159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/* 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2009-2010 jMonkeyEngine 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions of source code must retain the above copyright 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions in binary form must reproduce the above copyright 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer in the 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * documentation and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * may be used to endorse or promote products derived from this software 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * without specific prior written permission. 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage com.jme3.system; 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * <code>Timer</code> is the base class for a high resolution timer. It is 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * created from getTimer("display system") 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @author Mark Powell 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @version $Id: Timer.java,v 1.18 2007/03/09 10:19:34 rherlitz Exp $ 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapublic abstract class Timer { 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the current time in ticks. A tick is an arbitrary measure of time 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * defined by the timer implementation. The number of ticks per second is 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * given by <code>getResolution()</code>. The timer starts at 0 ticks. 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return a long value representing the current time 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract long getTime(); 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the time in seconds. The timer starts 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * at 0.0 seconds. 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the current time in seconds 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float getTimeInSeconds() { 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return getTime() / (float) getResolution(); 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the resolution of the timer. 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the number of timer ticks per second 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract long getResolution(); 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the "calls per second". If this is called every frame, then it 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * will return the "frames per second". 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return The "calls per second". 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract float getFrameRate(); 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the time, in seconds, between the last call and the current one. 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return Time between this call and the last one. 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract float getTimePerFrame(); 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * <code>update</code> recalculates the frame rate based on the previous 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * call to update. It is assumed that update is called each frame. 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract void update(); 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Reset the timer to 0. Clear any tpf history. 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract void reset(); 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 95