From c8548534c6d4dc3049128c87c6f2332d94c66e43 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Fri, 31 Mar 2017 09:54:38 +0200
Subject: tracker/steamvr: use atan2 rather than asin

Compute roll without a period of 90 deg.

Submitted-by: @subnet-
---
 tracker-steamvr/steamvr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tracker-steamvr/steamvr.cpp b/tracker-steamvr/steamvr.cpp
index 303efd06..e40d51a1 100644
--- a/tracker-steamvr/steamvr.cpp
+++ b/tracker-steamvr/steamvr.cpp
@@ -133,7 +133,7 @@ void steamvr::data(double* data)
             {
                 data[Yaw] = -atan2(-result.m[2][0], result.m[0][0]);
                 data[Pitch] = atan2(-result.m[1][2], result.m[1][1]);
-                data[Roll] = asin(result.m[1][0]);
+                data[Roll] = atan2(result.m[1][1], result.m[0][1]);
             }
 
             static constexpr double r2d = 180 / M_PI;
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