Talk:ÉpéeistMicro

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Thread titleRepliesLast modified
MicroBot champ!1601:30, 7 May 2013
Bug1214:40, 10 January 2013
Wow!313:34, 10 January 2013

MicroBot champ!

Congrats dude! From someone who knows how tough it is to dethrone Skilgannon... =)

Voidious‎16:11, 30 April 2013

Thanks!

I tried for a long time to improve the gun, but that didn't work so I ended up just copying Toorkild's new mode selection and improving anti-ram.

Now it's only a matter of waiting for Toorkild 0.4.6. :(

Sheldor‎16:21, 30 April 2013
 

Wow, impressed that you managed to squeeze that in. Of course, Toorkild is now functionally equivalent at 711 bytes, the real issue is thinking of something to add =) And half of your score margin is from not being in LittleBlackBook's books... perhaps it is time for Waylander to make a comeback?

Skilgannon‎09:05, 1 May 2013

I wouldn't mind seeing Decado, Waylander, Toorkild, and Connavar back in the rumble. The rule is to not have multiple versions of the same bot in the rumble, not to not have multiple similar bots in the rumble.

Sheldor‎20:00, 1 May 2013
 

Mwa Ha Ha!

I just did something absolutely brilliant which squeezed 14 bytes from the GFT system itself, and I now have 18 bytes free, plus ~9 bytes if I get desperate. Any ideas about what I should do with that space?

Sheldor‎19:41, 1 May 2013

Huh, it seems it wasn't so brilliant after all. Version 1.9.0 is ~0.5 APS lower than 1.8.0.

The main change was to the way the wave system gathers bearing offsets. Version 1.8.0 used the traditional, coordinate-based method, whereas version 1.9.0 sums angular velocities. I made sure to keep it as precise as I could, I even adjusted the distance by which I divide the lateral velocity to calculate angular velocities with advancing velocities (actually negative advancing velocities, you might call them "retreating velocities") to account for the opponent moving toward or away from the source location of the wave.

Is there some obscure element of Robocode physics that makes sums of angular velocities inaccurate? Or is there a bug in my code?

Sheldor‎01:57, 2 May 2013
 

Don't think anything about Robocode itself should lead to an inaccuracy. Could it be a normalization bug? When normalizing angles, an individual angle is equivalent no matter how it gets normalized, but if you're summing or averaging them it can screw things up. E.g., average of {2.9, 3.0, 3.1, -3.1, -3.0, -2.9} is 0, but you'd want the result to be something more like pi.

Voidious‎03:23, 2 May 2013

Normalization should be irrelevant because everything is already relative.

I might be on to something though. I'm wondering if the inaccuracy is coming from the original absoluteBearing being used to calculate LV and AV. Should it be updated with angular velocities?

Sheldor‎04:05, 2 May 2013
 

You'd need to keep a list of the positions you were in and backtrace the enemy movement until the wave could originate at your location - a sort of backwards wave, as it were, otherwise you are getting the angular velocities from your current location, not from where you were when you wanted to fire. Also, are the indexes for the VCS calculated using the values from when you were firing, or when you are having the wave hit?

Skilgannon‎08:59, 2 May 2013

All segmentation is calculated when the wave is fired.

Why do you think I'm getting the angular velocities relative to EM's current location? I store the absoluteBearing from the tick in which the wave was fired, and both e.getVelocity() and e.getHeadingRadians() are absolute and shouldn't be relative to anything.

Thanks

Sheldor‎12:37, 2 May 2013

Ah, OK, looking at the source I see that you've still kept the wave structure, I thought you had completely gotten rid of it and then each tick look back to see what wave would hit now over the last N ticks of bullet flight time and retro-actively construct the wave from the conditions as they were then. What you've done isn't quite that drastic =)

As for what is different, have you tried projecting the point back into the cartesian plane and printing it to see if it is the same as the actual enemy location? How about using both types of tracking at once and seeing if they are giving the same results at wave-hit time?

Skilgannon‎13:22, 2 May 2013
 

Here is a sample of the console output from a match against Aristocles: 

^^^ TEXT TRUNCATED ^^^
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New Method - Tick: 515 - -0.07132933707850095
Old Method - Tick: 515 - 0.09391585520909196
New Method - Tick: 515 - -0.13350032361945777
New Method - Tick: 515 - 0.10966909164525457
New Method - Tick: 516 - 0.03431353092685463
New Method - Tick: 516 - -0.06535883414209281
Old Method - Tick: 516 - 0.14046156856131553
New Method - Tick: 516 - 0.14517394071016737
Old Method - Tick: 516 - 0.16311846814753395
New Method - Tick: 517 - 0.02678398641086776
Old Method - Tick: 517 - 0.18125901089735397
Old Method - Tick: 517 - 0.20400647983610298
Old Method - Tick: 518 - 0.23839737797471905
New Method - Tick: 519 - -0.24993242047494296
Old Method - Tick: 519 - 0.2619734772556086
New Method - Tick: 519 - 0.31497178060455416
Old Method - Tick: 520 - 0.28131803697981717
New Method - Tick: 520 - -0.060455259921373884
Old Method - Tick: 521 - 0.29290033395189496
New Method - Tick: 522 - -0.07502984289909014
Old Method - Tick: 522 - 0.2960367157168413
New Method - Tick: 522 - -0.29619178040319977
Old Method - Tick: 523 - 0.2899908526755475
New Method - Tick: 523 - 0.22169448823247304
Old Method - Tick: 524 - 0.2760204846278116
Old Method - Tick: 525 - 0.25577027201679137
New Method - Tick: 526 - 0.15245120142562935
New Method - Tick: 526 - -0.22812338529550522
Old Method - Tick: 526 - 0.22930969968853532
Old Method - Tick: 527 - 0.19668849565923807
Old Method - Tick: 528 - 0.16725117335496087
Old Method - Tick: 529 - 0.14110692751317888
New Method - Tick: 530 - 0.1412167984332873
Old Method - Tick: 530 - 0.10884652853130561
Old Method - Tick: 531 - 0.07964887886982464
New Method - Tick: 531 - -0.0810958634673436
New Method - Tick: 531 - 5.897452652249852E-4
New Method - Tick: 532 - 0.01902162842853444
New Method - Tick: 532 - -0.08149230223197829
Old Method - Tick: 532 - 0.05497008902185918
Old Method - Tick: 533 - 0.03326246412528633
New Method - Tick: 533 - 0.042695473939825736
Old Method - Tick: 534 - 0.014584881686217521
New Method - Tick: 535 - 0.020269013411352108
Old Method - Tick: 535 - -9.690074222916678E-4
New Method - Tick: 536 - -0.009596987690487153
Old Method - Tick: 536 - -0.022698811856896484
New Method - Tick: 536 - 0.01943110788083105
Old Method - Tick: 536 - -0.04758080623707883
Old Method - Tick: 537 - -0.06598990578246333
New Method - Tick: 538 - 0.018835370643752222
Old Method - Tick: 538 - -0.07467365319832098
New Method - Tick: 539 - -0.035456421395411754
New Method - Tick: 539 - -0.061056158782288504
Old Method - Tick: 539 - -0.08368798941205657
New Method - Tick: 539 - 0.04190673169846087
Old Method - Tick: 540 - -0.08311431685420168
Old Method - Tick: 541 - -0.07291687943394187
New Method - Tick: 542 - 0.05769422064795285
Old Method - Tick: 542 - -0.05643122097141684
New Method - Tick: 543 - -0.018503081588482
New Method - Tick: 543 - -0.04231620583648981
Old Method - Tick: 543 - -0.03374614546503585
New Method - Tick: 543 - 0.01682262513855787
New Method - Tick: 544 - 0.015501153805450427
Old Method - Tick: 544 - -0.0049686422443038225
New Method - Tick: 545 - -0.013208912037196915
Old Method - Tick: 545 - 0.029736782213975577
New Method - Tick: 545 - -0.012661903080969608
Old Method - Tick: 546 - 0.06999273507585069
New Method - Tick: 546 - 0.07214868477423399
New Method - Tick: 546 - -0.020117819029679622
Old Method - Tick: 547 - 0.11257498982935532
Old Method - Tick: 548 - 0.15675215836404144
New Method - Tick: 548 - -0.1670853333757256
New Method - Tick: 548 - -0.07283786682336481
Old Method - Tick: 549 - 0.19536375960979324
New Method - Tick: 549 - 0.23017212843685103
Old Method - Tick: 550 - 0.21875697269535332
Old Method - Tick: 551 - 0.2455376323052989
New Method - Tick: 552 - 0.0330083050561058
Old Method - Tick: 552 - 0.2694079618210987
New Method - Tick: 552 - -0.15564066699115975
Old Method - Tick: 553 - 0.2821507354130621
New Method - Tick: 553 - -0.2924143744002721
Old Method - Tick: 554 - 0.2824911546939428
Old Method - Tick: 555 - 0.27669062651924325
New Method - Tick: 555 - 0.26008665921713736
Old Method - Tick: 556 - 0.2637974319085832
New Method - Tick: 557 - 0.058142759064519475
Old Method - Tick: 557 - 0.2540467826384143
New Method - Tick: 557 - -0.1876115085104718
New Method - Tick: 558 - -0.24792638079509347
Old Method - Tick: 558 - 0.25454507966729545
Old Method - Tick: 559 - 0.2548703664537104
Old Method - Tick: 560 - 0.25525167048969966
New Method - Tick: 561 - 0.11600118570824959
Old Method - Tick: 561 - 0.26579890216887336
Old Method - Tick: 562 - 0.2761838593688304
Old Method - Tick: 563 - 0.2866128447908334
Old Method - Tick: 564 - 0.2969202811951328
New Method - Tick: 564 - -0.2740181388324343
New Method - Tick: 565 - 0.20634503267166837
Old Method - Tick: 565 - 0.30706624364667423
New Method - Tick: 566 - -0.25236612652453705
Old Method - Tick: 566 - 0.313222884543469
New Method - Tick: 567 - 0.3078270673958768
Old Method - Tick: 567 - 0.3095104990958406
New Method - Tick: 567 - -0.006545734643486848
Old Method - Tick: 568 - 0.2964133043472643
Old Method - Tick: 569 - 0.2774838827853665
Old Method - Tick: 570 - 0.2527009764430055
New Method - Tick: 571 - -0.25238054453759357
Old Method - Tick: 571 - 0.225218732731026
New Method - Tick: 572 - -0.10756332853954043
Old Method - Tick: 572 - 0.19497105677460125
New Method - Tick: 572 - 0.056675186941033164
New Method - Tick: 573 - 0.18615223915590853
Old Method - Tick: 573 - 0.16776538379857775
Old Method - Tick: 574 - 0.14356874905519912
New Method - Tick: 575 - -0.01570802316837205
Old Method - Tick: 575 - 0.12235173377070363
New Method - Tick: 575 - -0.08773334711104014
New Method - Tick: 576 - -0.025353454575477233
Old Method - Tick: 576 - 0.11345160768459284
Old Method - Tick: 576 - 0.11729707647375731
New Method - Tick: 577 - 0.09025584443520074
Old Method - Tick: 577 - 0.1213375185641854
New Method - Tick: 577 - 0.12665608972528775
New Method - Tick: 578 - -0.08232607243228518
Old Method - Tick: 578 - 0.12379969169013139
New Method - Tick: 578 - 0.05725009615201489
Old Method - Tick: 579 - 0.12578382144606914
Old Method - Tick: 579 - 0.11996712134001153
New Method - Tick: 579 - -0.1279624462458224
Old Method - Tick: 580 - 0.1093618815390105
New Method - Tick: 581 - 0.013063278883171225
Old Method - Tick: 581 - 0.0916042678944855
Old Method - Tick: 582 - 0.06690797876374832
SYSTEM: sheldor.micro.EpeeistMicro 1.9.0* has died
New Method - Tick: 582 - 0.06085342630254822
New Method - Tick: 582 - -0.06258786528602456
Old Method - Tick: 582 - 0.04657607501171923
New Method - Tick: 582 - 2.8660691268322675E-4

Obviously, something isn't right. Could this be some kind of event timing error? Like how energy drops are always detected two ticks late?

Sheldor‎15:01, 2 May 2013
Show 5 replies
 
 
 
 
 

Bug

It seems ÉpéeistMicro has a bug somewhere in its gun code. It's throwing "ArrayIndexOutOfBounds" and "NullPointer" exceptions, especially against mirror bots.

The only change I made to the GF code was to change the constant MEA from .7 to 0.727272727272727272727273.

Any ideas?

Thanks

Sheldor‎16:05, 8 January 2013

Could you post stacktraces?

Jdev‎16:31, 8 January 2013
 

Here is the console from a battle against stelo.MirrorMicro 1.1. 

=========================
Round 1 of 35
=========================
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 has died
=========================
Round 2 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
	at sheldor.micro.EpeeistMicro$Wave.test(EpeeistMicro.java:219)
	at net.sf.robocode.host.events.EventManager.callUserCode(EventManager.java:436)
	at net.sf.robocode.host.events.EventManager.processEvents(EventManager.java:377)
	at net.sf.robocode.host.proxies.BasicRobotProxy.executeImpl(BasicRobotProxy.java:417)
	at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:228)
	at java.lang.Thread.run(Unknown Source)
=========================
Round 3 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
	at sheldor.micro.EpeeistMicro$Wave.test(EpeeistMicro.java:219)
	at net.sf.robocode.host.events.EventManager.callUserCode(EventManager.java:436)
	at net.sf.robocode.host.events.EventManager.processEvents(EventManager.java:377)
	at net.sf.robocode.host.proxies.BasicRobotProxy.executeImpl(BasicRobotProxy.java:417)
	at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:228)
	at java.lang.Thread.run(Unknown Source)
=========================
Round 4 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
	at sheldor.micro.EpeeistMicro$Wave.test(EpeeistMicro.java:219)
	at net.sf.robocode.host.events.EventManager.callUserCode(EventManager.java:436)
	at net.sf.robocode.host.events.EventManager.processEvents(EventManager.java:377)
	at net.sf.robocode.host.proxies.BasicRobotProxy.executeImpl(BasicRobotProxy.java:417)
	at net.sf.robocode.host.proxies.HostingRobotProxy.run(HostingRobotProxy.java:228)
	at java.lang.Thread.run(Unknown Source)
=========================
Round 5 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 10
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 6 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 7 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 8 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 9 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 10 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 11 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 12 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 13 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 14 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 15 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 9
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 16 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 17 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 8
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 18 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 12
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 19 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 20 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 has died
=========================
Round 21 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 22 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 8
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 23 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 8
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 24 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 25 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 26 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 27 of 35
=========================
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 has died
=========================
Round 28 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 29 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 30 of 35
=========================
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 has died
=========================
Round 31 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 32 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 33 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 12
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
=========================
Round 34 of 35
=========================
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
SYSTEM: Exception occurred on robocode.ScannedRobotEvent
java.lang.ArrayIndexOutOfBoundsException
java.lang.NullPointerException
=========================
Round 35 of 35
=========================
SYSTEM: Bonus for killing stelo.MirrorMicro 1.1: 12
SYSTEM: sheldor.micro.EpeeistMicro 1.7.0 wins the round.
Sheldor‎17:56, 8 January 2013
 

Looks, like here you have a problem: [(int)enemyDistance / 200] Distance may be more than 800 units (sqrt(800*800 + 600*600)=1000), but you give for this dimension only 4 elements It's another problem, but i cannot find out other problems by codereview and it's too late to debugging it, sorry

Jdev‎18:29, 8 January 2013

I'm sorry, I don't understand what you're saying. On an 800 by 600 field, the maximum possible distance would be 764, 764 divided by 200 would be 3.82, and 3.82 cast to an int would be 3. Besides, Thorn and a few other micros use the same distance segment code and don't have a problem.

Sheldor‎19:20, 8 January 2013
 

On an 800x600 field, the distance between opposite corners is 1000 (forming a 3/4/5 right triangle). So I think you do need another distance segment, but I haven't looked through your code/logs enough to be sure that's the problem above.

Voidious‎19:44, 8 January 2013
 

Thanks! You both nailed it. In older versions I initialized the dimension to 7, I forgot to mention I had reduced it to 4 to save a byte. The reason it was losing to mirror bots was because they were in the opposite corner exactly the same time EM was.

I will give you both a mention in the credits.

Sheldor‎20:23, 8 January 2013
 

Do you use any version control system (git, mercurial, etc)? I recommend to use it. It will facilitate for such bugs detection.

Jdev‎05:16, 9 January 2013

No. How do they work?

Sheldor‎15:57, 9 January 2013
 

I use git for my projects. But I'm sorry to say they don't really save you from silly bugs. =)

Voidious‎16:35, 9 January 2013
 

They don't save from bugs, but they show all changes between versions:) VCS it's something like source code storage with support of files versions. In case of git or mercurial you can use only local repositories or link them with remote repositories in free clouds (github or bitbucket). In case of local repository, main command is commit - this command pushes current state of yours files to storage and marks it with some identifier and you can always get exact state of all files in repository with identifier. Also vcs supports versioning and if you commit files before every release, you can see all differences in code between releases. It's very useful for robocoding. Read this books: http://git-scm.com/book/ or http://hgbook.red-bean.com/read/. It's a "holywar" choise between git and mercurial, but they are pretty equal and usage of any of them is much better then usage nothing:) I use git at home and mercurial at work and cannot give suggestion - they both cool and you need to try them both to choose for yourself

Also i recommend to use some build system (i use gradle and i for sure ready to suggest to choose it) and enforce semantic versioning by them. You can see example in my new bot repository: https://github.com/aleksey-zhidkov/Violet/blob/master/build.gradle. In Violet i use follow versions:

  • Build: <major>.<minor>.<branch>.<build number> - used to for testing (in hand mode or in batch mode in Distributed_Robocode (some kind of analog of RoboRunner with remote computing support), but each batch test enforces build number increase)
  • Release: <major>.<minor> - user for releases

So my development process is:

  1. Do some changes
  2. Build them
  3. Run robocode to see them
  4. If bugs exists, then go to 1
  5. "Install" Violet - commit changes, copy build to "builds" dir and batch battles executor robots dir and incerment build number
  6. If batch testing shows APS gain, then release it: commit changes, copy build "releases" dir, increment minor version and reset build number and push version to github

By the way, robocoders, lets make page with out development processes for noobies:)

Jdev‎05:53, 10 January 2013

I use Maven as build system. Never tried gradle.

And I´m not currently using any version control system, but I might try git. There was one episode in the past when I lost hours trying to figure out why my bot score dropped about 30% in challenges. I could have found the bug in minutes with version control.

MN‎13:25, 10 January 2013

We are use ant and maven at work for enterprise project and gradual migrate to gradle, so i definitely can suggest to try gradle^) Especially because you can easy generate gradle project from maven project: http://gradle.org/docs/current/userguide/bootstrap_plugin.html

Jdev‎14:40, 10 January 2013
 
 
 
 
 

Wow!

Very impressive little micro you have here. I've always wondered what it was that PEZ got right with Aristocles, because it is almost impossible to beat with conventional methods. In fact, if you examine its scores, it loses to all of the rambots because (IIRC) it never fires with 3 power bullets if the enemy is close. I'm fairly sure that it would rank significantly higher if that was fixed. Interestingly, your nano Sabreur beats Aristocles fairly well...

Skilgannon‎22:34, 14 December 2012

Thanks!

Aristocles does fire full power at close range, it loses to ram bots because it doesn't try to run away, it just sits there and takes ram damage. Also, I don't think fixing anti-ram would have a significant impact on its score. Look at RaikoMicro, it only fires power 2s and gets destroyed by ram bots, yet it is seven places ahead!

Sheldor‎00:15, 15 December 2012

In PL ranking, which favors generalist bots more, they flip positions and Aristocles is ahead.

MN‎13:34, 10 January 2013
 

I think one reason why he's so good at hitting Random Movement is the number of bins. I ran many tests, and 25 seems to be the best against RM.

Sheldor‎16:10, 8 January 2013
 
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