From 34a9e38e12ff031da1c6b440b24bba6283dd3e29 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Sat, 15 Feb 2020 18:05:54 +0800
Subject: [PATCH] add default value

---
 src/experimental/tf_ring.scad | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/experimental/tf_ring.scad b/src/experimental/tf_ring.scad
index a6b9950a..9e45f20f 100644
--- a/src/experimental/tf_ring.scad
+++ b/src/experimental/tf_ring.scad
@@ -8,7 +8,7 @@ use <experimental/tf_y_twist.scad>;
     angle: arc angle.
     twist: The number of degrees of through which the rectangle is twisted.
 */
-function tf_ring(size, point, radius, angle, twist = 0) = 
+function tf_ring(size, point, radius, angle = 360, twist = 0) = 
     let(
         yleng = size[1],
         a_step = angle / yleng,