/*
* 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: 2005/02/05 11:05:27 $
* $Revision: 1.7 $
* $Source: /cvsroot/simbad/src/simbad/gui/AgentFollower.java,v $
*/
package org.myrobotlab.mapper.gui;
import org.myrobotlab.mapper.sim.SimpleAgent;
import org.myrobotlab.mapper.sim.World;
/**
* The AgentFollower class is a helper class for the AgentInspector. It updates
* cyclically the world view point. in order to follow agent movements.
*
*/
class AgentFollower implements Runnable {
World world;
SimpleAgent agent;
Thread thread;
boolean stopped;
boolean changed;
int viewPointType;
AgentFollower(World world, SimpleAgent agent) {
this.agent = agent;
this.world = world;
viewPointType = World.VIEW_ABOVE_AGENT;
stopped = true;
thread = new Thread(this);
thread.start();
}
protected void resume() {
stopped = false;
changed = true;
}
@Override
public void run() {
while (true) {
changed = false;
if (!stopped)
world.changeViewPoint(viewPointType, agent);
try {
// don't need precise time tick
// do multiple sleep to diminish ui latency
for (int i = 0; i < 30; i++) {
Thread.sleep(100);
if (changed)
break;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
protected void setViewPointType(int type) {
viewPointType = type;
}
protected void suspend() {
stopped = true;
changed = true;
}
}