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-rw-r--r--src/crepe/api/LoopTimer.h144
1 files changed, 0 insertions, 144 deletions
diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h
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index 9393439..0000000
--- a/src/crepe/api/LoopTimer.h
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-#pragma once
-
-#include <chrono>
-
-namespace crepe {
-
-class LoopTimer {
-public:
- /**
- * \brief Get the singleton instance of LoopTimer.
- *
- * \return A reference to the LoopTimer instance.
- */
- static LoopTimer & get_instance();
-
- /**
- * \brief Get the current delta time for the current frame.
- *
- * \return Delta time in seconds since the last frame.
- */
- 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 seconds.
- */
- 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);
-
- /**
- * \brief Get the current frames per second (FPS).
- *
- * \return Current FPS.
- */
- 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;
-
- /**
- * \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);
-
-private:
- friend class LoopManager;
-
- /**
- * \brief Start the loop timer.
- *
- * Initializes the timer to begin tracking frame times.
- */
- 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();
-
- /**
- * \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 seconds.
- */
- 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 seconds.
- */
- double get_lag() const;
-
- /**
- * \brief Construct a new LoopTimer object.
- *
- * Private constructor for singleton pattern to restrict instantiation outside the class.
- */
- 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();
-
- /**
- * \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();
-
-private:
- //! 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<double> maximum_delta_time{0.25};
- //! Delta time for the current frame in seconds
- std::chrono::duration<double> delta_time{0.0};
- //! Target time per frame in seconds
- std::chrono::duration<double> frame_target_time = std::chrono::duration<double>(1.0) / fps;
- //! Fixed delta time for fixed updates in seconds
- std::chrono::duration<double> fixed_delta_time = std::chrono::duration<double>(1.0) / 50.0;
- //! Total elapsed game time in seconds
- std::chrono::duration<double> elapsed_time{0.0};
- //! Total elapsed time for fixed updates in seconds
- std::chrono::duration<double> elapsed_fixed_time{0.0};
- //! Time of the last frame
- std::chrono::steady_clock::time_point last_frame_time;
-};
-
-} // namespace crepe