X-Git-Url: http://git.tdb.fi/?p=libs%2Fvr.git;a=blobdiff_plain;f=source%2Fsystem.h;h=69b93a15d3220a02abcaf38d52440ffcea7eaaab;hp=f7e28b587ec7f1cfd869864b136e059ee658d9c2;hb=7ad8d41683649816d3d162f614dc8bb585053311;hpb=e21e0b80154afe4a62480efca61a07d4c2f2b0ef

diff --git a/source/system.h b/source/system.h
index f7e28b5..69b93a1 100644
--- a/source/system.h
+++ b/source/system.h
@@ -24,7 +24,9 @@ public:
 
 	virtual void configure_window(Graphics::Window &) const = 0;
 	virtual void configure_view(StereoView &) const = 0;
-	virtual void set_absolute_tracking(bool) = 0;
+	virtual bool is_absolute_tracking_supported() const { return false; }
+	virtual void set_absolute_tracking(bool);
+	virtual bool get_absolute_tracking() const { return false; }
 	virtual HeadTrackingCamera *create_camera(const GL::Camera &) = 0;
 	virtual StereoCombiner *create_combiner(GL::View &) = 0;
 };