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Diffstat (limited to 'src/crepe/api/LoopTimer.cpp')
-rw-r--r--src/crepe/api/LoopTimer.cpp68
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;
+}