Copy irrlichtmt to <root>/irr/

irr/include/ITimer.h

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+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#pragma once
+
+#include "IReferenceCounted.h"
+
+namespace irr
+{
+
+//! Interface for getting and manipulating the virtual time
+class ITimer : public virtual IReferenceCounted
+{
+public:
+	//! Returns current real time in milliseconds of the system.
+	/** This value does not start with 0 when the application starts.
+	For example in one implementation the value returned could be the
+	amount of milliseconds which have elapsed since the system was started.
+	*/
+	virtual u32 getRealTime() const = 0;
+
+	//! Returns current virtual time in milliseconds.
+	/** This value starts with 0 and can be manipulated using setTime(),
+	stopTimer(), startTimer(), etc. This value depends on the set speed of
+	the timer if the timer is stopped, etc. If you need the system time,
+	use getRealTime() */
+	virtual u32 getTime() const = 0;
+
+	//! sets current virtual time
+	virtual void setTime(u32 time) = 0;
+
+	//! Stops the virtual timer.
+	/** The timer is reference counted, which means everything which calls
+	stop() will also have to call start(), otherwise the timer may not
+	start/stop correctly again. */
+	virtual void stop() = 0;
+
+	//! Starts the virtual timer.
+	/** The timer is reference counted, which means everything which calls
+	stop() will also have to call start(), otherwise the timer may not
+	start/stop correctly again. */
+	virtual void start() = 0;
+
+	//! Sets the speed of the timer
+	/** The speed is the factor with which the time is running faster or
+	slower then the real system time. */
+	virtual void setSpeed(f32 speed = 1.0f) = 0;
+
+	//! Returns current speed of the timer
+	/** The speed is the factor with which the time is running faster or
+	slower then the real system time. */
+	virtual f32 getSpeed() const = 0;
+
+	//! Returns if the virtual timer is currently stopped
+	virtual bool isStopped() const = 0;
+
+	//! Advances the virtual time
+	/** Makes the virtual timer update the time value based on the real
+	time. This is called automatically when calling IrrlichtDevice::run(),
+	but you can call it manually if you don't use this method. */
+	virtual void tick() = 0;
+};
+
+} // end namespace irr