tracker/steamvr: fix vive rotation order

Submitted-by: @subnet-
Issue: #353
cf.
https://github.com/opentrack/opentrack/issues/352#issuecomment-289306146

The submitter's working on the roll code. sin^1 codomain is +-90
deg. so we better use the equivalent atan2(3) formula.

1 files changed, 3 insertions, 4 deletions

diff --git a/tracker-steamvr/steamvr.hpp b/tracker-steamvr/steamvr.hpp
index 4a2bd117..5546d619 100644
--- a/tracker-steamvr/steamvr.hpp
+++ b/tracker-steamvr/steamvr.hpp
@@ -20,15 +20,14 @@ using namespace options;
 
 struct settings : opts
 {
-    value<int> order;
     settings() :
-        opts("valve-steamvr"),
-        order(b, "rotation-order", 0)
+        opts("valve-steamvr")
     {}
 };
 
-class steamvr : public ITracker
+class steamvr : public QObject, public ITracker
 {
+    Q_OBJECT
 public:
     steamvr();
     ~steamvr() override;