31 lines
1.1 KiB
C++
31 lines
1.1 KiB
C++
#include "stopwatch.hpp"
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#include <print>
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namespace basalt::presenter::stopwatch {
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Stopwatch::Stopwatch(size_t interval) : start_point(std::chrono::high_resolution_clock::now()), interval(interval), counter(0) {}
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Stopwatch::~Stopwatch() {}
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void Stopwatch::tick() {
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// 自增计时器
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++this->counter;
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if (this->counter >= this->interval) {
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// 计数器归零
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this->counter = 0;
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// 记下当前时刻，计算帧时间和FPS
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auto stop_point = std::chrono::high_resolution_clock::now();
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auto time_diff = std::chrono::duration_cast<std::chrono::milliseconds>(stop_point - this->start_point);
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auto frame_time = static_cast<double>(time_diff.count()) / this->interval;
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auto fps = 1000.0 / frame_time;
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// 输出给用户
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std::print("FPS: {:.2f} Frame Time: {:.4f} ms\n", fps, frame_time);
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// 把结束时间设置为开始时间继续下一轮循环
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this->start_point = stop_point;
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}
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}
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} // namespace basalt::presenter::stopwatch
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