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| − | Named after the [[wikipedia:Doppler effect| Doppler Effect]]
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| − | It is the same as {{OldWiki|BulletDoubling}} (Old Wiki)
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| − | [[File:Blue_Shift.JPG|thumb|200px|right|Example of waves that reach enemy at the same time]]
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| − | The picture to the right shows a group of waves clustered together.
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| − |
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| − | == How it Works ==
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| − | Fire a group of bullets that reach your target at the same time, either by moving the robot, changing bullet power, or a combination of both.
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| − |
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| − | == Concept ==
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| − |
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| − | Use only on stationary targets (shows concept when farther away).
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| − | ----
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| − | <syntaxhighlight>
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| − | package wiki;
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| − | import robocode.*;
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| − |
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| − | public class BlueShift extends AdvancedRobot
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| − | {
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| − | double turns;
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| − | double time;
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| − |
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| − | public void run()
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| − | {
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| − | setTurnRadarRightRadians(Double.POSITIVE_INFINITY);
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| − | }
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| − |
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| − | public void onScannedRobot(ScannedRobotEvent e)
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| − | {
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| − | double absoluteBearing = e.getBearingRadians() + getHeadingRadians();
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| − | double distance = e.getDistance();
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| − | setTurnRightRadians(robocode.util.Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians()));
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| − | turns -= getTime() - time;
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| − | time = getTime();
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| − | if (turns <= 0) {
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| − | time = getTime();
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| − | turns = distance / 11;
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| − | setFire(3);
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| − | } else {
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| − | setFire((distance / turns - 20) / -3);
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| − | }
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| − | }
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| − | }
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| − | </syntaxhighlight>
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| − |
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| − | == Improved concept ==
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| − |
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| − | The same concept, but it shots always with bulletdoubles if the distance is long enough. It's also independent from radarsweep, so you can put it in run() to.
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| − |
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| − | <syntaxhighlight>
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| − | package wiki;
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| − |
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| − | import robocode.AdvancedRobot;
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| − | import robocode.ScannedRobotEvent;
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| − |
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| − | public class Bilby extends AdvancedRobot
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| − | {
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| − | double bTurns;
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| − |
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| − | public void run()
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| − | {
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| − | setTurnRadarRightRadians(Double.POSITIVE_INFINITY);
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| − | }
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| − |
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| − | public void onScannedRobot(ScannedRobotEvent e)
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| − | {
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| − | double absoluteBearing = e.getBearingRadians() + getHeadingRadians();
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| − | double distance = e.getDistance();
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| − | setTurnGunRightRadians(robocode.util.Utils.normalRelativeAngle(absoluteBearing - getGunHeadingRadians())); // head-on gun
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| − |
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| − | setTurnRadarLeftRadians(getRadarTurnRemainingRadians()); // just a simple RadarLock
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| − |
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| − | if (getGunTurnRemaining() == 0) // it's usefull to wait with shoting until the gun is in position
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| − | {
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| − | double timeDiff = bTurns-getTime(); // difference between last shot and now
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| − | if (setFireBullet((20 - distance/(timeDiff)) / 3) != null) // shot with bulletPower if ready, bulletPower depends on last shot
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| − | {
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| − | if (timeDiff <= (bTurns=0)) bTurns = getTime() + distance /11; // if you shot with 3.0 bulletPower, calculate the turns when the bullet hit the target
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| − | }
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| − | }
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| − |
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| − | //Test this against multiple sample.SittingDuck - then remove it and look what has changed :)
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| − | clearAllEvents();
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| − | }
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| − | }
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| − | </syntaxhighlight>
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