logic/tracker: try harder to keep up constant Hz

Now time error is accumulated rather than using only the last
iteration's error.

1 files changed, 2 insertions, 0 deletions

diff --git a/logic/tracker.h b/logic/tracker.h
index 5be55ccb..ce2279ab 100644
--- a/logic/tracker.h
+++ b/logic/tracker.h
@@ -116,6 +116,8 @@ private:
     state real_rotation, scaled_rotation;
     euler_t t_center;
 
+    long backlog_time;
+
     double map(double pos, Map& axis);
     void logic();
     void t_compensate(const rmat& rmat, const euler_t& ypr, euler_t& output,