From 812e483c2b15b4e521797af1310fc9d4dccee882 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 5 Apr 2017 11:36:55 +0200
Subject: tracker/steamvr: revert to asin formula

---
 tracker-steamvr/steamvr.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tracker-steamvr/steamvr.cpp b/tracker-steamvr/steamvr.cpp
index 7b75952e..901c4241 100644
--- a/tracker-steamvr/steamvr.cpp
+++ b/tracker-steamvr/steamvr.cpp
@@ -247,9 +247,12 @@ bool steamvr::center()
 
 void steamvr::matrix_to_euler(double& yaw, double& pitch, double& roll, const vr::HmdMatrix34_t& result)
 {
+    using std::atan2;
+    using std::asin;
+
     yaw = atan2(result.m[2][0], result.m[0][0]);
     pitch = atan2(result.m[1][1], result.m[1][2]);
-    roll = atan2(result.m[1][1], result.m[0][1]);
+    roll = asin(result.m[1][0]);
 }
 
 steamvr_dialog::steamvr_dialog()
-- 
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