From 9359c388d108d3f8d67384405be7f724e4e0a8d4 Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Mon, 27 Jul 2020 18:38:34 +1000
Subject: [PATCH] Add true north conversion function to IfcOpenShell
 geolocation util lib

---
 src/ifcopenshell-python/ifcopenshell/util/geolocation.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ifcopenshell-python/ifcopenshell/util/geolocation.py b/src/ifcopenshell-python/ifcopenshell/util/geolocation.py
index b37402b98f..115bd659ef 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/geolocation.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/geolocation.py
@@ -24,3 +24,7 @@ def xyz2enh(x, y, z, eastings, northings, orthogonal_height, x_axis_abscissa, x_
     northings = (b * x) + (a * y) + northings
     height = z + orthogonal_height
     return (eastings, northings, height)
+
+# Used for converting the X and Y vectors of the X Axis in IFC geolocation
+def xy2angle(x, y):
+    return math.degrees(math.atan2(y, x)) - 90