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Active: 1550 users

BWAPI, and an inside look into StarCraft's code

Forum Index > BW General
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1 2 Next All
Sonko
Profile Joined February 2019
154 Posts
Last Edited: 2019-11-14 14:46:20
October 18 2019 08:40 GMT
#1
Hi dear people of TL forums,

A while ago, I started working on Brood War bot development. During this endeavor, I decided to write a book about it - and one of the chapters of this will be dissecting the code of StarCraft itself. This is quite an undertaking, but I'm making progress with it. Don't let the title "Brood War API" fool you, if you're a gamer, you might still find it interesting!

Here are the posts I have so far. I plan to post updates in this forum in the future, as I publish the episodes:
(Last update: 2019-11-14)

Brood War API – The Comprehensive Guide (of time and space)
Brood War API – The Comprehensive Guide – Distances, high ground, and unit behavior
Brood War API – The Comprehensive Guide – Unit movement, and worker behavior
Brood War API – The Comprehensive Guide: Creating buildings, and everything about the creep
Brood War API – The Comprehensive Guide: Buildings, and placement
Brood War API – The Comprehensive Guide: Movement modifiers, and Terran units
Brood War API – The Comprehensive Guide: Terran units continued, and some Zerg ones


Feel free to ask questions, point out mistakes/typos! I have a pretty good plan how I want to proceed with the topics within the book, and I'd like to publish updates at least weekly.

Enjoy!
Sonko

A site about brood war AI: www.makingcomputerdothings.com
Turbovolver
Profile Blog Joined January 2009
Australia2404 Posts
October 18 2019 11:36 GMT
#2
Nice work! I had a skim through it and even that taught me some things. A question though, what is the deal with detectors and moving? I wasn't aware that moving had any effect on a detector's ability to detect? Or is this just about its "detection region" only being updated every so often, ala sight?
The original Bogus fan.
WombaT
Profile Blog Joined May 2010
Northern Ireland26853 Posts
October 18 2019 11:42 GMT
#3
Ah great, been looking for some light reading material!

Joking aside this is pretty cool, look forward to having a proper look later today.
'You'll always be the cuddly marsupial of my heart, despite the inherent flaws of your ancestry' - Squat
Sonko
Profile Joined February 2019
154 Posts
October 18 2019 11:51 GMT
#4
Thanks for the feedback!
. A question though, what is the deal with detectors and moving? I wasn't aware that moving had any effect on a detector's ability to detect?


I don't really get your question here Can you maybe quote the part that implies that?
A site about brood war AI: www.makingcomputerdothings.com
Turbovolver
Profile Blog Joined January 2009
Australia2404 Posts
Last Edited: 2019-10-18 13:05:20
October 18 2019 13:05 GMT
#5
[quote=Sonko]Detector: If the unit is immobile, it can detect cloaked units within its sight range. If it’ mobile, it’s not constant. Blinded, incomplete, or disabled units cannot detect, and neither do hallucinations.[/quote]
This was the text that I wasn't sure about. "If it's mobile, it's not constant".

I thought that meant moving units versus stopped units, but I'm guessing the distinction is between say, a missile turret and a science vessel? And you just mean that the region detected is not constant for a moving unit?

(which of course makes perfect sense)
The original Bogus fan.
Sonko
Profile Joined February 2019
154 Posts
October 18 2019 13:11 GMT
#6
Yes, you're correct Maybe I'll rephrase that to be more clear.
A site about brood war AI: www.makingcomputerdothings.com
tankgirl
Profile Blog Joined May 2016
Canada472 Posts
October 18 2019 21:21 GMT
#7
How did you get the SC source code?
https://tl.net/forum/brood-war/627255-progamer-settings
TL+ Member
Sonko
Profile Joined February 2019
154 Posts
October 18 2019 21:46 GMT
#8
The short answer is I didn't I use openBW, a decompiled source - see the first article
A site about brood war AI: www.makingcomputerdothings.com
TelecoM
Profile Blog Joined January 2010
United States10722 Posts
October 18 2019 23:25 GMT
#9
Wow this is really interesting stuff... thanks for sharing! The coding is crazy lol
AKA: TelecoM[WHITE] Protoss fighting
Sonko
Profile Joined February 2019
154 Posts
October 19 2019 10:09 GMT
#10
And the next part is here: About buildings, and unit placement. This has been one of the hardest to research so far. Enjoy, and don't hesitate to ask if anything is not clear!
https://makingcomputerdothings.com/brood-war-api-the-comprehensive-guide-buildings-and-placement/
A site about brood war AI: www.makingcomputerdothings.com
Freakling
Profile Joined October 2012
Germany1533 Posts
Last Edited: 2019-10-19 12:55:36
October 19 2019 12:41 GMT
#11
Hero defiler (Unclean One) also has a different collision box than a regular Defiler.

For presenting tile/subtile grids you should better use screenshots from SCMDraft with walkability flag overlay.

People less versed in the OpenBW code, or coding in general, would probably like it if you would explain variable types and other definitions a bit.

The switching into additional terrain flags (cover, terrain level) also comes a bit sudden. You probably should write a more elaborate introduction to terrain flags first (you brush on all of it a bit, but I don't think it is very comprendable without prior knowledge).

The relationship between walkability and buildability is actually… a bit complicated… (Partially) unwalkable, but buildable tiles have some very interesting and useful effects.
PVJ
Profile Blog Joined July 2012
Hungary5221 Posts
October 21 2019 00:03 GMT
#12
Very interesting keep up the good work!
The heart's eternal vow
TelecoM
Profile Blog Joined January 2010
United States10722 Posts
October 21 2019 02:53 GMT
#13
Does APM / speed of hand / latency / ping affect how units work / attack / move or is that all in my head?
AKA: TelecoM[WHITE] Protoss fighting
Sonko
Profile Joined February 2019
154 Posts
October 21 2019 09:03 GMT
#14
"Does APM / speed of hand / latency / ping affect how units work / attack / move or is that all in my head?"

Latency is something you have to compensate for at some point, if you develop an AI. Other than that, they do, but not in the code
A site about brood war AI: www.makingcomputerdothings.com
Sonko
Profile Joined February 2019
154 Posts
October 21 2019 11:48 GMT
#15
And I missed one post:
Creating buildings, and everything about the creep - nipicking/proofreading/questioning of the things are always welcome!
A site about brood war AI: www.makingcomputerdothings.com
Akio
Profile Blog Joined January 2019
Finland1838 Posts
October 21 2019 12:51 GMT
#16
I know close to nothing about coding but this is super interesting! Thanks for sharing
Mine gas, build tanks.
Sonko
Profile Joined February 2019
154 Posts
October 22 2019 21:33 GMT
#17
You're welcome Also, if you want to get into programming, this is a great project. Many students have walked that path before
A site about brood war AI: www.makingcomputerdothings.com
Sonko
Profile Joined February 2019
154 Posts
October 24 2019 09:42 GMT
#18
Thanks everyone for the feedback! I corrected a few minor things, and rephrased stuff. I plan to release the next article soon!
A site about brood war AI: www.makingcomputerdothings.com
[UoN]Sentinel
Profile Blog Joined November 2009
United States11320 Posts
October 26 2019 03:44 GMT
#19
Really enjoyed your series on molesting crabs and such, looking forward to your newest deep dive!
Нас зовет дух отцов, память старых бойцов, дух Москвы и твердыня Полтавы
Sonko
Profile Joined February 2019
154 Posts
October 27 2019 09:23 GMT
#20
And the next part is here. It's a little all over the place, I extended and revised some of the earlier parts, and added stuff here. Anyway, it's about movement modifiers, and code behind Terran units.

Read it here!
A site about brood war AI: www.makingcomputerdothings.com
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