segment_size.z];
         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);
+            fwd(segment_size.y/2 + arm_size.y/2 - 1) right(arm_size.x/2 - 1) cuboid(arm_size, fillet=1, edges=EDGES_FRONT + EDGES_Y_ALL);
         }
         module armFront() {
             arm();
@@ -41,15 +56,15 @@ module link() {
             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);
+            joiner_size=[arm_size.x*0.48, segment_size.y, segment_size.z];
+            right(joiner_size.x + 1) 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(joiner_size.x/2 + 4.5) cuboid(joiner_size, fillet=1, edges=EDGES_Z_ALL + EDGES_BOTTOM);
                 right(segment_size.x) scale([1, 2, 1]) pin_socket_area();
             }
         }
@@ -76,6 +91,13 @@ if (!is_undef(validation)) {
             right(2*segment_size.x) link();
         }
     }
+} else if (!is_undef(xray)) {
+    intersection() {
+        cube([1000, 1000, 1000]);
+        for (i = [0:links_count-1]) {
+            right(i*segment_size.x) link();
+        }
+    }
 } else {
     for (i = [0:links_count-1]) {
         right(i*segment_size.x) link();