From 149b3b5dbc8b18a142bf35869e54ab05e8f26d54 Mon Sep 17 00:00:00 2001 From: WBoerenkamps Date: Mon, 11 Nov 2024 20:21:31 +0100 Subject: added chrono::duration --- src/crepe/api/LoopTimer.h | 105 +++++++++++++++++++++++----------------------- 1 file changed, 53 insertions(+), 52 deletions(-) (limited to 'src/crepe/api/LoopTimer.h') diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h index 5309d2f..ec48e4a 100644 --- a/src/crepe/api/LoopTimer.h +++ b/src/crepe/api/LoopTimer.h @@ -1,144 +1,145 @@ -#pragma once + #pragma once #include +#include namespace crepe { class LoopTimer { public: - /** + /** * \brief Get the singleton instance of LoopTimer. * * \return A reference to the LoopTimer instance. */ - static LoopTimer & get_instance(); + static LoopTimer& get_instance(); - /** + /** * \brief Get the current delta time for the current frame. * - * \return Delta time in milliseconds since the last frame. + * \return Delta time in seconds since the last frame. */ - double get_delta_time() const; + double get_delta_time() const; - /** + /** * \brief Get the current game time. * * \note The current game time may vary from real-world elapsed time. * It is the cumulative sum of each frame's delta time. * - * \return Elapsed game time in milliseconds. + * \return Elapsed game time in seconds. */ - double get_current_time() const; + double get_current_time() const; - /** + /** * \brief Set the target frames per second (FPS). * * \param fps The desired frames rendered per second. */ - void set_fps(int fps); + void set_fps(int fps); - /** + /** * \brief Get the current frames per second (FPS). * * \return Current FPS. */ - int get_fps() const; + int get_fps() const; - /** + /** * \brief Get the current game scale. * * \return The current game scale, where 0 = paused, 1 = normal speed, and values > 1 speed up the game. */ - double get_game_scale() const; + double get_game_scale() const; - /** + /** * \brief Set the game scale. * * \param game_scale The desired game scale (0 = pause, 1 = normal speed, > 1 = speed up). */ - void set_game_scale(double game_scale); + void set_game_scale(double game_scale); private: - friend class LoopManager; + friend class LoopManager; - /** + /** * \brief Start the loop timer. * * Initializes the timer to begin tracking frame times. */ - void start(); + void start(); - /** + /** * \brief Enforce the frame rate limit. * * Ensures that the game loop does not exceed the target FPS by delaying * frame updates as necessary. */ - void enforce_frame_rate(); + void enforce_frame_rate(); - /** + /** * \brief Get the fixed delta time for consistent updates. * * Fixed delta time is used for operations that require uniform time steps, * such as physics calculations. * - * \return Fixed delta time in milliseconds. + * \return Fixed delta time in seconds. */ - double get_fixed_delta_time() const; + double get_fixed_delta_time() const; - /** + /** * \brief Get the accumulated lag in the game loop. * * Lag represents the difference between the target frame time and the * actual frame time, useful for managing fixed update intervals. * - * \return Accumulated lag in milliseconds. + * \return Accumulated lag in seconds. */ - double get_lag() const; + double get_lag() const; - /** + /** * \brief Construct a new LoopTimer object. * * Private constructor for singleton pattern to restrict instantiation * outside the class. */ - LoopTimer(); + LoopTimer(); - /** + /** * \brief Update the timer to the current frame. * * Calculates and updates the delta time for the current frame and adds it to * the cumulative game time. */ - void update(); + void update(); - /** + /** * \brief Advance the game loop by a fixed update interval. * * This method progresses the game state by a consistent, fixed time step, * allowing for stable updates independent of frame rate fluctuations. */ - void advance_fixed_update(); + void advance_fixed_update(); private: - //! Current frames per second - int fps = 50; - //! Current game scale - double game_scale = 1; - //! Maximum delta time in milliseconds to avoid large jumps - double maximum_delta_time = 250; - //! Delta time for the current frame in milliseconds - double delta_time = 0; - //! Target time per frame in milliseconds - double frame_target_time = 1000.0 / fps; - //! Fixed delta time for fixed updates in milliseconds - double fixed_delta_time = 20; - //! Total elapsed game time in milliseconds - double elapsed_time = 0; - //! Total elapsed time for fixed updates in milliseconds - double elapsed_fixed_time = 0; - //! Time of the last frame in milliseconds - uint64_t last_frame_time = 0; + //! Current frames per second + int fps = 50; + //! Current game scale + double game_scale = 1; + //! Maximum delta time in seconds to avoid large jumps + std::chrono::duration maximum_delta_time{0.25}; + //! Delta time for the current frame in seconds + std::chrono::duration delta_time{0.0}; + //! Target time per frame in seconds + std::chrono::duration frame_target_time = std::chrono::seconds(1) / fps; + //! Fixed delta time for fixed updates in seconds + std::chrono::duration fixed_delta_time = std::chrono::seconds(1) / 50; + //! Total elapsed game time in seconds + std::chrono::duration elapsed_time{0.0}; + //! Total elapsed time for fixed updates in seconds + std::chrono::duration elapsed_fixed_time{0.0}; + //! Time of the last frame + std::chrono::steady_clock::time_point last_frame_time; }; } // namespace crepe -- cgit v1.2.3