add spherical_coordinate

src/experimental/note.md

@@ -10,4 +10,5 @@ dotSCAD 3.0 Dev
 
 New modules/functions
 
-- `some`
+- `spherical_coordinate`
+- `util/some`

src/spherical_coordinate.scad

@@ -0,0 +1,6 @@
+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]];