From 307617de4328a90a5ada1cc7411168ac22a8387f Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@gmail.com>
Date: Mon, 24 Oct 2011 23:15:59 +0300
Subject: [PATCH] Fixes #366 - compass angle

---
 map/location_state.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/map/location_state.cpp b/map/location_state.cpp
index 72e888928e..2ded0ff9e7 100644
--- a/map/location_state.cpp
+++ b/map/location_state.cpp
@@ -29,7 +29,8 @@ namespace location
     m_flags |= ECompass;
 
     m_headingRad = ((info.m_trueHeading >= 0.0) ? info.m_trueHeading : info.m_magneticHeading)
-        / 180 * math::pi;
+        / 180 * math::pi
+        - math::pi / 2;  // 0 angle is for North ("up"), but in our coordinates it's to the right.
     m_headingAccuracyRad = info.m_accuracy / 180 * math::pi;
   }