*

LifeCore/FrameCounter.cpp

@@ -0,0 +1,78 @@
+#include "FrameCounter.h"
+#include "Timer.h"
+
+namespace LifeCore
+{
+	FrameCounter::FrameCounter()
+		:fps(0.0f), frame_range(50), avg_fps(0.0f), time_elapsed(0.0f),
+		frame_id(0), time_elapsed_avg(0.0f), buffer_pos(0)
+	{
+		timer = new Timer();
+		prev_time = new float[frame_range];
+		for(int i = 0; i < frame_range; i++)
+			prev_time[i] = 0.0f;
+	}
+	FrameCounter::~FrameCounter()
+	{
+		delete[] prev_time;
+	}
+	float FrameCounter::GetFps()
+	{
+		return fps;
+	}
+	float FrameCounter::GetFpsAvg()
+	{
+		return avg_fps;
+	}
+	float FrameCounter::GetTimeElapled()
+	{
+		return time_elapsed;
+	}
+	float FrameCounter::GetTimeElapsedAvg()
+	{
+		return time_elapsed_avg;
+	}
+	void FrameCounter::SetFrameRange(int range)
+	{
+		frame_range = range;
+		buffer_pos = 0;
+		if(prev_time!=0)
+			delete[] prev_time;
+
+		prev_time = new float[frame_range];
+		for(int i = 0; i < frame_range; i++)
+			prev_time[i] = 0.0f;
+	}
+	int FrameCounter::GetFrameId()
+	{
+		return frame_id;
+	}
+	void FrameCounter::OnFrameEnd()
+	{
+		timer->Stop();
+
+		//get frame time elapsed
+		time_elapsed = timer->getTimeElapsed();
+		//store time elapsed in buffer
+		prev_time[frame_id % frame_range] = time_elapsed;
+		//fix offset
+		buffer_pos++;
+		if(buffer_pos >= frame_range)
+			buffer_pos = 0;
+
+		fps = 1.0f / time_elapsed;
+
+		//compute average time elapsed
+		float sum = 0.0f;
+		for(int i = 0; i < frame_range; i++)
+			sum += prev_time[i];
+
+		time_elapsed_avg = sum / (float)frame_range;
+
+		avg_fps = 1.0f / time_elapsed_avg;
+
+		frame_id++;
+
+		timer->Start();
+	}
+}