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/*******************************************************************************
* Copyright (c) 2001, 2008 Mathew A. Nelson and Robocode contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://robocode.sourceforge.net/license/cpl-v10.html
*
* Contributors:
* Mathew A. Nelson
* - Initial implementation
* Flemming N. Larsen
* - Maintainance
*******************************************************************************/
package sample;
import robocode.HitRobotEvent;
import robocode.Robot;
import robocode.ScannedRobotEvent;
import robocode.WinEvent;
import static robocode.util.Utils.normalRelativeAngleDegrees;
import java.awt.*;
/**
* Tracker - a sample robot by Mathew Nelson, and maintained by Flemming N. Larsen
* <p/>
* Locks onto a robot, moves close, fires when close.
*/
public class Tracker extends Robot {
int count = 0; // Keeps track of how long we've
// been searching for our target
double gunTurnAmt; // How much to turn our gun when searching
String trackName; // Name of the robot we're currently tracking
/**
* run: Tracker's main run function
*/
public void run() {
// Set colors
setBodyColor(new Color(128, 128, 50));
setGunColor(new Color(50, 50, 20));
setRadarColor(new Color(200, 200, 70));
setScanColor(Color.white);
setBulletColor(Color.blue);
// Prepare gun
trackName = null; // Initialize to not tracking anyone
setAdjustGunForRobotTurn(true); // Keep the gun still when we turn
gunTurnAmt = 10; // Initialize gunTurn to 10
// Loop forever
while (true) {
// turn the Gun (looks for enemy)
turnGunRight(gunTurnAmt);
// Keep track of how long we've been looking
count++;
// If we've haven't seen our target for 2 turns, look left
if (count > 2) {
gunTurnAmt = -10;
}
// If we still haven't seen our target for 5 turns, look right
if (count > 5) {
gunTurnAmt = 10;
}
// If we *still* haven't seen our target after 10 turns, find another target
if (count > 11) {
trackName = null;
}
}
}
/**
* onScannedRobot: Here's the good stuff
*/
public void onScannedRobot(ScannedRobotEvent e) {
// If we have a target, and this isn't it, return immediately
// so we can get more ScannedRobotEvents.
if (trackName != null && !e.getName().equals(trackName)) {
return;
}
// If we don't have a target, well, now we do!
if (trackName == null) {
trackName = e.getName();
out.println("Tracking " + trackName);
}
// This is our target. Reset count (see the run method)
count = 0;
// If our target is too far away, turn and move toward it.
if (e.getDistance() > 150) {
gunTurnAmt = normalRelativeAngleDegrees(e.getBearing() + (getHeading() - getRadarHeading()));
turnGunRight(gunTurnAmt); // Try changing these to setTurnGunRight,
turnRight(e.getBearing()); // and see how much Tracker improves...
// (you'll have to make Tracker an AdvancedRobot)
ahead(e.getDistance() - 140);
return;
}
// Our target is close.
gunTurnAmt = normalRelativeAngleDegrees(e.getBearing() + (getHeading() - getRadarHeading()));
turnGunRight(gunTurnAmt);
fire(3);
// Our target is too close! Back up.
if (e.getDistance() < 100) {
if (e.getBearing() > -90 && e.getBearing() <= 90) {
back(40);
} else {
ahead(40);
}
}
scan();
}
/**
* onHitRobot: Set him as our new target
*/
public void onHitRobot(HitRobotEvent e) {
// Only print if he's not already our target.
if (trackName != null && !trackName.equals(e.getName())) {
out.println("Tracking " + e.getName() + " due to collision");
}
// Set the target
trackName = e.getName();
// Back up a bit.
// Note: We won't get scan events while we're doing this!
// An AdvancedRobot might use setBack(); execute();
gunTurnAmt = normalRelativeAngleDegrees(e.getBearing() + (getHeading() - getRadarHeading()));
turnGunRight(gunTurnAmt);
fire(3);
back(50);
}
/**
* onWin: Do a victory dance
*/
public void onWin(WinEvent e) {
for (int i = 0; i < 50; i++) {
turnRight(30);
turnLeft(30);
}
}
}
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