New GTA2 Script Compiler Preview v0.1

B-$hep · **Posted:** Mon Jul 02, 2012 2:30 am

Hi.

I want you to show the new GTA2 Script Compiler that me and T.M working on currently.
Im very thankful to you T.M for your invaluable help and support and sources.

It is very simple atm but it compiles, checks for errors, etc and generates valid .scr file.

I have attached the 7zip, it has pretty good ReadMe.txt included.
Please read it, before asking or using.

Please test it, try to find bugs etc...
Any feedback on this is welcome.

Very short text, but it's 5:30 AM here, and i must go to sleep now.
See ya guys.

Sektor · **Posted:** Mon Jul 02, 2012 3:41 am

Suggestions:

The green comments on grey background are very hard to read. MisIde2 should remember window state. It doesn't detect all syntax errors.

Dream:

One day in the far future we will have an open source compiler that supports everything the official compiler supports only without the bugs or limitations.

B-$hep · **Posted:** Mon Jul 02, 2012 9:16 am

Thanks for reply. I know, the IDE is limited, because it was not meant to be full replacement atm.
The MisPad ide is better for it. Current IDE was just to show the thing.

Yes, compiler will open source, i use parts from T.M scr decompiler, but currently it's pointless to release it, because it's updated too often. I don't have time to update the source here, after each modification. After some specific achievement, i could upload it and then again after some major update, upload latest version.

T.M. · **Posted:** Mon Jul 02, 2012 11:30 am

Maybe you should mention in the first post, that i am also working on this thing with you? Or am i? I think i helped you a lot in the PM's we went through, plus i gave lots of ideas and wrote bunch of c++ code for you and fixed some bugs... wrote the scr document for (mainly) you, etc. Anyways, i will help on this once i get your sources, probably fix some stuff again.

Btw, before you do anything bigger, may i look at the code to see if its good to go for larger set of commands, so you/we dont have to waste hours to rewrite 5000 lines of code laterwards. Just PM it to me if you dont want to show it to everyone yet.

elypter · **Joined:** Sat Dec 26, 2009 11:53 pm **Posts:** 933

this is really a great project. i'm looking forward to see more.
... maybe even new script commands ... vike?

B-$hep · **Posted:** Mon Jul 02, 2012 8:29 pm

T.M. wrote:

...

Yes i know my friend. I apologize, but as i said, i was very very tired when i uploaded this stuff.
I was awake whole night and i wasn't even thinking clearly. I forgot to mention many things, not only you but about compiler also. But anyway, i will create a source pack for you and will send PM soon.

I fixed my mistake.

Elypter or anybody, who downloaded the 7zip pack here:

1) Did you tried to compile the script?
2) Did you executed it with GTA2?
3) Did it work for you? I mean IDE and GTA2MISS.exe?
4) Any errors (error messages anywhere)?

I forgot to mention that this script was designed for ste.gmp map, that ships with GTA2.
It has a parking lot near church, and the cars and bus supposed to be there and parked.

I use GTA2 Power Manager to quickly test maps and script. It makes it very easy and quick. I love it.
Just make sure to check "Skip Frontend"

Vike the Hube · **Joined:** Sun Feb 28, 2010 10:34 pm **Posts:** 129

elypter wrote:

this is really a great project. i'm looking forward to see more.
... maybe even new script commands ... vike?

I endorse this message.

Sektor · **Posted:** Wed Jul 04, 2012 10:49 am

Ishani's Power Manager won't work with Vike's GTA2 Manager/patch but you can get the same debug tab in any GTA2 Manager just by importing a registry key or running GH.

Vike the Hube · **Joined:** Sun Feb 28, 2010 10:34 pm **Posts:** 129

Also B-Shep you could use some source control software like subversion or git. Host it on google code and use something like TortoiseSVN to do your commits. But whatever works for you of course

I'd rather you work on it than get too bogged down in admin.

B-$hep · **Posted:** Tue Mar 12, 2013 9:40 pm

Just want you to know that i still work on this thing. It's going very nicely.
I take it with small steps. And i want this thing to be binary compatible with original scr files except of course the junk data at the end of the .scr files. Everything else must be exactly same.
Otherwise it will crash even without that, GTA2 .scripting is unstable enough.
So far i have pretty much worked on "interesting" things like, cars, players, generators things.

So for ex script like this compiles and works fine and is 99% match with miss2 binaries, except junk data, because it's not needed:

Syntax: [ Download ] [ Hide ]

Using GTA2 Script Syntax Highlighting

/*          VENERIC ISLE  

      created by Jozodezokokotar

          ICQ: 319-945-345

      DECLARE PLAYERS & VARIABLES             */
PLAYER_PED PLAYER_1 =(115.0 , 128.5 , 3.0)0180
PLAYER_PED PLAYER_2 =(115.0 , 113.5 , 3.0)20
PLAYER_PED PLAYER_3 =(122.0 , 121.0 , 3.0)4270
PLAYER_PED PLAYER_4 =(108.0 , 121.0 , 3.0)390
PLAYER_PED PLAYER_5 =(124.6 , 110.5 , 4.0)1390
PLAYER_PED PLAYER_6 =(104.0 , 132.0 , 4.0)12315

CHAR_DATA pl1_helfer
CHAR_DATA pl2_helfer
CHAR_DATA pl3_helfer
CHAR_DATA pl4_helfer
CHAR_DATA pl5_helfer
CHAR_DATA pl6_helfer

DECLARE_POLICELEVEL(1)
DECLARE_FINISH_SCORE(0)
DECLARE_TOTAL_MISSIONS(0)
DECLARE_TOTAL_SECRETS(0)

//    DECLARE CARS
PARKED_CAR_DATA swatvan1 =(116.9 , 131.8 , 3.0)-1315SWATVAN
PARKED_CAR_DATA miara =(115.2 , 131.6 , 3.0)945MIURA
PARKED_CAR_DATA meteor =(114.1 , 131.6 , 3.0)1045STRATOSB
PARKED_CAR_DATA michelli =(112.8 , 131.6 , 3.0)3445T2000GT
PARKED_CAR_DATA swatvan2 =(117.1 , 110.1 , 3.0)-1225SWATVAN
PARKED_CAR_DATA stinger =(115.2 , 110.3 , 3.0)30135STINGRAY
PARKED_CAR_DATA wellard =(114.1 , 110.3 , 3.0)13135ALLARD
PARKED_CAR_DATA atype =(112.8 , 110.3 , 3.0)34135RTYPE
PARKED_CAR_DATA furore =(122.6 , 122.6 , 3.0)33135ZCX5
PARKED_CAR_DATA ztype =(107.4 , 119.4 , 3.0)11315VTYPE
PARKED_CAR_DATA rumbler =(106.0 , 123.5 , 3.0)21260WBTWIN
PARKED_CAR_DATA jeffry =(124.5 , 119.2 , 3.0)545JEFFREY
PARKED_CAR_DATA garbaget =(90.8 , 121.5 , 3.0)2945GTRUCK
PARKED_CAR_DATAapc=(86.0 , 119.0 , 3.0)-1170APC
PARKED_CAR_DATA blackvan =(120.5 , 141.7 , 3.0)2315VAN
PARKED_CAR_DATA karmabus =(123.1 , 98.0 , 3.0)-1225KRSNABUS
PARKED_CAR_DATA copcar1 =(107.5 , 139.4 , 3.0)-1180COPCAR
PARKED_CAR_DATA copcar2 =(122.5 , 102.6 , 3.0)-10COPCAR
PARKED_CAR_DATA parked_trailer1 =(124.1 , 142.0 , 3.0)16315truktrns
PARKED_CAR_DATA parked_trailer2 =(91.0 , 118.0 , 3.0)2145truktrns
PARKED_CAR_DATA parked_trailer3 =(137.9 , 117.0 , 3.0)2945truktrns
PARKED_CAR_DATA truckcabsx =(125.5 , 95.6 , 3.0)32315TRUKCAB2
PARKED_CAR_DATA armyjeep =(118.0 , 142.0 , 3.0)-10GUNJEEP
PARKED_CAR_DATA oiljeep =(135.8 , 116.8 , 3.0)-145JEEP
PARKED_CAR_DATA fbicar =(90.5 , 119.5 , 3.0)-145EDSELFBI
PARKED_CAR_DATA firetruck1 =(108.5 , 139.7 , 3.0)-1180FIRETRUK
PARKED_CAR_DATA firetruck2 =(121.5 , 102.3 , 3.0)-10FIRETRUK
PARKED_CAR_DATA dummy1 =(105.0 , 106.5 , 3.0)-145JEEP
PARKED_CAR_DATA dummy2 =(96.8 , 120.9 , 3.0)-190SWATVAN
PARKED_CAR_DATA dummy3 =(133.0 , 121.0 , 3.0)-1270APC
PARKED_CAR_DATA car_pl1 =(112.2 , 129.2 , 3.0)31135GT24640
PARKED_CAR_DATA car_pl2 =(118.6 , 113.6 , 3.0)28315GT24640
PARKED_CAR_DATA car_pl3 =(124.6 , 120.5 , 3.0)2090GT24640
PARKED_CAR_DATA car_pl4 =(105.4 , 120.5 , 3.0)35270GT24640
PARKED_CAR_DATA car_pl5 =(127.5 , 111.5 , 3.0)2745GT24640
PARKED_CAR_DATA car_pl6 =(104.8 , 134.5 , 3.0)3480GT24640

//    DECLARE WEAPONS
GENERATOR machine_gun1 =(113.0 , 126.0 , 3.0)0COLLECT_0120080010
GENERATOR machine_gun2 =(117.0 , 116.0 , 3.0)0COLLECT_0120080010
GENERATOR machine_gun3 =(134.5 , 126.6 , 4.0)0COLLECT_0160080015
GENERATOR machine_gun4 =(121.0 , 127.0 , 4.0)0COLLECT_0120080010
GENERATOR machine_gun5 =(104.0 , 111.2 , 4.0)0COLLECT_0120080010
GENERATOR silenced_machine1 =(120.0 , 123.0 , 3.0)0COLLECT_0920080010
GENERATOR silenced_machine2 =(110.0 , 119.0 , 3.0)0COLLECT_0920080010
GENERATOR silenced_machine3 =(104.6 , 133.6 , 4.0)0COLLECT_0960080015
GENERATOR silenced_machine4 =(119.5 , 102.5 , 3.0)0COLLECT_0960080015
GENERATOR silenced_machine5 =(95.5 , 115.4 , 4.0)0COLLECT_0960080015
GENERATOR shotgun1 =(117.0 , 126.0 , 3.0)0COLLECT_0620080016
GENERATOR shotgun2 =(120.0 , 119.0 , 3.0)0COLLECT_0620080016
GENERATOR shotgun3 =(113.0 , 116.0 , 3.0)0COLLECT_0620080016
GENERATOR shotgun4 =(110.0 , 123.0 , 3.0)0COLLECT_0620080016
GENERATOR dual_pistol1 =(126.0 , 132.4 , 4.0)0COLLECT_1020080032
GENERATOR dual_pistol2 =(126.0 , 109.0 , 4.0)0COLLECT_1020080032
GENERATOR dual_pistol3 =(104.0 , 109.8 , 4.0)0COLLECT_1020080032
GENERATOR dual_pistol4 =(109.0 , 127.0 , 4.0)0COLLECT_1020080032
GENERATOR flamethrower =(109.5 , 111.5 , 5.0)0COLLECT_08120036005
GENERATORelectro_gun=(120.5 , 130.5 , 5.0)0COLLECT_03120036005
GENERATOR rocket_launcher1 =(124.5 , 115.5 , 5.0)0COLLECT_02120036002
GENERATOR rocket_launcher2 =(105.5 , 126.5 , 5.0)0COLLECT_02120036002
GENERATOR rocket_launcher3 =(120.6 , 92.5 , 3.0)0COLLECT_02120036002
GENERATOR invisibility =(115.0 , 121.0 , 3.0)0COLLECT_3998009900
GENERATOR pistol1 =(102.4 , 131.4 , 4.0)0COLLECT_0020080099
GENERATOR pistol2 =(126.0 , 111.0 , 4.0)0COLLECT_0020080099
GENERATOR molotov1 =(102.5 , 116.5 , 4.0)0COLLECT_046008006
GENERATOR molotov2 =(134.4 , 123.6 , 3.0)0COLLECT_046008006
GENERATOR molotov3 =(104.0 , 139.0 , 3.0)0COLLECT_046008006
GENERATOR grenade1 =(117.5 , 102.5 , 3.0)0COLLECT_056008008
GENERATOR grenade2 =(126.8 , 122.2 , 3.0)0COLLECT_056008008
GENERATOR grenade3 =(95.5 , 118.5 , 3.0)0COLLECT_056008008
GENERATOR armour1 =(104.0 , 110.5 , 4.0)0COLLECT_316001200
GENERATOR armour2 =(126.0 , 131.6 , 4.0)0COLLECT_316001200
GENERATOR health1 =(120.5 , 111.5 , 5.0)0COLLECT_306001200
GENERATOR health2 =(109.5 , 130.5 , 5.0)0COLLECT_306001200
GENERATOR double_damage =(126.0 , 110.0 , 4.0)0COLLECT_3564007200
GENERATOR double_fire_rate =(102.4 , 133.6 , 4.0)0COLLECT_3664007200
GENERATOR cop_bribe =(100.0 , 106.0 , 3.0)0COLLECT_33600800
GENERATOR gang_powerup =(130.0 , 136.0 , 3.0)0COLLECT_4038004200
GENERATOR electrofingers =(100.0 , 136.0 , 3.0)0COLLECT_376001200
GENERATORcar_oil=(105.5 , 115.5 , 5.0)0COLLECT_16380042005
GENERATORcar_bomb=(130.0 , 106.0 , 3.0)0COLLECT_1538004200
GENERATOR instant_bomb =(124.5 , 126.5 , 5.0)0COLLECT_2338004200

LEVELSTART
//    WEAPONS RESPAWN pt.2
SWITCH_GENERATOR( flamethrower , ON)
SWITCH_GENERATOR(electro_gun , ON)
SWITCH_GENERATOR( rocket_launcher1 , ON)
SWITCH_GENERATOR( rocket_launcher2 , ON)
SWITCH_GENERATOR( rocket_launcher3 , ON)
SWITCH_GENERATOR( invisibility , ON)
SWITCH_GENERATOR( molotov1 , ON)
SWITCH_GENERATOR( molotov2 , ON)
SWITCH_GENERATOR( molotov3 , ON)
SWITCH_GENERATOR( grenade1 , ON)
SWITCH_GENERATOR( grenade2 , ON)
SWITCH_GENERATOR( grenade3 , ON)
SWITCH_GENERATOR( armour1 , ON)
SWITCH_GENERATOR( armour2 , ON)
SWITCH_GENERATOR( health1 , ON)
SWITCH_GENERATOR( health2 , ON)
SWITCH_GENERATOR( cop_bribe , ON)
SWITCH_GENERATOR( gang_powerup , ON)
SWITCH_GENERATOR( electrofingers , ON)
SWITCH_GENERATOR(car_oil , ON)
SWITCH_GENERATOR(car_bomb , ON)
SWITCH_GENERATOR( instant_bomb , ON)
LEVELEND
Parsed in 0.057 seconds,  using GeSHi 1.0.8.10

I really want to try out IF..THEN & WHILE's soon.
It would be very exciting.

REQUEST
If anybody here has bunch of scripts (.mis files) on your hard drive, any script, it doesn't matter short or big, please make a pack with them and upload to somewhere.
I need example .mis files as much as possible. To test different kinds of syntax and commands.
It would help alot.

So far i got bunch of them from Elypter packs, but i want more.
Currently 263 .mis files in my C:\Scripts folder.
I need more

T.M. · **Posted:** Wed Mar 13, 2013 7:45 am

B-$hep wrote:

Currently 263 .mis files in my C:\Scripts folder.
I need more

I dont think you need more files. Just time and some logical thinking how to use the IF/WHILE stuff. There are not many tricks to use them, except the tricks to avoid compiler bugs in current compiler. For example ELSE command doesnt work at all, or was it just in nested IF's? Dunno anymore.

You could use my stuff i used to build my decompiler:

Attachment:

decompiler_mis_tests.7z [14.93 KiB]
Downloaded 5 times

Not sure if there is every command, i think i overwrote some files while testing in huge rush the commands.

Note: not all those files are playable, they were used to test how the compiler compiles them, if it compiles them at all. For example there are some negative coordinate values i think. But thats still useful since you have to add error checking for every parameter. You need to check which ranges each parameter allows to be executed in GTA2 without crash, and then allow that in the compiler. Some of the parameters i used have -1 values, which is not always treated as negative; the compiler probably converts it to unsigned integer in some cases. I think there was some conversion in the CHANGE_BLOCK commands etc... hard to remember. It will be a lot of testing though.

When are you gonna release the source? C++?
(i dont think you will finish it by yourself, nor do i think i have time for that either, but who knows, and there are other people willing to help too, i think).

Here are some things to consider, maybe helps thinking how to do the IF's:
viewtopic.php?p=5039#p5039 (i dont mean you have to change the syntax!)
viewtopic.php?p=5123#p5123
viewtopic.php?p=6384#p6384

Some documentation made by me:
http://epicgta2.omnitude.net/scrdoc/scr_strings.html

B-$hep · **Posted:** Wed Mar 13, 2013 10:16 am

Hi T.M.
Thanks for the scripts.
Yes, i have looked into if-then's some time ago, just to see how they are done / used etc.
Just small sneak peak to this thing.

About finishing the compiler i want to tell you one thing.
It will be like with decompiler, i slowly worked on it, it was fun and then you came and basically finished the job with "1 day". But i asked you to not to code it and finish it. Even you said you don't have time. But you did it. OK what's done that's done. Im not mad or anything. I know there are better coders, like you. I wanted to try to finish the if-thens, while in your decompiler, but the source is not easy to understand. If i figure them out then i can only give you the stuff i figured out and you must add this to decompiler by yourself.

And i think same will be with compiler. You will make it in 1-2 days maybe and that's it.
But im bored atm and it's interesting to code and fun to run GTA2 to see if it crashes or something or doing a binary compare on .scr files after compile, etc.

If you will finish it withing few days, i don't have anything to do again.
Don't understand me wrong, im not mad at you because of this nor i will be, but im just telling you how it will go.

And im still very very thankful to your help and sources you gave out.
Of course i will give out the source fully, but i don't know when.

Im just afraid i will be out of job again.

EDIT:
You really should use more #ifdef #endif in your headers to avoid multiple declarations errors.
Or just #pragma once
It's very good practice. I got a bunch of errors from VC++ and wondered why. And then i discovered that you don't have these commands at the beginning of the header files.
I added and errors went away.
I know that scr decompiler dll compiles but when using stuff in other projects you (users) will have problems.

Jones · **Joined:** Wed Aug 08, 2012 9:25 pm **Posts:** 41

I'm also interested in writing the compiler or at least have a glance how you have done it B-$hep, please release it as source

I don't know how you can circumvent your problem of attractive problems which been solved by others, but aren't there enough for everyone? I don't think someone here can write a fully fledged compiler without bugs and new features alone, even if someone can, not in the same time as more people could do. We still have no full map editor alternative and Vike is surely happy if someone get into GTA 2 reverse engineering. In my opinion it also wouldn't be fatal if we have two different compilers, you can still exchange ideas and your findings

B-$hep · **Posted:** Wed Mar 13, 2013 11:14 am

99% (ok almost i think) of compiling is done for me. I have to just tell "him" (the engine) what to expect as input.
Rest of the parsing is done by him. I just take the values / variables from commands and process that.
I know how difficult is to write complete parser for any language, specially the recursive descent parsers. Fortunately there are good engines to simplify this alot. And im using one of them. It's the best out there.

If we talk about Vike, i don't know how he is so good at fixing stuff in GTA2 and adding features.
Sometimes i think he got the sources of GTA2 :D

T.M. · **Posted:** Wed Mar 13, 2013 11:18 am

B-$hep wrote:

About finishing the compiler i want to tell you one thing.
It will be like with decompiler, i slowly worked on it, it was fun and then you came and basically finished the job with "1 day". But i asked you to not to code it and finish it. Even you said you don't have time. But you did it.

Yeah. If you shared the code on the first place, i probably wouldnt have finished it myself. You know, when you tell a kid "no", he wants it even more. ;-)

Currently i really dont have any time, so no worries.

B-$hep wrote:

I wanted to try to finish the if-thens, while in your decompiler, but the source is not easy to understand.

You probably have to rewrite some parts of the code anyways. It doesnt get linear anymore when the If's and While's are added. Currently it just outputs each command for each line. if/whiles need more trickier formatting and parsing logic.

Basically the decompiler just reads one command at a time, parses the values for each parameter, executes some custom functions for some of them (to keep track of stuff), and then outputs the line. I have added a lot of comments there, so it should be possible to understand the logic. If you read it all and still dont understand, i can explain more.

B-$hep wrote:

If i figure them out then i can only give you the stuff i figured out and you must add this to decompiler by yourself.

Its best if you just make own decompiler from scratch, and then just parse the if/whiles, and forget about the CREATE_CAR etc other commands (you can just ignore them, or replace them with a simple DO_NOWT command. Though, that is trickier to add in the IF's like IF(delay(5)) or something. But in my decompiler source code you can find all those commands which are "boolean" so they return a bool value, which means they are used in if-structures. You can find them with these keywords in the scr_functions.h: TWO_PARAMS_LAYOUT_BOOL, FOUR_PARAMS_LAYOUT_BOOL, CUSTOM_STRUCT_LAYOUT_BOOL, ZERO_PARAMS_LAYOUT_BOOL.

B-$hep wrote:

And i think same will be with compiler. You will make it in 1-2 days maybe and that's it.

I wont. I have other stuff to be busy with. Honestly.

B-$hep wrote:

You really should use more #ifdef #endif in your headers to avoid multiple declarations errors.
Or just #pragma once
It's very good practice. I got a bunch of errors from VC++ and wondered why. And then i discovered that you don't have these commands at the beginning of the header files.
I added and errors went away.
I know that scr decompiler dll compiles but when using stuff in other projects you (users) will have problems.

Yeah the code is shitty, didnt really think how to make it "good", just wanted to make it easy as possible. Didnt really care either, since i knew nobody will use it anyways.

Here is something i figured from the IF's before:

Syntax: [ Download ] [ Hide ]

Using C++ Syntax Highlighting

struct SCR_IF_JUMP {

    SCR_CMD_FORMAT(

        Uint16 logical_operator;// seems to be 0 for AND command and 1 for OR command.

        Uint16 else_jump;// where will it jump if check was false.
);
};

string read_IF_JUMP(FPStruct &params){

    get_data(SCR_IF_JUMP, data);
if(params.header->return_value ==0&& data.logical_operator==0){// not sure about this.
return sprintf_str("ENDIF %s", hexdump(params,0).c_str());
}else{
return sprintf_str("%s", hexdump(params,1).c_str());
}
}Parsed in 0.010 seconds,  using GeSHi 1.0.8.10

(taken from scr_functions.h end of file)

B-$hep · **Posted:** Wed Mar 13, 2013 12:26 pm

Ok thank you so far. Im at work , so cant write much. Will come back later

B-$hep · **Posted:** Sun Mar 17, 2013 10:56 am

Last night i messed with some commands, specially the CAR_DATA command.
And noticed that miss2 either forgot to initialize some of the stuff to 0 or it does something more.

Also T.M, if you are reading this...

Code:

struct SCR_CAR_DATA_DEC {
   SCR_CMD_FORMAT(
      Uint16 varname;

What's the purpose of "varname". Is it even used?
Currently i init this to 0 and GTA2 still works fine.

Also the trailer model thingy, you said in sources that 0xFFFE is mini_car.
miss2 puts a 0x0000 instead of it.
In my compiler i write 0xFFFE if trailer is mini_car. GTA2 shows mini version of car although i don't know the purpose of it, i can't enter the car and control it. Probably for remote only.

There are some things that miss2 does differently, to be exact, it saves some "odd" looking stuff / values that i don't understand. And because of these values some bytes are different in compiled .scr. I mean odd stuff for CAR_DATA specifically.

If you see some missing "h" letters in my posts, im sorry, my keyboard is dying here.

elypter · **Joined:** Sat Dec 26, 2009 11:53 pm **Posts:** 933

yes, minicars are only for remote.

btw, clean your keyboard

(there might be dirt between the different layers of foils)

T.M. · **Posted:** Mon Mar 18, 2013 2:55 pm

B-$hep wrote:

Last night i messed with some commands, specially the CAR_DATA command.
And noticed that miss2 either forgot to initialize some of the stuff to 0 or it does something more.

Also T.M, if you are reading this...

Code:

struct SCR_CAR_DATA_DEC {
   SCR_CMD_FORMAT(
      Uint16 varname;

What's the purpose of "varname". Is it even used?
Currently i init this to 0 and GTA2 still works fine.

Its used in the CREATE_CAR command (read under the first function that uses that struct), it uses the exact same struct. For CAR_DATA command it is not used at all. You can set it to zero indeed. Varname purpose is to store the variable identifier, aka pointer, so we can refer to it later in the code.

Only variables you need to ignore completely are those named "unk1", "unk2" etc.. or "unknown" etc...

B-$hep wrote:

Also the trailer model thingy, you said in sources that 0xFFFE is mini_car.
miss2 puts a 0x0000 instead of it.

Yes. miss2 is crazy. dont trust it... there are lots of bugs in it with those commands! for some commands MINI_CAR doesnt even work! but if you add 0xFFFE manually in the SCR file, then it works in gta2!

B-$hep wrote:

In my compiler i write 0xFFFE if trailer is mini_car. GTA2 shows mini version of car although i don't know the purpose of it, i can't enter the car and control it. Probably for remote only.

Not sure what happened there, but there are lots of bugs indeed. I cant remember what was the logic anymore.........
Did you read this?

Code:

      if(data.trailer_id == 0xFFFE){ // note: compiler doesnt make MINI_CAR in car declarations!
         optional = " MINI_CAR";
      }else if(data.trailer_id != 0xFFFF){ // note: compiler doesnt make trailer in 2d car declarations!
         optional = string(" ")+enum_cstr(CARS,data.trailer_id);
      }

Just make the compiler so it makes code that works in GTA2. dont check your stuff with miss2, its buggy as hell.

B-$hep wrote:

There are some things that miss2 does differently, to be exact, it saves some "odd" looking stuff / values that i don't understand. And because of these values some bytes are different in compiled .scr. I mean odd stuff for CAR_DATA specifically.

If you see some missing "h" letters in my posts, im sorry, my keyboard is dying here.

Those odd things are uninitialized bytes, just random trash, ignore them.

Perhaps its best if you create own struct for each of the commands.... currently im sharing same struct for multiple commands. Dunno really what is the easiest way. You need to think that yourself, i cant remember much from this, been year or two since i made it?

B-$hep · **Posted:** Mon Mar 18, 2013 3:23 pm

Ok.
I added lots of commands and they are binary compatible with miss2 and gta2 runs very fine.
Only few structs have strange values. But anyways, Gta2 is happy and things are going very well.

I also have redesigned Scriptpad ide. New compiler will use it.

GTAMP.com

New GTA2 Script Compiler Preview v0.1

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