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Hi, I mixed two sample bots and then edited it to my liking.

Please let me know what you think, and give me some programming tips! This is my first robot.

It is heavily commented, so you don't need much time to understand what it is doing, and beginners might be able to understand it to (even I do, so they must!)


Background Information

Bot Name
What's special about it?
This bot finds an enemy, and then starts spiraling around it.
Great, I want to try it. Where can I download it?
Source code is below, compile it yourself
How competitive is it?
not at all.


How does it move?
It circles around the enemy it is currently firing at.
How does it fire?
Straight fire, bullet size based on distance.
How does it dodge bullets?
It rides almost parallel to the selected enemy. Too bad in melee other bots can still attack it easily
How does it select a target to attack/avoid in melee?
First target that he sees.
What does it save between rounds and matches?

Additional Information

Where did you get the name?
Ehm, it is a circling bot?
Can I use your code?
Sure thing
What's next for your robot?
+ If the scanner comes across a robot that is closer, I want it to select that one. I don't know how I am going to do that yet..
+ There is a little glitch that when my robot comes too close it will stop firing because it can not aim properly. If I take some time I might be able to fix that.
+ It could use a way to predict where to shoot, instead of just firing directly at its current location. However, I think I am going to save that for a next bot.
Does it have any White Whales?
Every serious bot? However, in melee it does win from all the sample bots, and from all the super sample bots! both in 600x800 as in 1000x1000!
What other robot(s) is it based on?
It started originally by editing sample.Crazy and adding code from sample.TrackFire into it.


package hapiel;

import robocode.*;
import static robocode.util.Utils.normalRelativeAngleDegrees;
import java.awt.*;

 * CirclingBot 1.0 - an edit origionally on sample.Crazy
 * By Hapiel. Please do point out improvement points and problems on the wiki page
 * I am eager to learn!

public class CirclingBot extends AdvancedRobot {
	boolean movingForward; // Is set to true when setAhead is called, set to false on setBack
	boolean inWall; // Is true when robot is near the wall.

	public void run() {
		// Set colors
		setBodyColor(new Color(221, 175, 19));
		setGunColor(new Color(11,77,113));
		setRadarColor(new Color(99,228,199));
		setBulletColor(new Color(255,238,0));
		setScanColor(new Color(255,241,46));
		// Every part of the robot moves freely from the others.
		// Check if the robot is closer than 50px from the wall.
		if (getX() <= 50 || getY() <= 50 || getBattleFieldWidth() - getX() <= 50 || getBattleFieldHeight() - getY() <= 50) {
				inWall = true;
			} else {
			inWall = false;
		setAhead(40000); // go ahead until you get commanded to do differently
		setTurnRadarRight(360); // scan until you find your first enemy
		movingForward = true; // we called setAhead, so movingForward is true
		while (true) {
 			* Check if we are near the wall, and check if we have noticed (inWall boolean) yet.
			* If we have noticed yet, do nothing
			* If we have not noticed yet, reverseDirection and set inWall to true
 			* If we are out of the wall, reset inWall
			if (getX() > 50 && getY() > 50 && getBattleFieldWidth() - getX() > 50 && getBattleFieldHeight() - getY() > 50 && inWall == true) {
				inWall = false;
			if (getX() <= 50 || getY() <= 50 || getBattleFieldWidth() - getX() <= 50 || getBattleFieldHeight() - getY() <= 50 ) {
				if ( inWall == false){
					inWall = true;

			// If the radar stopped turning, take a scan of the whole field until we find a new enemy
			if (getRadarTurnRemaining() == 0.0){
			execute(); // execute all actions set.
	 * onHitWall:  There is a small chance the robot will still hit a wall
	public void onHitWall(HitWallEvent e) {
		// Bounce off!

	 * reverseDirection:  Switch from ahead to back & vice versa
	public void reverseDirection() {
		if (movingForward) {
			movingForward = false;
		} else {
			movingForward = true;

	public void onScannedRobot(ScannedRobotEvent e) {
		// Calculate exact location of the robot
		double absoluteBearing = getHeading() + e.getBearing();
		double bearingFromGun = normalRelativeAngleDegrees(absoluteBearing - getGunHeading());
		double bearingFromRadar = normalRelativeAngleDegrees(absoluteBearing - getRadarHeading());
		//Spiral around our enemy. 90 degrees would be circling it (parallel at all times)
		// 80 and 100 make that we move a bit closer every turn.
		if (movingForward){
			setTurnRight(normalRelativeAngleDegrees(e.getBearing() + 80));
		} else {
			setTurnRight(normalRelativeAngleDegrees(e.getBearing() + 100));

		// If it's close enough, fire!
		if (Math.abs(bearingFromGun) <= 4) {
			setTurnRadarRight(bearingFromRadar); // keep the radar focussed on the enemy
			// We check gun heat here, because calling fire()
			// uses a turn, which could cause us to lose track
			// of the other robot.
			// The close the enmy robot, the bigger the bullet. 
			// The more precisely aimed, the bigger the bullet.
			// Don't fire us into disability, always save .1
			if (getGunHeat() == 0 && getEnergy() > .2) {
				fire(Math.min(4.5 - Math.abs(bearingFromGun) / 2 - e.getDistance() / 250, getEnergy() - .1));
		} // otherwise just set the gun to turn.
		else {
		// Generates another scan event if we see a robot.
		// We only need to call this if the radar
		// is not turning.  Otherwise, scan is called automatically.
		if (bearingFromGun == 0) {

	 * onHitRobot:  Back up!
	public void onHitRobot(HitRobotEvent e) {
		// If we're moving the other robot, reverse!
		if (e.isMyFault()) {