From 3cd0d138aff5e51fb75333b8a40062391d1ad346 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Wed, 19 Feb 2020 12:19:31 +0800
Subject: [PATCH] support 3D point

---
 src/experimental/tf_bend.scad | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/experimental/tf_bend.scad b/src/experimental/tf_bend.scad
index 3c7f45de..f5544259 100644
--- a/src/experimental/tf_bend.scad
+++ b/src/experimental/tf_bend.scad
@@ -12,7 +12,9 @@ function tf_bend(size, point, radius, angle) =
         // ylen = size[1],
         y = point[0],
         z = point[1],
+        x = is_undef(point[2]) ? 0 : point[2],
         a_step = angle / xlen,
-        a = a_step * y
+        a = a_step * y,
+        r = radius + x
     )
-    [radius * cos(a), radius * sin(a), z];
\ No newline at end of file
+    [r * cos(a), r * sin(a), z];
\ No newline at end of file