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1 user currently in Rom Hacking:  hukka |
| Acmlm's Board - I2 Archive - Rom Hacking - Mario 64 - Amazing Stuff |
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BGNG Snifit Level: 22  Posts: 53/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| You can calculate the size of the compressed MIO0 file. It just takes a little work. The MIO0 header includes an offset for raw data bytes; bytes which are uncompressed. All other data in the file comes before the raw data, so if you can find out the number of uncompressed data bytes, you can easily find the packaged length of the file. Fortunately, the number of raw bytes IS included in the file, just not directly. You'll have to scan through all the "data map prefixes" and tally up the total number of 1's. The number you'll have at the end of all accumulation will be the total number of raw data bytes. Just add the calculated value to the raw data offset and subtract one, and presto: compressed file length. __________ EDIT: My VB instincts are kicking in. In C++, where the first byte of a file is indexed at 0, you won't need to subtract one to find the total length... but you already knew that. (edited by BGNG on 06-19-05 11:14 PM) |
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VL-Tone Red Cheep-cheep Level: 23  Posts: 52/200 EXP: 64158 For next: 3565 Since: 06-06-04 From: In the Moon! Since last post: 5 days Last activity: 2 hours |
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Wow I forgot how this was to be seen as a milestone in M64 hacking  Thanks for all the positive comments I thought about doing a separate thread at first because of the other title, but found that it was better to keep all info in one thread... Ok I just came back from work, I'm gonna cook myself a dinner, then I'll post a little description of the vertex and triangle list format, hopefully someone will be able to build something from it and find the use of the unknown parts. BGNG, I would guess that the reason HyperHacker was crashing the game is because he didn't know what he was doing Seriously I just mean that changing polygon data to random numbers will likely crash the game. Once I post the details of it, you'll be able to know more about it and do more controlled editing. Maybe after-all there is no checksum or size issue involved. Also it took me (only) two nights to crack the format, and hacking StarFox certainly heIped. I had the whole castle displayed only this morning so I didn't have time to do further exploration. Ok now I'm hungry, I have to go Don't be too impatient, but I'll try to post the info in 1 or 2 hours from now. |
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 5110/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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No, it was because I didn't know the game needed the bitmap to be padded to a multiple of 4 bytes.  Once I do that I can edit the data just fine... the problem is getting the compressor to do that right. You're right, though, to assume I don't know much about 3D graphics. |
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BGNG Snifit Level: 22 Posts: 54/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| But one thing is certain, HyperHacker: Your MIO0 compressor works. | |||
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 5114/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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| Almost. The new version has that damn padding bug that's driving me nuts but otherwise, yeah, it's working. Still not as well as Nintendo's though. |
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BGNG Snifit Level: 22 Posts: 55/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| That's kind of ironic... You made a compressor for an all-but-undocumented MIO0 algorithm, but you can't add FileLength % 4 bytes to the end of a file before compressing? I'm not being mean; it's just kinda weird. | |||
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 5115/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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Yeah, bugs the hell out of me. It seems like it's writing one too many bytes in the bitmap, but if I take the last byte out it doesn't work right.  It's always the simple things that get you. |
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VL-Tone Red Cheep-cheep Level: 23 Posts: 53/200 EXP: 64158 For next: 3565 Since: 06-06-04 From: In the Moon! Since last post: 5 days Last activity: 2 hours |
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| HyperHacker, I really didn't want to imply anything negative in my comment What I meant is that you simply didn't know the particular mesh format for M64 at the time (and I didn't know either) and it sure didn't help you to know what you did that crashed the game. I'm sure (I hope) you won't have problems understanding the 3d graphic aspect when I post the info. You did a great job on Mario 64, and I expect it to continue like that in the future Ok here is the basic mesh definition info. Let's look at a simple object in the castle playfield, which is the canon box. This is the triangle data list (which may include other things than triangles)
I only know about the use of chunk type "04" and "BF" 04 B0 00 C0 07 00 BD 50 ----> seems to be the start of a triangle group. The important (known) bytes are the last three: "00 BD 50" 00BD50 will be used as a base address for this triangle group. It points to an address in the current MIO0 file. As you can see in this address table I made, 00BD50 is also the start of the vertex position list.
Each entry in the vertex data list is 16 bytes long. This is the first entry at BD50: 08 EB FE 5A 08 18 00 00 00 06 07 20 00 7F 00 FF To get the 3d space coordinated it's very simple: X=$08EB Y=$FE5A and Z=$0818 These are 16-bits signed integers so for example $FFFF= -1 , $0001=1 and $FE5A=-422 The 7th and 8th bytes are always 0000 it seems. I don't know yet the meaning of the other 8 bytes, I would guess this is the color and/or UV texture coordinates. (color on my rendering were added by me) The last byte is usually either 00 or FF or B4, I used that to find the end of the vertex data. But let's get back to the triangle data... The BF chunk type are triangles defined with 3 bytes, each one pointing to a vertex position. BF 00 00 00 00 28 32 3C is the third triangle in the data. The last three bytes are the important ones here. First take $28 divide by ten, and multiply by 16 (in hex $10). Add the result to the current base address (00BD50) and you get 00BD90 which is the address where you can find this particular vertex position. As far as the other types go, I skipped them when decoding the data. Note that once you get to the second group of triangles starting with a 04 chunk type, the new "base address" will be set to 00BE10. Ok so let's do a round-up as a step-by-step guide to decode the basic mesh data. 1-Read the triangle list data, 8 bytes at a time, skipping any 8 bytes chunk not starting with "04" or "BF" 2-When you find a "04" chunk, read it's last 3 bytes and set the "base address" to this number. 3-When you find a "BF" chunk, start reading it's last 3 bytes. 4-Read the first out of the three last bytes in the BF chunk divide by 10 (dec) and multiply by 16 (dec). 5-Add the current base address to the result and go read 6 bytes at this address. 6-Store/convert the 6 bytes to X,Y,Z coordinates for a point in space. 7-Repeat from step 4 for the last 2 bytes of the current BF data chunk. 8-Store the results as 3 points in space defining a triangle. 9-Repeat the whole sequence from step 1 until you run out of triangle (BF) data The rule I defined to find the end of the triangle data made my routine stop when the chunk type is -not- FD,E6,F3,B8,03,04 or BF. But we need a better way to find the end of the two data lists. Also I had to manually find each entry in this list of addresses for the 44ABC0 MIO0: There is no header or way to find the start of the vertex and triangle lists. So for other MIO0 files we'll have to find them by hand in a hex-editor. There must be an offset table somewhere pointing at those, but I cannot find it. There is still a lot of things missing, but there are allot of people ready to help for this game it seems! So people, remember that we are still a few hundred kilometers before a Mario 64 level editor, but obviously this is a step in the right direction (Edit: Too many edits) (edited by VL-Tone on 06-20-05 02:01 AM) (edited by VL-Tone on 06-20-05 02:05 AM) (edited by VL-Tone on 06-20-05 02:09 AM) (edited by VL-Tone on 06-20-05 02:16 AM) (edited by VL-Tone on 06-20-05 02:40 AM) |
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Shyguy The Original Femme Fatale! Level: 57  Posts: 1228/1998 EXP: 1443008 For next: 42920 Since: 02-14-05 Since last post: 2 hours Last activity: 1 hour |
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Yes, the n00b talks. And he says: WOW!  Just wow. I don't even know where I am anymore! This is something we call a breakthrough. It's Super freakin' Mario blasted 64 you're editing! I wish I knew as much as you all. I am definately a n00b.  |
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Knuckles T15X Keese Level: 20 Posts: 131/134 EXP: 37896 For next: 4543 Since: 03-15-04 From: ROM Hackville, SMASHachussetts Since last post: 109 days Last activity: 11 days |
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Originally posted by BGNGYes, I have the bloody ROM. No, I don't really understand how to extract it from the ROM without access to an emulator since no N64 emulators will work for me. |
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BGNG Snifit Level: 22 Posts: 56/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| Shyguy: I guess some games are more noteworthy than others, eh? I've hacked F- freakin' Zero blasted X, but only people who have been dying for the Expansion Kit have given it much praise. __________ Knuckles T15X: I recommend Project64 v1.6 if you haven't already tried it. It has high compatibility for both target system and ROM support, so it might do the job for you. |
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 5123/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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| Yeah, I thought it was pretty amazing that you were able to do that, but I hadn't really played the game much before then. (It'd help if I didn't have to close everything to get it running full speed either. ) Mario 64 is a lot more well-known though, despite how much ass F-Zero kicks. |
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NEONswift Rope Level: 19 Posts: 55/117 EXP: 30883 For next: 4894 Since: 03-17-04 From: England Since last post: 24 days Last activity: 1 day |
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Originally posted by BGNGDude youre a fuckin god for doing F-Zero X. I dont really need the editor myself seeing as my best mate has the 64DD and the expansion kit. People who arent as lucky though to have an obscure piece of Crazy Jap kit will definately need to take a look at your work. If they havent already they don't know what theyre missing. Like a year ago people said it was gonna be years before anyone hacks a 64 game and noobs asking this in threads were laughed at and told to bugger off. How times change. |
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Kyoufu Kawa I'm not bad. I'm just drawn that way. Level: 70  Posts: 1675/2481 EXP: 3008456 For next: 7355 Since: 03-19-04 From: Catgirl Central Since last post: 14 hours Last activity: 13 hours |
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| Here's my three cents: Cent 1: Mario's screenwipe Cent 2: Level data for Peach's Castle (main garden) Cent 1: Full script + table All three are from the DS version cos I don't have the 64 version. Cent 2 includes pre-unpacked files for comparison with 64  |
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BGNG Snifit Level: 22 Posts: 58/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| That's great and all, but there are two Cent 1's and zero Cent 3's. | |||
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Kyoufu Kawa I'm not bad. I'm just drawn that way. Level: 70 Posts: 1678/2481 EXP: 3008456 For next: 7355 Since: 03-19-04 From: Catgirl Central Since last post: 14 hours Last activity: 13 hours |
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| Don't you know the old acmlmboard saying "there is no three"? | |||
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BGNG Snifit Level: 22 Posts: 59/276 EXP: 56579 For next: 1771 Since: 06-03-05 Since last post: 8 days Last activity: 3 hours |
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| No. There is no "there is no three" | |||
Kario In Possession of a Stolen Shovel Level: 65 Posts: 1822/2082 EXP: 2321379 For next: 14249 Since: 03-15-04 From: Texas... Yeehaw! Since last post: 2 days Last activity: 17 hours |
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Originally posted by Smallhacker Just thought I would point out something in case you didnt know. The infinite stairs dont go on forever. There is just a point that it resets you closer to the bottom, but it is set up so it doesnt look obvious. If you walk up it backwards you will see what i mean. |
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NEONswift Rope Level: 19 Posts: 56/117 EXP: 30883 For next: 4894 Since: 03-17-04 From: England Since last post: 24 days Last activity: 1 day |
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Originally posted by SawnecDude if you noticed the post that said about a 3d render of the inifinate stairs how the hell did you miss the post that came right after saying "DS version shows that the instant you reach a specific step, you're pushed back."?!?Originally posted by Smallhacker (edited by NEONswift on 06-20-05 05:21 PM) |
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Knuckles T15X Keese Level: 20 Posts: 132/134 EXP: 37896 For next: 4543 Since: 03-15-04 From: ROM Hackville, SMASHachussetts Since last post: 109 days Last activity: 11 days |
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Originally posted by BGNGYeah-huh. That's the first one I tried. My GFX card apparently isn't good enough for it. So, is there a method to get the geometry without using an emulator? |
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| Acmlm's Board - I2 Archive - Rom Hacking - Mario 64 - Amazing Stuff |
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