RefreshSchedule.h

#pragma once
 
#include <cstdint>
 
namespace util
{
 
enum class Refresh
{
   Auto,       
   Once,       
   OnChange,   
   Period,     
   EveryFrame, 
};
 
Refresh ResolveRefresh(Refresh requested, bool timeInvariant, bool changesWithWakesOnly);
 
class RefreshSchedule
{
public:
   RefreshSchedule(Refresh mode, double period);
 
   [[nodiscard]] bool Due(double T, std::uint64_t revision, bool unchanged, bool moved) const;
 
   void Sampled(double T, std::uint64_t revision);
 
   [[nodiscard]] Refresh Mode() const { return m_mode; }
 
   [[nodiscard]] double LastSampleTime() const { return m_lastTime; }
 
private:
   [[nodiscard]] bool PeriodPassed(double T) const;
 
   Refresh       m_mode;                 
   double        m_period;               
   bool          m_sampled      = false; 
   double        m_lastTime     = 0.0;   
   std::uint64_t m_lastRevision = 0;     
};
 
} // namespace util