v1.4.4

source/game/StarInterpolationTracker.hpp

@@ -0,0 +1,42 @@
+#ifndef STAR_WORLD_INTERPOLATION_TRACKER_HPP
+#define STAR_WORLD_INTERPOLATION_TRACKER_HPP
+
+#include "StarJson.hpp"
+
+namespace Star {
+
+class InterpolationTracker {
+public:
+  InterpolationTracker(Json config = Json());
+
+  // Should interpolation be enabled on entities at all?  If this is false,
+  // extrapolationHint and interpolationLead will always return 0.
+  bool interpolationEnabled() const;
+  unsigned extrapolationHint() const;
+
+  // Steps in between entity updates
+  unsigned entityUpdateDelta() const;
+
+  void receiveStepUpdate(double remoteStep);
+  void update(double newLocalStep);
+
+  // Lead steps that incoming interpolated data as of this moment should be
+  // marked for.  If interpolation is disabled, this is always 0.0
+  float interpolationLeadSteps() const;
+
+private:
+  bool m_interpolationEnabled;
+  unsigned m_entityUpdateDelta;
+  unsigned m_stepLead;
+  unsigned m_extrapolationHint;
+  double m_stepTrackFactor;
+  double m_stepMaxDistance;
+
+  double m_currentStep;
+  Maybe<double> m_lastStepUpdate;
+  Maybe<double> m_predictedStep;
+};
+
+}
+
+#endif