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94 lines
3.1 KiB
Java
94 lines
3.1 KiB
Java
/*
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* Copyright (c) 2009-2012 jMonkeyEngine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.jme3.system;
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/**
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* <code>Timer</code> is the base class for a high resolution timer. It is
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* created from getTimer("display system")
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*
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* @author Mark Powell
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* @version $Id: Timer.java,v 1.18 2007/03/09 10:19:34 rherlitz Exp $
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*/
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public abstract class Timer {
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/**
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* Returns the current time in ticks. A tick is an arbitrary measure of time
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* defined by the timer implementation. The number of ticks per second is
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* given by <code>getResolution()</code>. The timer starts at 0 ticks.
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*
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* @return a long value representing the current time
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*/
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public abstract long getTime();
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/**
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* Returns the time in seconds. The timer starts at 0.0 seconds.
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*
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* @return the current time in seconds
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*/
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public float getTimeInSeconds() {
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return getTime() / (float) getResolution();
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}
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/**
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* Returns the resolution of the timer.
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*
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* @return the number of timer ticks per second
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*/
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public abstract long getResolution();
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/**
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* Returns the "calls per second". If this is called every frame, then it
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* will return the "frames per second".
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*
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* @return The "calls per second".
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*/
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public abstract float getFrameRate();
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/**
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* Returns the time, in seconds, between the last call and the current one.
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*
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* @return Time between this call and the last one.
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*/
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public abstract float getTimePerFrame();
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/**
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* <code>update</code> recalculates the frame rate based on the previous
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* call to update. It is assumed that update is called each frame.
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*/
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public abstract void update();
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/**
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* Reset the timer to 0. Clear any tpf history.
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*/
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public abstract void reset();
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}
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