/*
* Simbad - Robot Simulator
* Copyright (C) 2004 Louis Hugues
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
-----------------------------------------------------------------------------
* $Author: sioulseuguh $
* $Date: 2005/03/17 17:49:37 $
* $Revision: 1.6 $
* $Source: /cvsroot/simbad/src/simbad/sim/FrameMeter.java,v $
*/
package org.myrobotlab.mapper.sim;
/* A helper class to measure the frame per second at a given point. */
final class FrameMeter {
private long lastTime;
private long startTime;
private long count;
private long totalCount;
/** Instant fps */
public float fps;
public float fpsSinceStart;
private int updateRate;
public FrameMeter() {
updateRate = 200;
reset();
}
public int getUpdateRate() {
return updateRate;
}
/*
* Method to be called at the measure point
*/
public void measurePoint(int inc) {
count += inc;
totalCount += inc;
if (count >= updateRate) {
long currTime = System.currentTimeMillis();
long dt = (currTime - lastTime);
if (dt != 0)
fps = (1000f * count) / dt;
fpsSinceStart = (1000f * totalCount) / (currTime - startTime);
lastTime = currTime;
count = 0;
}
}
/* Resets the measure */
public void reset() {
startTime = lastTime = System.currentTimeMillis();
totalCount = 0;
count = 0;
fps = 0;
fpsSinceStart = 0;
}
public void setUpdateRate(int rate) {
updateRate = rate;
reset();
}
}