diff options
Diffstat (limited to 'src/crepe/api/LoopTimer.cpp')
| -rw-r--r-- | src/crepe/api/LoopTimer.cpp | 95 | 
1 files changed, 46 insertions, 49 deletions
diff --git a/src/crepe/api/LoopTimer.cpp b/src/crepe/api/LoopTimer.cpp index 039e35e..8f09e41 100644 --- a/src/crepe/api/LoopTimer.cpp +++ b/src/crepe/api/LoopTimer.cpp @@ -7,83 +7,80 @@  using namespace crepe; -LoopTimer::LoopTimer() { -    dbg_trace(); -} +LoopTimer::LoopTimer() { dbg_trace(); }  LoopTimer & LoopTimer::get_instance() { -    static LoopTimer instance; -    return instance; +	static LoopTimer instance; +	return instance;  }  void LoopTimer::start() { -    this->last_frame_time = std::chrono::steady_clock::now(); -    this->elapsed_time = std::chrono::milliseconds(0); -    this->elapsed_fixed_time = std::chrono::milliseconds(0); -    this->delta_time = std::chrono::milliseconds(0); +	this->last_frame_time = std::chrono::steady_clock::now(); +	this->elapsed_time = std::chrono::milliseconds(0); +	this->elapsed_fixed_time = std::chrono::milliseconds(0); +	this->delta_time = std::chrono::milliseconds(0);  }  void LoopTimer::update() { -    auto current_frame_time = std::chrono::steady_clock::now(); -    // Convert to duration in seconds for delta time -    this->delta_time = std::chrono::duration_cast<std::chrono::duration<double>>(current_frame_time - last_frame_time); - -    if (this->delta_time > this->maximum_delta_time) { -        this->delta_time = this->maximum_delta_time; -    } - -    this->delta_time *= this->game_scale; -    this->elapsed_time += this->delta_time; -    this->last_frame_time = current_frame_time; +	auto current_frame_time = std::chrono::steady_clock::now(); +	// Convert to duration in seconds for delta time +	this->delta_time +		= std::chrono::duration_cast<std::chrono::duration<double>>( +			current_frame_time - last_frame_time); + +	if (this->delta_time > this->maximum_delta_time) { +		this->delta_time = this->maximum_delta_time; +	} + +	this->delta_time *= this->game_scale; +	this->elapsed_time += this->delta_time; +	this->last_frame_time = current_frame_time;  } -double LoopTimer::get_delta_time() const { -    return this->delta_time.count(); -} +double LoopTimer::get_delta_time() const { return this->delta_time.count(); }  double LoopTimer::get_current_time() const { -    return this->elapsed_time.count(); +	return this->elapsed_time.count();  }  void LoopTimer::advance_fixed_update() { -    this->elapsed_fixed_time += this->fixed_delta_time; +	this->elapsed_fixed_time += this->fixed_delta_time;  }  double LoopTimer::get_fixed_delta_time() const { -    return this->fixed_delta_time.count(); +	return this->fixed_delta_time.count();  }  void LoopTimer::set_fps(int fps) { -    this->fps = fps; +	this->fps = fps;  	// target time per frame in seconds -    this->frame_target_time = std::chrono::seconds(1) / fps;  +	this->frame_target_time = std::chrono::seconds(1) / fps;  } -int LoopTimer::get_fps() const { -    return this->fps; -} +int LoopTimer::get_fps() const { return this->fps; } -void LoopTimer::set_game_scale(double value) { -    this->game_scale = value; -} +void LoopTimer::set_game_scale(double value) { this->game_scale = value; } -double LoopTimer::get_game_scale() const { -    return this->game_scale; -} +double LoopTimer::get_game_scale() const { return this->game_scale; }  void LoopTimer::enforce_frame_rate() { -    std::chrono::steady_clock::time_point current_frame_time = std::chrono::steady_clock::now(); -    std::chrono::milliseconds frame_duration = std::chrono::duration_cast<std::chrono::milliseconds>(current_frame_time - this->last_frame_time); - -    if (frame_duration < this->frame_target_time) { -        std::chrono::milliseconds delay_time = std::chrono::duration_cast<std::chrono::milliseconds>(this->frame_target_time - frame_duration); -        if (delay_time.count() > 0) { -            SDLContext::get_instance().delay(delay_time.count()); -        } -    } - -    this->last_frame_time = current_frame_time; +	std::chrono::steady_clock::time_point current_frame_time +		= std::chrono::steady_clock::now(); +	std::chrono::milliseconds frame_duration +		= std::chrono::duration_cast<std::chrono::milliseconds>( +			current_frame_time - this->last_frame_time); + +	if (frame_duration < this->frame_target_time) { +		std::chrono::milliseconds delay_time +			= std::chrono::duration_cast<std::chrono::milliseconds>( +				this->frame_target_time - frame_duration); +		if (delay_time.count() > 0) { +			SDLContext::get_instance().delay(delay_time.count()); +		} +	} + +	this->last_frame_time = current_frame_time;  }  double LoopTimer::get_lag() const { -    return (this->elapsed_time - this->elapsed_fixed_time).count(); +	return (this->elapsed_time - this->elapsed_fixed_time).count();  }  |