refactored

src/__private__/__polytransversals.scad

@@ -0,0 +1,20 @@
+function __polytransversals(transversals) =
+    let(
+        leng_trs = len(transversals),
+        leng_tr = len(transversals[0]),
+        lefts = [
+            for(i = [1:leng_trs - 2]) 
+                let(tr = transversals[leng_trs - i])
+                    tr[0]
+        ],
+        rights = [
+            for(i = [1:leng_trs - 2]) 
+                let(tr = transversals[i])
+                    tr[leng_tr - 1]
+        ]
+    ) concat(
+        transversals[0], 
+        rights, 
+        __reverse(transversals[leng_trs - 1]), 
+        lefts
+    );

src/polytransversals.scad

@@ -12,29 +12,10 @@
 **/
 
 include <__private__/__reverse.scad>;
+include <__private__/__polytransversals.scad>;
 
 module polytransversals(transversals) {
-    leng_trs = len(transversals);
-    leng_tr = len(transversals[0]);
-
-    lefts = [
-        for(i = [1:leng_trs - 2]) 
-            let(tr = transversals[leng_trs - i])
-                tr[0]
-    ];
-
-    rights = [
-        for(i = [1:leng_trs - 2]) 
-            let(tr = transversals[i])
-                tr[leng_tr - 1]
-    ];
-
     polygon(
-        concat(
+        __polytransversals(transversals)
-            transversals[0], 
-            rights, 
-            __reverse(transversals[leng_trs - 1]), 
-            lefts
-        )
     );
 }