Timing.cpp

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#include <tdme/engine/Timing.h>
 
#include <array>
 
#include <tdme/tdme.h>
#include <tdme/utilities/Time.h>
 
using std::array;
 
using tdme::engine::Timing;
using tdme::utilities::Time;
 
Timing::Timing()
{
    frame = 0;
    startTime = Time::getCurrentMillis();
    lastFrameAtTime = UNDEFINED;
    currentFrameAtTime = UNDEFINED;
    avarageFPS = 60.0f;
    lastFrameAtTime = Timing::UNDEFINED;
    currentFrameAtTime = Timing::UNDEFINED;
    fps = Timing::UNDEFINED;
    avarageFPS = Timing::UNDEFINED;
    for (auto i = 0; i < avarageFPSSequence.size(); i++) avarageFPSSequence[i] = 60.0f;
}
 
constexpr int64_t Timing::UNDEFINED;
 
void Timing::updateTiming()
{
    frame++;
    lastFrameAtTime = currentFrameAtTime;
    currentFrameAtTime = Time::getCurrentMillis();
    fps = 0;
    if (lastFrameAtTime != UNDEFINED) {
        fps = 1000.0f / ((currentFrameAtTime - lastFrameAtTime));
    }
    fps++;
 
    // avarage fps
    avarageFPSIndex = (avarageFPSIndex + 1) % avarageFPSSequence.size();
    avarageFPSSequence[avarageFPSIndex] = fps;
    avarageFPS = 0.0f;
    for (auto i = 0; i < avarageFPSSequence.size(); i++) avarageFPS+= avarageFPSSequence[(avarageFPSIndex - i) % avarageFPSSequence.size()];
    avarageFPS/= avarageFPSSequence.size();
}