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FPSLimiter.h
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FPSLimiter.h
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#pragma once
#include <chrono>
#include <thread>
template <typename C = std::chrono::high_resolution_clock>
class FPSLimiter {
public:
FPSLimiter(int64_t frameTime = 16666666) :
m_frameTime { frameTime },
m_startTime { C::now().time_since_epoch().count() },
m_sleepTime { 0 },
m_frameTimeDebt{ 0 } {
}
void run() {
m_sleepTime = (m_frameTime - m_frameTimeDebt) - (C::now().time_since_epoch().count() - m_startTime);
if (m_sleepTime > 0) {
std::this_thread::sleep_for(std::chrono::nanoseconds(m_sleepTime));
}
m_frameTimeDebt = (C::now().time_since_epoch().count() - m_startTime) - (m_frameTime - m_frameTimeDebt);
m_startTime = C::now().time_since_epoch().count();
}
private:
int64_t m_frameTime;
int64_t m_startTime;
int64_t m_sleepTime;
int64_t m_frameTimeDebt;
};