From 2681fbce0bc88d1b819de67d658e8a5276cca0d0 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Sat, 17 Jun 2017 18:08:06 +0800
Subject: [PATCH] to the  length of children

---
 src/along_with.scad | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/along_with.scad b/src/along_with.scad
index e2024eba..a8fd9e34 100644
--- a/src/along_with.scad
+++ b/src/along_with.scad
@@ -30,9 +30,11 @@ module along_with(points, angles, twist = 0, scale = 1.0) {
             (scale[1] - 1) / leng_points_minus_one,
             scale[2] == undef ? 0 : (scale[2] - 1) / leng_points_minus_one
         ] : scale_step(); 
+    
+    end_i = $children == 1 ? leng_points_minus_one : $children - 1;
 
     function _path_angles(pts, i = 0) = 
-        i == leng_points_minus_one ?
+        i == end_i ?
                 [] : 
                 concat(
                     [__angy_angz(pts[i], pts[i + 1])],