From 90d2f1ac9cb781dd2065b878a5e99e32713bf5b9 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Thu, 13 Jun 2019 09:11:04 +0800
Subject: [PATCH] c-style for loop

---
 src/helix.scad | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/helix.scad b/src/helix.scad
index 84a148ee..1b140f23 100644
--- a/src/helix.scad
+++ b/src/helix.scad
@@ -25,10 +25,11 @@ function helix(radius, levels, level_dist, vt_dir = "SPI_DOWN", rt_dir = "CT_CLK
         r_step = r_diff / (levels * _frags),
         a_step = 360 / _frags * rt_d,
         begin_r = vt_dir == "SPI_DOWN" ? r2 : r1,
-        begin_h = vt_dir == "SPI_DOWN" ? h : 0
+        begin_h = vt_dir == "SPI_DOWN" ? h : 0,
+        end_i = _frags * levels
     )
     [
-        for(i = [0:_frags * levels]) 
+        for(i = 0; i <= end_i; i = i + 1) 
             let(r = begin_r + r_step * i, a = a_step * i)
                 [r * cos(a), r * sin(a), begin_h - h_step * i]
     ];
\ No newline at end of file