diff options
Diffstat (limited to 'src/crepe/api/LoopTimer.cpp')
-rw-r--r-- | src/crepe/api/LoopTimer.cpp | 68 |
1 files changed, 37 insertions, 31 deletions
diff --git a/src/crepe/api/LoopTimer.cpp b/src/crepe/api/LoopTimer.cpp index dd4d7e5..f68d75a 100644 --- a/src/crepe/api/LoopTimer.cpp +++ b/src/crepe/api/LoopTimer.cpp @@ -1,45 +1,48 @@ +#include "LoopTimer.h" #include "../facade/SDLContext.h" #include "../util/log.h" -#include "LoopTimer.h" using namespace crepe; -LoopTimer::LoopTimer() { - dbg_trace(); -} +LoopTimer::LoopTimer() { dbg_trace(); } -LoopTimer& LoopTimer::get_instance() { - static LoopTimer instance; - return instance; +LoopTimer & LoopTimer::get_instance() { + static LoopTimer instance; + return instance; } void LoopTimer::start() { - this->last_frame_time = SDLContext::get_instance().get_ticks(); - this->elapsed_time = 0; - this->elapsed_fixed_time = 0; - this->delta_time = 0; + this->last_frame_time = SDLContext::get_instance().get_ticks(); + this->elapsed_time = 0; + this->elapsed_fixed_time = 0; + this->delta_time = 0; } void LoopTimer::update() { - uint64_t current_frame_time = SDLContext::get_instance().get_ticks(); - this->delta_time = (current_frame_time - last_frame_time); + uint64_t current_frame_time = SDLContext::get_instance().get_ticks(); + this->delta_time = (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; + 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; } double LoopTimer::get_current_time() const { return this->elapsed_time; } -void LoopTimer::advance_fixed_update() { this->elapsed_fixed_time += this->fixed_delta_time; } -double LoopTimer::get_fixed_delta_time() const { return this->fixed_delta_time; } +void LoopTimer::advance_fixed_update() { + this->elapsed_fixed_time += this->fixed_delta_time; +} +double LoopTimer::get_fixed_delta_time() const { + return this->fixed_delta_time; +} void LoopTimer::set_fps(int fps) { - this->fps = fps; - this->frame_target_time = 1000.0 / this->fps; + this->fps = fps; + //! use fps to calculate frame_target_time in ms + this->frame_target_time = 1000.0 / this->fps; } int LoopTimer::get_fps() const { return this->fps; } @@ -47,15 +50,18 @@ void LoopTimer::set_game_scale(double value) { this->game_scale = value; } double LoopTimer::get_game_scale() const { return this->game_scale; } void LoopTimer::enforce_frame_rate() { - uint64_t current_frame_time = SDLContext::get_instance().get_ticks(); - double frame_duration = (current_frame_time - this->last_frame_time); + uint64_t current_frame_time = SDLContext::get_instance().get_ticks(); + double frame_duration = (current_frame_time - this->last_frame_time); - if (frame_duration < this->frame_target_time) { - uint32_t delay_time = static_cast<uint32_t>(this->frame_target_time - frame_duration); - SDLContext::get_instance().delay(delay_time); - } + if (frame_duration < this->frame_target_time) { + uint32_t delay_time + = static_cast<uint32_t>(this->frame_target_time - frame_duration); + SDLContext::get_instance().delay(delay_time); + } - this->last_frame_time = current_frame_time; + this->last_frame_time = current_frame_time; } -double LoopTimer::get_lag() const { return this->elapsed_time - this->elapsed_fixed_time; } +double LoopTimer::get_lag() const { + return this->elapsed_time - this->elapsed_fixed_time; +} |