From 997857b5968c51dbda0c0b00bc96c14986201460 Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Mon, 9 May 2022 18:13:34 +0800
Subject: [PATCH] return [0, 0, 0] when [0, 0, 0]

---
 src/util/spherical_coordinate.scad | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/util/spherical_coordinate.scad b/src/util/spherical_coordinate.scad
index 01408bb3..1da15bed 100644
--- a/src/util/spherical_coordinate.scad
+++ b/src/util/spherical_coordinate.scad
@@ -10,6 +10,7 @@
 
 function spherical_coordinate(point) = 
     // mathematics [r, theta, phi]
+    point == [0, 0, 0] ? [0, 0, 0] :
     let(r = norm(point))
     [
         r,