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Jul - SM64 Hacking (Archive) - Mario Geometry Layout Deconstruction New poll - New thread - New reply
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VL-Tone
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Posted on 08-06-07 04:08:52 AM Link | Quote
I didn't manage until recently to correctly decode Mario's Geometry Layout data, mainly because of some commands I didn't know the length of.

Mario has by far the most complicated geometry layout of all animated characters in the game.

But that's mainly because of the LOD (level of detail) system, which creates four variations of Mario: One with all the high-polygon parts, the other with some high and some low polygon parts, another with only low polygon parts, and another with very low polygon parts.

Then, there's also four variation of Mario's body, the first one is normal, the 2nd which seems unused in the game, with half metal parts and half normal parts, and the two others seems to be metal Mario, though the last one doesn't seem to be used in the game.

So, in total, that makes 16 different Mario variation, each having a similar or the same structure, but pointing to different polygon parts.

The geometry layout data is structured in a hierarchy, with command 0x04 opening a node, and 0x05 closing the node. Nodes preceded by the 0x0E commands are animated. The animation code chooses inside that node which command or sub-node is used.

For example:

00127CA4/02F4:     0E 00 00 00 80 27 77 40 

00127CAC/02FC:     04 00 00 00 

00127CB0/0300:       0E 00 00 00 80 27 71 BC 

00127CB8/0308:       04 00 00 00 

00127CBC/030C:         15 01 00 00 04 01 19 A0 -- head 1 hp color

00127CC4/0314:         15 01 00 00 04 01 1A 90 -- head 2 hp color

00127CCC/031C:         15 01 00 00 04 01 1B 80 -- head 3 hp color

00127CD4/0324:         15 01 00 00 04 01 1C 70 -- head 4 hp color

00127CDC/032C:         15 01 00 00 04 01 1D 60 -- head 5 hp color

00127CE4/0334:         15 01 00 00 04 01 1E 50 -- head 6 hp color

00127CEC/033C:         15 01 00 00 04 01 1F 40 -- head 7 hp color

00127CF4/0344:         15 01 00 00 04 01 20 30 -- head 8 hp color

00127CFC/034C:       05 00 00 00 

00127D00/0350:       0E 00 00 00 80 27 71 BC 

00127D08/0358:       04 00 00 00 

00127D0C/035C:         15 01 00 00 04 01 39 E8 -- head no cap 1 hp color

00127D14/0364:         15 01 00 00 04 01 3A B8 -- head no cap 2 hp color

00127D1C/036C:         15 01 00 00 04 01 3B 88 -- head no cap 3 hp color

00127D24/0374:         15 01 00 00 04 01 3C 58 -- head no cap 4 hp color

00127D2C/037C:         15 01 00 00 04 01 3D 28 -- head no cap 5 hp color

00127D34/0384:         15 01 00 00 04 01 3D F8 -- head no cap 6 hp color

00127D3C/038C:         15 01 00 00 04 01 3E C8 -- head no cap 7 hp color

00127D44/0394:         15 01 00 00 04 01 3F 98 -- head no cap 8 hp color

00127D4C/039C:       05 00 00 00 

00127D50/03A0:     05 00 00 00


(hmmm... the "pre" tag inserts additional linefeeds?)

So in this example, the root node is "animated" by the code, which choses the one of the two sub-node, depending on if Mario is wearing his hat or not. Then, in the sub-node, the animation code choses which head to use, depending on the state of the eyes animation.

Here's the fully decoded Mario geometry layout, with text labels for body parts: MarioGeoLayout.txt

HP means High Polygon, LP means Low Polygon and VLP means Very Low Polygon.

The addresses found at the beginning of each line show the actual ROM address and after the slash the offset in the current geometry layout segment/bank which starts at 001279B0.

Note that this doc also includes small accessory objects which are also found in the same geometry layout bank, and incidentally in the same MIO0 file.

To help you understand the meaning of geometry layout commands, here's the newly updated Mario 64 Hacking Doc which includes much more geo layout commands than the original doc. Keep in mind that this doc is aimed at experienced ROM hackers.

The root of the Mario geometry layout is found near the end, at 0012A784/2DD4, and this is where the 0x22 command for Mario points to. At the root the two main branches are the High Poly Mario, and the LOD Mario (which includes the HP Mario). The "High Poly Mario" feature in TT64 works by changing the destination of the 0x02 command that normally jumps to the LOD Mario part so that it points to the next command instead, in effect disabling the low-poly Marios.


As a bonus, here's a similar deconstruction of Peach's geo layout, also with body parts labels: PeachGeo.txt

Some very experienced hacker could, with these docs and a lot of work, change Mario into Peach. It's far from simple since she has no legs, and her body parts hierarchy is a little different, and it would require re-positioning each body part. Also, you could only play with her on the Castle Grounds level, and she would sound like Mario

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Posted on 08-06-07 03:24:13 PM; last edit by Xtreme Starfox on 08-06-07 03:27 PM Link | Quote
I Got A "Turn Mario Into Peach Code" But She Is Kinda Invisible....I'll Post The "Code" When I Find It...


Here:
Play As Peach While Outside Castle (Kinda Invisible)

D134B89E 0860
8134B89C 8019
D134B89E 0860
8134B89E 4690

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Posted on 08-06-07 03:27:04 PM Link | Quote
Oh, yes I tried this code also. She needs some texture though.

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[Posted by Dudaw]
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Posted on 08-06-07 03:30:07 PM Link | Quote
But Why is She The Only One Without Textures?

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Posted on 08-06-07 03:58:04 PM Link | Quote
It may be because her actions don't match Mario's correctly. Like a Goomba, It doesn't have that many body parts to move, neither do the others, so they will match.

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===================
[Posted by Dudaw]
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Posted on 08-06-07 04:00:01 PM; last edit by Darkdata on 08-06-07 04:02 PM Link | Quote
DPP - [internet://board/post87.bit] - 08-06-07 04:00:01 PM
File Edit View Settings ?
Originally posted by Dudaw
It may be because her actions don't match Mario's correctly. Like a Goomba, It doesn't have that many body parts to move, neither do the others, so they will match.


No.. her texture is just not loaded. It seems to be only loaded in the ending where she floats down from the castle....

I could be wrong too, of course.

Edit: That sprite deconstruction is interesting... hmm...

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Posted on 08-06-07 04:05:10 PM; last edit by Dudaw on 08-06-07 04:45 PM Link | Quote
Darkdata: Well..... It was just an educated guess.

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===================
[Posted by Dudaw]
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Posted on 08-06-07 06:23:26 PM Link | Quote
Time: Now - Date: Today - Weather: What can be seen outside. - Mood: How it feels. Answer to the universe: 42
If you look at her geometry layout, you find that there are two versions of Peach, the main difference being in the 0x15 and 0x13 commands.

From Peach version 1:

0018062C/00EC: 15 01 00 00 05 00 5C E0 -- head (kissing) 1

Peach version 2:

001807E8/02A8: 15 05 00 00 05 00 5C E0 -- head (kissing) 1


What's the difference? The second byte in the command changes from 01 to 05.

This second byte controls the "drawing layer" of polygons. It's not exactly z-ordering, it's more about ensuring that transparent textures (often drawn in the same layer) appear correctly.

For some reason, Peach 2 is set to 05, it seems more to have something with her fading out in the intro.

While you could manually change all 05 to 01, there a simpler solution.


This is the entry point/root of the Peach geometry layout:
 


00180950/0410:   16 00 00 00 00 96 00 64

00180958/0418:   04 00 00 00

0018095C/041C:     1D 00 00 00 00 00 40 00

00180964/0424:     04 00 00 00

00180968/0428:       18 00 00 0A 80 29 D9 24

00180970/0430:       0E 00 00 02 80 29 DB 48

00180978/0438:       04 00 00 00

0018097C/043C:         02 01 00 00 0C 00 00 98

--Jump to: 00823BFC/0098

00180984/0444:         02 01 00 00 0C 00 02 54

--Jump to: 00823DB8/0254

0018098C/044C:       05 00 00 00

00180990/0450:     05 00 00 00

00180994/0454:   05 00 00 00

00180998/0458:   01 00 00 00


Note that the animation code can chose between two jump points, and incidentally they point to the two peach versions.

If you change this command:

02 01 00 00 0C 00 02 54

into this:

02 01 00 00 0C 00 00 98

You'll be sure that only version 1 is used, and you'll be able to see her with that GS code.



But, as I predicted, she's severally glitched because her body part hierarchy doesn't match Mario.

To do the modification, go to 18098A and change 0254 to 0098. If you don't know how to do this, don't ask in the SM64 hacking forum.

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John2k4
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Posted on 08-09-07 05:31:14 PM Link | Quote
Yeah, I noticed that the Peach Code worked fine when the game ended, but when Mario would walk, he\she got severally messed up.

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Posted on 01-20-08 02:58:31 AM Link | Quote
Firstly, there is a byte in an object's structure which when set to FF disables transparency so you can use that. Secondly you need Peach's animation pointer otherwise she will be messed up. Just look at my video-Playing as Peach in Super Mario 64-to see how it's done with codes.

James S.

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Jul - SM64 Hacking (Archive) - Mario Geometry Layout Deconstruction New poll - New thread - New reply


Rusted Logic
Acmlmboard - commit 47be4dc [2021-08-23]
©2000-2022 Acmlm, Xkeeper, Kaito Sinclaire, et al.

27 database queries, 1 query cache hits.
Query execution time:  0.101829 seconds
Script execution time:  0.036628 seconds
Total render time:  0.138456 seconds


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