Yatagan/Source
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Revision as of 01:57, 2 April 2013 by Sheldor (talk | contribs) (→Development Version: Changed distance from 160 pixels to 200 pixels.)
Development Version
Codesize: 249
/*
Yatagan 1.0.6 by Sheldor & Skilgannon; Release date: 04/01/2013
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
Codesize: 249 bytes without any colors
Credits:
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified.
And a general thanks to all open source bot authors and contributors to the RoboWiki.
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
package sheldor.jk;
import robocode.*;
import robocode.util.Utils;
public class Yatagan extends AdvancedRobot
{
//Global variables.
static double direction;
static double enemyEnergy;
static int deathCount;
public void run()
{
setAdjustGunForRobotTurn(true);
//Start spinning radar and initialize direction to infinity.
setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
}
public void onScannedRobot(ScannedRobotEvent e)
{
//Local variables.
int integer = 30;
double absoluteBearing;
double distance;
int matchPosition;
//Orbiting/Oscillating/Random movement, all depending on the size of the number you multiply the random with.
if( (char) ((enemyEnergy - 1.09999999999
+ chancesOfReversing.charAt(deathCount)*Math.random()
- (enemyEnergy = e.getEnergy()))) <= 1 )
{
//Reverse direction.
//Calling the onHitWall event saves two bytes.
onHitWall(null);
}
setAhead(direction);
//Stay mostly perpendicular to the enemy, but try to maintain a distance of 200 pixels.
//SHELDOR:Let's try 200 this time.
setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((200.0 - (distance = e.getDistance())) * (getVelocity() / 3000)));
//Pattern Matching.
enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
// search for a match
while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
integer = (int)(distance);
// calculate aim offset
do {
absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) / distance;
} while ((integer -= 12) > 0);
//Aim at the predicted target.
setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
//Fire!
//Bullet power must be a multiple of 0.33333... or else the gun will be inaccurate.
setFire(2.666666666666666666666666666666666666666666666666666666666666666666666666666666666666);
//Infinite radar lock.
setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
}
public void onDeath(DeathEvent e)
{
//When the bot dies, move to the next cell in the table.
deathCount++;
}
public void onHitWall(HitWallEvent e)
{
//Reverse direction.
direction = -direction;
}
//The chance that Yatagan will reverse direction when the enemy fires.
//Since this is an unchanging table, we can use 'final' to save a few bytes.
private static final String chancesOfReversing = ""
+ (char)60000 + (char)0 + (char)60000 + (char) 0 + (char)60000 + (char) 0
//100 rounds of deaths, should be enough?
// range which will produce 'bullet hit': 3.0999 - 0.0999 = 3
//required reverse probability, from Toorkild's formula: 0.6*sqrt((20 - 3*2.5)/160) - 0.04 ~= 0.125
//thus 3/x = 0.125 --> x = 3/0.125 = 24
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+ (char) 24 + (char) 24 + (char) 24 + (char) 24 + (char) 24
+ (char) 24 + (char) 24 + (char) 24 + (char) 24 + (char) 24;
//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking.
static String enemyHistory = ""
+ (char) 1 + (char) 1 + (char) 1 + (char) 1
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}Latest Released Version (1.0.5)
Codesize: 249
/*
Yatagan 1.0.5 by Sheldor & Skilgannon
The yatagan is a short sabre which was used extensively in the Ottoman Empire.
Credits:
Pattern Matching code from simonton.WeekendObsession_S and mld.Moebius, heavily modified,
and a general thanks to all open source bot authors and contributors to the RoboWiki.
Yatagan is open source and released under the terms of the RoboWiki Public Code License (RWPCL) - Version 1.1
see license here: http://robowiki.net/wiki/RWPCL
*/
package sheldor.jk;
import robocode.*;
import robocode.util.Utils;
public class Yatagan extends AdvancedRobot
{
//Global variables.
static double direction;
static double enemyEnergy;
static int deathCount;
//En garde!
public void run()
{
setAdjustGunForRobotTurn(true);
//Start spinning radar and initialize direction to infinity.
setTurnRadarRightRadians(direction = Double.POSITIVE_INFINITY);
}
public void onScannedRobot(ScannedRobotEvent e)
{
//Local variables.
int integer = 30;
double absoluteBearing;
double distance;
int matchPosition;
//Orbiting/Oscillating/Random movement, all depending on how big the number you multiply the random with is.
if( (char) ((enemyEnergy - 1.09999999999
+ chancesOfReversing.charAt(deathCount)*Math.random()
- (enemyEnergy = e.getEnergy()))) <= 1 )
{
onHitWall(null);
}
setAhead(direction);
//Stay perpendicular to the enemy.
setTurnRightRadians(Math.cos(absoluteBearing = e.getBearingRadians()) + ((160.0 - (distance = e.getDistance())) * (getVelocity() / 3000)));
//Pattern Matching.
enemyHistory = String.valueOf((char) (e.getVelocity() * (Math.sin(e.getHeadingRadians() - (absoluteBearing += getHeadingRadians()))))).concat(enemyHistory);
// search for a match
while((matchPosition = enemyHistory.indexOf(enemyHistory.substring(0, integer--), 64)) < 0);
integer = (int)(distance);
// calculate aim offset
do {
absoluteBearing += ((short) enemyHistory.charAt(--matchPosition)) / distance;
} while ((integer -= 12) > 0);
//Aim at the predicted target.
setTurnGunRightRadians(Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
//Fire!
setFire(2.6666666666666666666666666666666666666666666666);
//Infinite radar lock.
setTurnRadarLeftRadians(getRadarTurnRemainingRadians());
}
public void onDeath(DeathEvent e)
{
deathCount++;
}
public void onHitWall(HitWallEvent e)
{
//Reverse direction when the bot hits a wall.
direction = -direction;
}
//chance out of 3 for given number of deaths, 'final' saves a few bytes
private static final String chancesOfReversing = ""
+ (char)60000 + (char)0 + (char)60000 + (char) 0 + (char)60000 + (char)0
//100 rounds of deaths, should be enough?
// range which will produce 'bullet hit': 3.0999 - 0.0999 = 3
//required reverse probability, from Toorkild's formula: 0.6*sqrt((20 - 3*2.5)/160) - 0.04 ~= 0.125
//thus 3/x = 0.125 --> x = 3/0.125 = 24
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//Preloaded log of enemy movements for pattern matcher so it doesn't need error checking
static String enemyHistory = ""
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}
