first commitv1.0.0-beta

1 files changed, 58 insertions, 0 deletions

diff --git a/NvBlast/samples/SampleBase/utils/SampleTime.h b/NvBlast/samples/SampleBase/utils/SampleTime.h
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+++ b/NvBlast/samples/SampleBase/utils/SampleTime.h
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+/*
+* Copyright (c) 2008-2015, NVIDIA CORPORATION.  All rights reserved.
+*
+* NVIDIA CORPORATION and its licensors retain all intellectual property
+* and proprietary rights in and to this software, related documentation
+* and any modifications thereto.  Any use, reproduction, disclosure or
+* distribution of this software and related documentation without an express
+* license agreement from NVIDIA CORPORATION is strictly prohibited.
+*/
+
+#ifndef SAMPLE_TIME_H
+#define SAMPLE_TIME_H
+
+#include <stdint.h>
+
+class Time
+{
+public:
+	Time() : m_lastTickCount(getTimeTicks()) {}
+
+	double Time::getElapsedSeconds()
+	{
+		const int64_t lastTickCount = m_lastTickCount;
+		m_lastTickCount = getTimeTicks();
+		return (m_lastTickCount - lastTickCount) * s_secondsPerTick;
+	}
+
+	double Time::peekElapsedSeconds() const
+	{
+		return (getTimeTicks() - m_lastTickCount) * s_secondsPerTick;
+	}
+
+	double Time::getLastTime() const
+	{
+		return m_lastTickCount * s_secondsPerTick;
+	}
+
+private:
+	static double	getTickDuration()
+	{
+		LARGE_INTEGER a;
+		QueryPerformanceFrequency(&a);
+		return 1.0 / (double)a.QuadPart;
+	}
+
+	int64_t getTimeTicks() const
+	{
+		LARGE_INTEGER a;
+		QueryPerformanceCounter(&a);
+		return a.QuadPart;
+	}
+
+	int64_t				m_lastTickCount;
+	static const double	s_secondsPerTick;
+};
+
+
+#endif
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