Black Phoenix’s Brain Blog

Luckily MSVC6, which was used to compile GTA2 (at least originally) leaves a lot of interesting stuff behind, here is the approximate source tree recovered from strings in executable file (it includes some of files, far from entire list):

• C:\gbh\coop101release\car.cpp
  Car respraying. Trailer handling (it has some strings connected to putting cars on trailers, and handling trailers)




• C:\gbh\coop101release\carinfo.cpp




• C:\gbh\coop101release\char.cpp
  References to police peds and normal peds visible on screen (it might have been managing different types of pedestrians, and possibly storing their stats & parameters)




• C:\gbh\coop101release\collide.cpp
  Collision detection (generic)




• C:\gbh\coop101release\display.cpp




• C:\gbh\coop101release\diutil.cpp
  DirectInput. Joystick handling.




• C:\gbh\coop101release\door.cpp
  Door code (map doors which are placed by script, like garage doors).




• C:\gbh\coop101release\File.cpp
  File IO, reader for chunked files




• C:\gbh\coop101release\frontend2.cpp
  Frontend code (references to TGA graphic files)
  Plays intro movie. Seems to be loading car handling data.




• C:\gbh\coop101release\game.cpp
  Counts some bonuses (accuracy bonus, something else?).
  Tracks number of spawned cars, mission cars, etc. Must also track game money, lives, etc




• C:\gbh\coop101release\input.cpp
  Keyboard input, remapping input
  References chunks KBIT and KIDX (these do not seem to be used in any of resource files)




• C:\gbh\coop101release\kanji.cpp
  References to chunk KANJ, seeming from file data\kanji.dat.
  It seems that this file is chunked file, and someone suggested it exists only in PS1 version. Time to get PS1 version somewhere…




• C:\gbh\coop101release\keybrd.cpp
  Keyboard mapping, loads info from data\keyboard\eng_kb.cfg file (or any other one, depends on language)




• C:\gbh\coop101release\main.cpp
  Has reference to ExitGameCallback function or routine
  Seems to be checking for multiplayer compatibility (on start), references these messages:

  Player %s: Car handling file 'nyc.gci' is different
  Player %s: Game file 'GTA2.EXE' is different
  Player %s: Script file '%s' is different
  Player %s: Style file '%s' is different
  Player %s: Level file '%s' is different
  Player %s: Debug flags are different
  Player %s: Language version is different
  




• C:\gbh\coop101release\map.cpp
  Loads map data from GMP map.
  References chunks RGEN LGHT ANIM MOBJ ZONE DMAP
  As you can see, it only loads DMAP compressed chunk, although map files contain CMAP and UMAP maps too. It also skips some unknown chunks, possibly left by GTA2 map editor for storing temp stuff like current camera view position (in editor).




• C:\gbh\coop101release\medical.cpp




• C:\gbh\coop101release\Memory.cpp
  Memory manager, also manages textures




• C:\gbh\coop101release\miss2.cpp
  MISS2 virtual machine. References strings:

  svmiss
  svscore
  svdone
  kfstart
  kffail
  kfpass




• C:\gbh\coop101release\movie2.cpp
  Runs intro movie (from BIK file)




• C:\gbh\coop101release\multip.cpp
  Contains some dialog box, seemingly the dialog you see when you try to start new MP game. Sets server parameters (time limit, game speed, police, game type, map). Does not allow connecting if you dont have target map.




• C:\gbh\coop101release\NetworkX.cpp




• C:\gbh\coop101release\object.cpp




• C:\gbh\coop101release\park.cpp




• C:\gbh\coop101release\particle.cpp




• C:\gbh\coop101release\physics.cpp
  Physics handler/physics engine for cars (and maybe bullets)




• C:\gbh\coop101release\player.cpp
  Refrences these player death reasons: shocked nicked fried wasted (”nicked” doesn’t seem to be used anywhere in-game though)




• C:\gbh\coop101release\plydat.cpp
  These are default player names:

  	ALISDAIR
  	BILLY
  	BRIAN
  	COLIN
  	IAIN
  	IAN
  	KEITH
  	MARTIN
  	STEPHEN
  	WILLIAM
  

  There are also references to these default highscore names:

  	JACKSON
  	IMOGEN
  	HECTOR
  	GRAEME
  	FRANK
  	ERIC
  	DAVE
  	COLIN
  	BRIAN
  	ALAN
  	MUCHCASH <-- cheat code for a lot of money
  




• C:\gbh\coop101release\pubtrans.cpp
  Public transportation. References some navigation paths (for trains?)




• C:\gbh\coop101release\registry.cpp
  Registry handling. References some registry keys (and also debug flags which are stored in registry)




• C:\gbh\coop101release\sprite.cpp




• C:\gbh\coop101release\style.cpp
  Loads STY files. Has reference to following chunks:
  RECY (car recycling info)
  SPEC (unknown chunk)
  OVLY (unknown chunk, possible overlays data, whatever that would be. It might be from PS1 version, need to get those style files and check…)
  PSXT (PS1 tile graphics, not present in PC version style files)
  CARI (car info)
  DELX (delta index)
  DELS (delta store/data)
  TILE (tile graphics)
  SPRG (sprite graphics)
  PPAL (physical palettes)
  PALX (palette index)
  OBJI (map object info)
  SPRX (sprite index)
  FONB (font bases)
  SPRB (sprite bases)
  PALB (palette bases)
  GBST (style file header)




• C:\gbh\coop101release\taxi.cpp
  Taxi handling. References these briefing messages (message references are not present in rockstar.com version): 8013 8012 8011
  Seems to be ability to drive pedestrians around in taxi, cut from final game. These are the briefings (they do not seem to make much sense):
  [8011] z!I’ll take care of him. You can go now!
[8012] z!What the hell is going on?! He wasn’t supposed to kill him! Assassinate the real traitor!
[8013] YOU’RE DA IRON MAN!




• C:\gbh\coop101release\text.cpp
  Loads GXT files (text/briefing/messages data).
  References these chunks: TDAT TKEY GBL%c (last one is different for language picked)




• C:\gbh\coop101release\tileanim.cpp
  Handles tile animations




• C:\gbh\coop101release\user.cpp




• C:\gbh\coop101release\video.cpp
  Video properties (sets video gamma, something else)




• C:\gbh\coop101release\weapon.cpp




• C:\gbh\coop101release\winmain.cpp
  Wrapper for WINAPI functions. References to mutexes COOP MUTEX and GBH MUTEX