From ab45ff503257edf5848cbf81b28fb4b1c7f4ab25 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Tue, 25 Apr 2017 10:03:57 +0800
Subject: [PATCH] you can get the number of points now.

---
 src/circle_path.scad | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/circle_path.scad b/src/circle_path.scad
index 7e031b9b..6342e077 100644
--- a/src/circle_path.scad
+++ b/src/circle_path.scad
@@ -12,14 +12,15 @@
 *
 **/
 
-function circle_path(radius) =
+function circle_path(radius, n) =
     let(
         _frags = $fn > 0 ? 
             ($fn >= 3 ? $fn : 3) : 
             max(min(360 / $fa, radius * 6.28318 / $fs), 5),
-        step_a = 360 / _frags
+        step_a = 360 / _frags,
+        end_a = 360 - step_a * ((n == undef || n > _frags) ? 1 : _frags - n + 1)
     )
     [
-        for(a = [0 : step_a : 360 - step_a]) 
-            [radius * cos(a), radius * sin(a)]
+        for(a = [0 : step_a : end_a]) 
+            [radius * cos(a), radius * sin(a), 0]
     ];