SADX/SA1 Hacking/Modding

Ugh. Why am I so bad at noticing Floats? Gravity isn't a Word at 03B0F0FE, it's a Float reading '-1' at 03B0F0FC!

 

Just like the old games. The shield is probably a separate object... but then why can you change its size in your object data?

 

'Model Address' is better described as 'Animation Address'. Every 16 ($10) bytes is an animation starting with a pointer to an address in chrmodels.dll ($10000000). I copied the second pointer over the first and Sonic repeatedly played the 'Transition to surfer stance' animation when standing. Editing these addresses could give us better model swaps that don't freeze/glitch horribly.
Edit: I edited the SADX SCHG article to link to mine.

 

On the animation format, it seems that byte $4 is usually $49, and if byte $5 is $4, when the animation finishes it will change to the animation specified in byte $6. If byte $5 is $3, the animation will repeat.
Edit: Setting byte $B to $C0 or above makes you invisible.
Setting byte $5 to $2 makes the character stand straight up, not moving, with arms and legs pointed straight down.
Edit2: Disregard byte $B. $8 is transition speed Float, and $C is animation speed Float.
Edit3: I hit refresh and suddenly I'm a tech member!

 

Edit2: Super Sonic can not spindash. He lacks a Spindash action.
Edit: Object Editor moved to first post.

 

Okay, so you're hacking it beyond doing what the game does for Super Sonic. Also, I finished the editor, but I'm too lazy to make lists for anything other than Hedgehog Hammer and Emerald Coast. If you try another level, it will crash. Also, Get Properties takes your current position and copies it to the Property fields for rockets and dash hoops.

 

I'm not sure about that. The flag makes him invincible and the acceleration value is increased during the Perfect Chaos fight. I think the aura is simply an object displayed over Sonic like the shields and invincibilty sparkles and doesn't affect gameplay. A lot of stuff in this game is very similar to S3K. All the pieces are loaded separately and you have to do 5 different things to get what you want.

 

His acceleration definitely decreased. But that could be because the level has extra code that runs when the Super Sonic flag is deactivated. I could check what writes to the acceleration address when that happens. And I don't know anything about sound effects. Maybe near the music address?
Here's the code near that:

Code (Text):

1. 004942D0 - 8b 44 24 04                - mov eax,[esp+04]
2. 004942D4 - 56                         - push esi
3. 004942D5 - 8b 70 2c                   - mov esi,[eax+2c]
4. 004942D8 - 8a 0e                      - mov cl,[esi]
5. 004942DA - 88 4c 24 08                - mov [esp+08],cl
6. 004942DE - 8b 54 24 08                - mov edx,[esp+08]
7. 004942E2 - 52                         - push edx
8. 004942E3 - e8 18 d8 fa ff             - call 00441b00; load pointer into eax
9. 004942E8 - 83 c4 04                   - add esp,04
10. 004942EB - 85 c0                      - test eax,eax; test someting
11. 004942ED - 74 25                      - je 00494314; and skip to pop esi if equal
12. 004942EF - 8b 4e 04                   - mov ecx,[esi+04]
13. 004942F2 - 89 88 ac 00 00 00          - mov [eax+000000ac],ecx; Change Value at $AC?
14. 004942F8 - 8b 56 08                   - mov edx,[esi+08]
15. 004942FB - 89 90 d8 00 00 00          - mov [eax+000000d8],edx; Change Ground Acceleration
16. 00494301 - 8b 4e 0c                   - mov ecx,[esi+0c]
17. 00494304 - 89 88 dc 00 00 00          - mov [eax+000000dc],ecx; Change Air Acceleration
18. 0049430A - c7 80 1c 01 00 00 cd cc ac 40 - mov [eax+0000011c],40accccd; Change Y Offset
19. 00494314 - 5e                         - pop esi
20. 00494315 - c3                         - ret

 

I just followed some of the code, and it looks like there's a pointer table at $A000000. I also found a pointer that when zeroed disabled the aura (super speed and invincibility intact) and made me go right through Perfect Chaos like he wasn't even there.

 

I'm working on the rest of them. I made a quick program to convert the wiki text. I would upload one now, but the board won't let me. I'll just make a new zip later.
Edit: Wow, there are 16 objects in Speed Highway not on the list.
Edit2: And now I can't edit the wiki.
Edit3: Fixed.
Edit4: 30 Unknowns for Red Mountain.
New levels for the editor!