first commit

Minecraft.World/PerformanceTimer.cpp

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+#include "stdafx.h"
+#include "PerformanceTimer.h"
+
+PerformanceTimer::PerformanceTimer()
+{
+#ifndef _CONTENT_PACKAGE
+	// Get the frequency of the timer
+	LARGE_INTEGER qwTicksPerSec;
+	QueryPerformanceFrequency( &qwTicksPerSec );
+	m_fSecsPerTick = 1.0f / (float)qwTicksPerSec.QuadPart;
+	
+	Reset();
+#endif
+}
+
+void PerformanceTimer::Reset()
+{
+#ifndef _CONTENT_PACKAGE
+	QueryPerformanceCounter( &m_qwStartTime );
+#endif
+}
+
+void PerformanceTimer::PrintElapsedTime(const wstring &description)
+{
+#ifndef _CONTENT_PACKAGE
+	LARGE_INTEGER qwNewTime, qwDeltaTime;
+
+	QueryPerformanceCounter( &qwNewTime );
+
+	qwDeltaTime.QuadPart = qwNewTime.QuadPart - m_qwStartTime.QuadPart;
+	float fElapsedTime = m_fSecsPerTick * ((FLOAT)(qwDeltaTime.QuadPart));
+
+	app.DebugPrintf("TIMER: %ls: Elapsed time %f\n", description.c_str(), fElapsedTime);
+#endif
+}