From f511c281a54be1d80ebc9acc9b30405e0b94cc9b Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Wed, 24 May 2017 10:04:15 +0800
Subject: [PATCH] refactored

---
 src/__private__/__polytransversals.scad | 20 ++++++++++++++++++++
 src/polytransversals.scad               | 23 ++---------------------
 2 files changed, 22 insertions(+), 21 deletions(-)
 create mode 100644 src/__private__/__polytransversals.scad

diff --git a/src/__private__/__polytransversals.scad b/src/__private__/__polytransversals.scad
new file mode 100644
index 00000000..6fcb8647
--- /dev/null
+++ b/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
+    );
\ No newline at end of file
diff --git a/src/polytransversals.scad b/src/polytransversals.scad
index 0642c10f..f715aeb5 100644
--- a/src/polytransversals.scad
+++ b/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(
-            transversals[0], 
-            rights, 
-            __reverse(transversals[leng_trs - 1]), 
-            lefts
-        )
+        __polytransversals(transversals)
     );
 }
\ No newline at end of file