From e1e5ca3cdb96a5c53bcd88edef833a7525c5f591 Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Tue, 9 Feb 2021 14:30:44 +0800
Subject: [PATCH] refactor

---
 src/spherical_coordinate.scad | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/spherical_coordinate.scad b/src/spherical_coordinate.scad
index 295315d5..47608097 100644
--- a/src/spherical_coordinate.scad
+++ b/src/spherical_coordinate.scad
@@ -1,6 +1,7 @@
-use <__comm__/__angy_angz.scad>;
-
 function spherical_coordinate(point) = 
-    let(ayz = __angy_angz([0, 0, 0], point))
-    // mathematics, r, theta, phi 
-    [norm(point), ayz[1], ayz[0]];
\ No newline at end of file
+    // mathematics [r, theta, phi]
+    [
+        norm(point), 
+        atan2(point[1], point[0]), 
+        atan2(point[2], sqrt(point[0]^2 + point[1]^2))
+    ];