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| Acmlm's Board - I3 Archive - ROM Hacking - Hacking AW2 Maps |
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amnesiahacker Red Goomba                 Since: 12-21-05 Last post: 6490 days Last view: 6490 days |
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| I have been trying to edit maps in AW2 but I can't find the data anywhere, I have tried even using an SWI log and checking lz77 compressed data but no change in anything. Can anyone help me with edting the maps? | |||
Xenesis Blipper    Since: 11-19-05 From: Australia Last post: 6283 days Last view: 6283 days |
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| Seriously, all I will say is that editing AW2 maps is really fucking difficult. Editing map headers and predeployed units is a piece of piss, but trying to make a new landform is excruciatingly difficult.
Of course, it isn't helped that it appears that each tile ID is used (of which there are far too many). Now, I can tell you where they are.. This leads to the map header info: http://forums.warsworldnews.com/viewtopic.php?t=1247 Location of map headers and some map data: http://forums.warsworldnews.com/viewtopic.php?t=3159 Now, if you can figure out the bloody map's compression, I will personally bow in your presence. All I can tell for the actual map is that the first 7 bytes are significant, and I believe the 6th and 7th are used to determine map dimensions from memory. |
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labmaster Red Paragoomba  Since: 11-18-05 From: Away for exams, back mid-December. Last post: 6358 days Last view: 6288 days |
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| I can say with 80% confidence that the map data is probably LZ77 (as per the BIOS) compressed.
edit: scratch that, I'd guarantee that it is. You're fortunate in that the implementation used in the GBA's BIOS is extremely well documented. I smell a potential editor project  (edited by labmaster on 07-21-06 07:13 AM) (edited by labmaster on 07-21-06 07:13 AM) |
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Xenesis Blipper Since: 11-19-05 From: Australia Last post: 6283 days Last view: 6283 days |
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| Now explain to me how to decompress Lz77 by hand, and then recompress it, and I'll love you forever.
I read the document on Hyperhacker's site about it, but I'm still thoroughly confused.  ;
As for an editor, yes. I'm learning Java (slowly) for that purpose. |
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Celice Gordo  Since: 11-17-05 From: Oroville, CA Last post: 6287 days Last view: 6283 days |
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| Couldn't you just use the unlz-GBA? I'd think it'd allow you to dump a range of data, rather than just what it finds. If not, you could try the deepscan mode :/ | |||
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Xenesis Blipper Since: 11-19-05 From: Australia Last post: 6283 days Last view: 6283 days |
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| You know, I never thought of that, especially as I know where several million map pointers are. ;
Of course, getting a useable output would be rather difficult, but I'll give it a shot and report back.  |
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Yoronosuku Toss Tortoise Since: 11-17-05 From: Massachusetts is my new home.. Last post: 6282 days Last view: 6282 days |
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Originally posted by Celice Isn't that only for graphics though? Or perhaps I'm missing something.. |
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amnesiahacker Red Goomba Since: 12-21-05 Last post: 6490 days Last view: 6490 days |
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| Perhaps I didnt investigate enough values in the SWI log hmmm I'll look into it tomorrow and post my results.
@Yoronosoku unLZ-GBA shows up all compressed data in GFX form - meaning that some of the garbage data you find is possible layout data in the game |
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labmaster Red Paragoomba Since: 11-18-05 From: Away for exams, back mid-December. Last post: 6358 days Last view: 6288 days |
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| Ones to look out for in particular are 0x0201d450 (Map data) and 0x02003010 (Mini map, I think). | |||
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amnesiahacker Red Goomba Since: 12-21-05 Last post: 6490 days Last view: 6490 days |
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thanks loadz labmaster that'll narrow it down greatly  because it is a huge log file (325kb) |
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Alchemic Since: 11-17-05 Last post: 6396 days Last view: 6282 days |
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| I haven't looked into the recompression process yet, but this may be useful in decompressing by hand...
The compressed data has a four byte header: the first byte is always 0x10 (which I think specifies LZ77), and the remaining three are the length of the data when decompressed, stored in little-endian form. This is followed by a repeated pattern of one flag byte and eight "blocks", until "length" bytes have been decompressed. The flag byte is read starting from the most significant bit. If the current bit is 0, an uncompressed block follows, which is just one uncompressed byte. If the current bit is 1, a reference to past data follows. It takes two bytes - here's what it looks like on a bit level: [aaaabbbb bbbbbbbb] The "a" part is related to the number of bytes to copy - add 3 to this value and that's how many bytes will be decompressed out. The "b" part is how far back to go. The byte before this reference to past data is considered 00, the one before that is 01, and so on back. And example may be useful at this point - I'll use the map for "Cleanup", located at 1C7528. [10] - LZ77 indicator? [2E 01 00] - 0x12E, the length of the decompressed data (302 bytes). [08] - The first flag byte. 0x80 bit: 0. Uncompressed byte. [0F] 0x40 bit: 0. Uncompressed byte. [0A] (Note: the length values are compressed like the rest of the data - there's nothing special about them from a compression point of view.) 0x20 bit: 0. Uncompressed byte. [2A] <-- considered "01" back by what follows 0x10 bit: 0. Uncompressed byte. [00] <-- considered "00" back by what follows 0x08 bit: 1. A reference to past data: [10 01]. Copy 1+3 (4) bytes from "01" ago, so [2A 00 2A 00]. 0x04, 0x02 and 0x01 bits: 0. Uncompressed bytes. [28], [00], [87]. [0D] - The next flag byte. And so on out, until the length value is reached. |
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Xenesis Blipper Since: 11-19-05 From: Australia Last post: 6283 days Last view: 6283 days |
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| I'm going to have to re-read that a dozen times before I get my head around it, but thanks for that.
Also, I have just confirmed...the 6th and 7th bytes of the map data are the x width and y height, assuming you leave the first compression in the header as is. Edit: Ahahaha! Yeehaa! Excellent! It's quite possible to create a fully uncompressed map simply by entering the individual tile bytes in and then placing an 00 byte after every 8 bytes! You don't know how long I've wanted to do this for! Sure, making decompressed maps is in no way efficient whatsoever, but it's now possible to map hack! Whee! :o Better continue on my list of Tile Ids then. 
I'm really grateful...you don't know how helpful this is. Edit 2: A list of tile IDs for the first 0x020F tiles. Format is little endian? Eg, a plain is 01 00. Terrain list: 00 Set 01 Plain 02 Low Mountain 03 Plain with Mountain peak below 04 Plain with Rubble 05 N/A 06 N/A 07 N/A 08 Sea (Land on all sides) 09 Sea (Land in Bottom Right) 0a Sea (Land in bottom) 0b Sea (Land in Bottom L, Bottom R) 0c Sea (Land L and R) 0d Sea (Land BL and TR) 0e N/A 0f N/A 10 Shoal (Land S) 11 N/A 12 N/A 13 East/West Bridge 14 East/West Bridge 15 East/West Bridge again? 16 North/South Bridge 17 Sea (Land Top/Bottom) 18 North/South River 19 East/West River 1A T Intersection North/East/West River 1B + Intersection River 1C East/West River 1D East/West Rive (South Bank only) 1E North/South River (No Banks) 1F North/South River (No Banks again?) 20 Short Mountain 21 Plain (Mountain Shadow West) 22 Tall Mountain (Cut off Top, Mountain Top at bottom) 23 Tall Mountain (Cut off Top) 24 Forest + Forest Clump (Bottom Right) 25 Forest + Forest Clump (Bottom Right) 26 Forest + Forest Clump (Bottom) 27 Forest + Forest Clump (Bottom Left) 28 Sea (Land Right) 29 Sea (Land Right + Bottom curve) 2A Sea 2B Sea (Land Left + Bottom curve) 2C Sea (Land Left) 2D Sea (Land Top L, Bottom R) 2E Shoal (Land R) 2F Shoal (Land R-Bottom curve) 30 N/A 31 Shoal (Land L-Bottom Curve) 32 Shoal (Land L) 33 Sea (Land L+R) 34 Sea (Land L) 35 Sea (Land R) 36 N/S Bridge 37 Sea (Land Top, Bottom R) 38 Another damn N/S River 39 Another E/W River 3A T-River (E/W/S) 3B N/A 3C Another E/W River 3D Another Another E/W River 3E N/A 3F N/A 40 N/S Road 41 S/E Road 42 S/W Road 43 Plain with Mountaintop 44 Forest + Forest Clumps (Right) 45 Forest + Forest Clumps (Right) 46 Forest Clumps (Centre) 47 Forest + Clumps (Bottom Left) 48 Sea (Land Top Right) 49 Sea (Land Top to Right Curve) 4A Sea (Land Top) 4B Sea (Land Top to Left Curve) 4C Sea (Land Top Left) 4D N/A 4E N/A 4F Shoal (Top to Right Curve) 50 Shoal (North) 51 Shoal (Top to Left Curve) 52 N/A 53 U Shoal (Open on Right) 54 U Shoal (Open on left) 55 U Shoal (Open T) 56 N/A 57 N/S River 58 S/E River 59 S/W River 5A S/E River 5B S/W River 5C N/S River (No Right Bank) 5D N/S River (No Left Bank) 5E N/S River (No Right Bank, Up Flow) 5F N/S River (No Left Bank, Up Flow) 60 N/E Road 61 E/W Road 62 N/W Road 63 N/A 64 Forest + TopR Clumps 65 Forest + TopR Clumps 66 Forest + TopR Clumps + Left Shadow 67 Forest + Left Shadow 68 U Sea (Bottom Open) 69 Sea (Land Bottom L + Bottom R) 6A U Sea (R Open) 6B Sea (Land Top L + Bottom L) 6C Sea (Land Top + B) 6D Shoal (Land Bottom, Low-High Curve) 6E Shoal (Land Bottom, High-Low Curve) 6F N/A 70 N/A 71 N/A 72 N/A 73 N/A 74 N/A 75 U Shoal (B Open) 76 N/A 77 N/A 78 N/E River 79 N/W River 7A N/E River 7B N/W River 7C T-River (N/S/W) 7D T-River (N/S/E) 7E T-River (N/S/W) 7F T-River (N/S/E) 80 N/S Road (Shadow) 81 N/E Road (shadow) 82 N/W Road (Shadow) 83 N/S Road 84 E/W Road 85 E/W Road 86 Forest 87 Forest 88 T NEW Sea 89 U-Sea (N Open) 8A T-Sea NSE 8B U-Sea (L Open) 8C N/A 8D N/A 8E N/A 8F North Shoal (Low-High-Low) 90 N/A 91 N/A 92 End Shoal (West Face) 93 End Shoal (East Face) 94 N/A 95 N/A 96 N/A 97 N/A 98 N/E River 99 S/W River 9A S/E River 9B S/W River 9C T-River N/S/E 9D T-River N/S/W 9E T-River N/S/E 9F T-River N/S/W A0 N/W Road + Shadow A1 E/W Road + Shadow A2 N/W Road + Shadow A3 N/S Road + Shadow A4 E/W Road + Shadow A5 E/W Road + Shadow A6 Forest Clump A7 Forest Clump (Top R Corner) A8 Sea Land L + BR A9 Sea Land R + BL AA T-Sea NSE AB T-Sea NSW AC N/A AD N/A AE N/A AF W-Face Shoal BO E F Shoal B1 N B2 Top R Corner Shoal B3 Top L Corner Shoal B4 N B5 N B6 BR CornerShoal B7 BL Corner Shoal B8 NE River B9 NW River BA NE River BB EW River BC EW River BD EW River BE EW River BF EW River C0 NEW Road C1 NES Road C2 NEW Road S C3 NES Road S C4 NE Road C5 NE Road C6 Forest Clump C7 Forest Clump C8 NES Ocean C9 NWS Ocean CA N CB M CD S Shoal CE S Shoal CF W Shoal D0 E Shoal D1 N D2 Bottom R Corner Shoal D3 Bottom L Corner Shoal D4 N D5 N D6 TR Corner Shoal D7 TL Corner Shoal D8 NES River D9 NWS River DA NES River DB NWS River DC EW River DD EW River DE EW River DF EW River E0 EWS Road E1 NES Road E2 EWS Road Shadow E3 NES Road Shadow E4 NE Road Shadow E5 NE Road Shadow E6 Forest Clump E7 N E8 EW Sea E9 EW Sea EA EW SEa EB ES Sea EC WS Sea ED N EE N EF S Shoal F0 N F1 N F2 BL Corner Shoal F3 BR Corner Shoal F4 N F5 N F6 N F7 N F8 NES River F9 NWS River FA NES River FB NWS River FC Turbulent River FD Turbulent River FE N FF N 01 Set 00 + Road 01 + Road Shadow 02 N Cap Pipe 03 S Cap Pipe 04 NW Road 05 NW Road 06 Plain + Forest 07 Plain + Forest 08 Sea 09 Sea 0A Sea 0B Sea 0C Sea 0D N 0E N 0F N 10 N 11 N 12 TL Corner Shoal 13 TR Corner Shoal 14 N 15 N 16 N 17 N 18 River 19 River 1A River 1B River 1C River -> Sea 1D River -> Sea 1E N 1F N 20 W Pipe Cap 21 E Pipe Cap 22 NS Broken Seam 23 EW Broken Seam 24 NW Road 25 NW Road 26 Plain + Forest 27 Plain + Forest 28 Sea 29 Sea 2A Sea 2B Sea 2C Sea 2D N 2E N 2F N 30 .. 37 N/A 38 River 39 River 3A .. 3F N/A 40 NE Pipe 41 NW Pipe 42 EW Pipe 43 NS Pipe 44 WS Road 45 WS Road Shadow 46 N 47 N 48 .. 4F N/A 50 - 5F N/A 60 NE Pipe 61 NW Pipe 62 NS Pipe Seam 63 EW Pipe Seam 64 SE Road 65 SE Road + Shadow 66 N 67 N 68 Reef 69 - 7F N/A 80 Missile Silo 81 Laser Shooter 82 S Minicannon 83 N Minicannon 84 W Minicannon 85 E Minicannon 86 Umi (Appears as Plain. Placed under Multitile Black Inventions) 87 South B Cannon (Overwrites 8 tiles surrounding it as well as Black cannon) 88 Umi 89 Umi 8A North B Cannon 8B Umi 8C Umi 8D 'Factory' 8E Umi 8F Umi 90 Deathray 91 Umi 92 - 9F N/A A0 Launched Silo A1 - A3 N/A A4 Umi A5 Umi Mountain (Volcano) A6 Umi A7 Volcano (Takes up the tiles 1 Left, 2 Right and 2 Above 1 Below) A8 - AA Umi AB - 'Blocked' (Under Black Fortress/Factory) AC Umi AD Umi AE + Road AF Garbled Factory B0 Umi B1 Umi B2 - BF N/A C0 Neut HQ C1 Neut Base C2 Neut City C3 Neut Airport C4 Neut Port C5 OS HQ C6 OS Base C7 OS City C8 OS Airport C9 OS Port CA BM HQ CB BM Base CC BM City CD BM Airport CE BM Port CF GE HQ D0 GE Base D1 GE City D2 GE Airport D3 GE Port D4 YC HQ D5 YC Base D6 YC City D7 YC Airport D8 YC Port D9 Neutral Lab DA OS Lab DB BM Lab DC GE Lab DD YC Lab DE N DF N E0 - FF - Sequence Repeats 02 Lot 00 - 0F Blank (edited by Xenesis on 07-26-06 10:51 PM) (edited by Xenesis on 07-27-06 12:34 AM) (edited by Xenesis on 07-27-06 12:37 AM) (edited by Xenesis on 07-27-06 02:39 AM) (edited by Xenesis on 07-27-06 02:44 AM) |
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