impl centering not confused on 90deg boundaries

atan2 returned wrong quadrants, as per
<http://en.wikipedia.org/wiki/Atan2#Definition_and_computation> breakage
on sign change.

Issue: #63

1 files changed, 1 insertions, 2 deletions

diff --git a/opentrack/tracker.h b/opentrack/tracker.h
index feb1f903..23939576 100644
--- a/opentrack/tracker.h
+++ b/opentrack/tracker.h
@@ -7,7 +7,6 @@
 #include "plugin-support.h"
 #include "mappings.hpp"
 #include "pose.hpp"
-#include "quat.hpp"
 #include "simple-mat.hpp"
 
 #include "../qfunctionconfigurator/functionconfig.h"
@@ -33,7 +32,7 @@ private:
     std::atomic<bool> should_quit;
     SelectedLibraries const& libs;
 
-    Quat q_b;
+    dmat<3, 3> r_b;
     double t_b[3];
 
     double map(double pos, bool invertp, Mapping& axis);