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1 user currently in Super Mario World hacking:  labmaster |
| Acmlm's Board - I2 Archive - Super Mario World hacking - Found code for gravity and jumping. |
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rubixcuber Red Goomba Level: 12 Posts: 3/46 EXP: 6125 For next: 1796 Since: 10-13-04 From: St. Louis, MO USA Since last post: 331 days Last activity: 293 days |
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| At offset 5B30 in the rom: A57D3014D9AFD79003B9AFD7A672F008E00BD004A22486721879A5D7857D Is how the game does gravity for mario. Changing A57D to A57B and 857D to 857B will cause gravity to pull horizontally, changing 79A5D7 to F9A5D7 will reverse the direction of gravity, changing 79A5D7 to EAEAEA will disable gravity, and changing 79A5D7 to 79A2D7 causes a somewhat neutral gravity where you can lower mario by holding jump. I haven't looked into the jump code, but I know that the 857D at offset 5866 is the store instruction in the jump function, so 857B causes mario to jump to the left instead of up. Hope this helps someone. -I also have a question, if I want to use my own function for gravity by using a jump, how does the long absolute jump work? Like if I want to jump to 0B:BBBB and then return? (edited by rubixcuber on 10-15-04 09:22 PM) |
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gnkkwinrrul Dry Bones Level: 39  Posts: 284/647 EXP: 402054 For next: 2717 Since: 03-15-04 From: LYKEOMGIMFROMSOMEPLACE???? Since last post: 81 days Last activity: 40 days |
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whoamg. I'll have to use this  |
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Escherial Shyguy Level: 17 Posts: 64/90 EXP: 20866 For next: 3877 Since: 03-15-04 From: Pasadena, CA Since last post: 202 days Last activity: 38 days |
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| Use JML for "jump long" (can specify an absolute address, if you like); use RTL to return from a long jump (i.e. at the end of your code). | |||
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rubixcuber Red Goomba Level: 12 Posts: 4/46 EXP: 6125 For next: 1796 Since: 10-13-04 From: St. Louis, MO USA Since last post: 331 days Last activity: 293 days |
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| yah, i thought it was jml and rtl, but i havent gotten it to work. i'm editing directly in hex so i had tried something like 220B BBBB and then 6B to return, but the screen always goes black. i'll keep messing with it though (edited by rubixcuber on 10-15-04 09:21 PM) |
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gnkkwinrrul Dry Bones Level: 39 Posts: 288/647 EXP: 402054 For next: 2717 Since: 03-15-04 From: LYKEOMGIMFROMSOMEPLACE???? Since last post: 81 days Last activity: 40 days |
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| keep trying and tell us when you fix it |
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Keikonium Banned Level: NAN Posts: 743/-2459 EXP: NAN For next: 0 Since: 04-02-04 Since last post: 63 days Last activity: 9 hours |
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| So let me get this straight: Pull horizontally makes mario move horizontally without or with moving him first? Or does it just make you go faster when moving? For reverse gravity is that mean that up is down and down is up? If so SOMEONE MAKE IT A CUSTOM BLOCK FOR ME!!! And for disabled gravity, can you move at all? |
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Alastor the Stylish Hey! I made a cool game! It's called "I poisoned half the food, so if you eat you might die!" Have a taco.  Level: 114  Posts: 2407/7620 EXP: 16258468 For next: 51099 Since: 03-15-04 From: Oregon, US Since last post: 2 hours Last activity: 2 hours |
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Originally posted by KeikoniumPull horizontally makes him BE PULLED HORIZONTALLY BY GRAVITY. Could you possibly think a little? And of course reverse gravity does that, but it wouldn't affect graphics so you'd be upside down and it'd look hideous, and it may (not certain of this) screw with jumping even if you included the reverse the way you jump bit. Also. You want a custom block of it, make it yourself. I don't care if you don't know ASM, you need not be so damn greedy  As for the disabled gravity: It doesn't affect your ability to move except that you don't fall. I'm not certain about the way jumping works, it may or may not have jumping propel you indefinitely...(edited by Kratos Aurion on 10-15-04 11:04 PM) (edited by Kratos Aurion on 10-15-04 11:05 PM) |
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rubixcuber Red Goomba Level: 12 Posts: 5/46 EXP: 6125 For next: 1796 Since: 10-13-04 From: St. Louis, MO USA Since last post: 331 days Last activity: 293 days |
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| to gnkkwinrrul: no, no, the things i describe work but i am trying to make a custom block to change the direction of gravity and was having problems with causing a black screen, if you just do the hacks as describe you can change gravity through the whole game to Keikonium: i am working on a custom block and can make it public at some point. with the disabled gravity you can move horizontally, but when you jump you keep going up until you hit something |
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Alastor the Stylish Hey! I made a cool game! It's called "I poisoned half the food, so if you eat you might die!" Have a taco. Level: 114 Posts: 2408/7620 EXP: 16258468 For next: 51099 Since: 03-15-04 From: Oregon, US Since last post: 2 hours Last activity: 2 hours |
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| Tell me. With gravity reversed will you be able to jump if the jump is set in reverse? That is to say, you would jump backwards... I think it would be possible to temporarily overwrite the data with what you've shown, but I'm not certain... Additionally, would it be possible to add graphics data for an upside-down Mario to be loaded when the gravity is flipped, or possibly just to flip the graphics over the x axis? Because it wouldn't be of much use if you couldn't jump and if you were standing on your head at the time, except for forcing Mario to move upward, and there are already blocks that do that. (edited by Kratos Aurion on 10-16-04 12:38 AM) |
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rubixcuber Red Goomba Level: 12 Posts: 6/46 EXP: 6125 For next: 1796 Since: 10-13-04 From: St. Louis, MO USA Since last post: 331 days Last activity: 293 days |
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| I'm working on rewriting the gravity and jumping code in the game to check a variable and change directions depending on the value, and you would be able to jump left if gravity is to the right, etc. As soon as I complete that, I intend to rotate mario's gfx as well. When all or part is complete, I'll post again, but no guarantees on how soon. | |||
Smallhacker Green Birdo SMW Hacking Moderator Level: 68  Posts: 654/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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| Yay! Really interesting. I'll play around with it later. | |||
blackhole89 LOLSEALS Moderator of ROM hacking EmuNET IRC network admin Head GM of TwilightRO Level: 47  Posts: 366/971 EXP: 739208 For next: 26995 Since: 03-15-04 From: Dresden/Germany Since last post: 14 hours Last activity: 12 hours |
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| Concerning the jumps, if there is any assembler that supports JML, DON'T USE THAT. Just jump means, your current address is not put into RAM. Use JSL (Jump Subroutine Long or JSR with a 24 bit parameter (depends on your current assembler)) and RTL (Return Subroutine Long). In hex, your example (jump to 0B:BBBB) would be 22 BB BB 0B. Or, to make it even more clear, a jump to 0A:BCDE is 22 DE BC 0A. RTL, as you said, is 6B. Have fun, ~Blacky. |
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Someguy Buzzy Beetle It seems as though the girl you've fallen for is also a pyromaniac. Level: 32  Posts: 102/397 EXP: 193329 For next: 13113 Since: 03-15-04 From: I'm proud to be an American... I think... Since last post: 1 day Last activity: 5 hours |
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Originally posted by rubixcuber I thought that the SNES didn't naturally support rotating without certen modes, hence the need for rotated graphics for the triangle blocks. I may be wrong, or you may know of a way to add something like what YI used, or possibly just hack the whole animation system to allow a set for normal and sideways gravities. |
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gnkkwinrrul Dry Bones Level: 39 Posts: 294/647 EXP: 402054 For next: 2717 Since: 03-15-04 From: LYKEOMGIMFROMSOMEPLACE???? Since last post: 81 days Last activity: 40 days |
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I believe all you would have to change would be some extra mario sprites that are him upside down...not all the graphics  |
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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: 1792/8210 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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| *drool* You can do X/Y flips, but you'd have to do some TSA re-arrangement for it to look right. I dunno how he intends to do sideways, though. This'd be so cool... I'd do it if he wasn't.  |
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Smallhacker Green Birdo SMW Hacking Moderator Level: 68 Posts: 669/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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| You know what would be perfecty to do with this info? Super Mario Space Adventure! | |||
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blackhole89 LOLSEALS Moderator of ROM hacking EmuNET IRC network admin Head GM of TwilightRO Level: 47 Posts: 369/971 EXP: 739208 For next: 26995 Since: 03-15-04 From: Dresden/Germany Since last post: 14 hours Last activity: 12 hours |
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| For that, you would have to add some vertical movement code (for gravity wouldn't work anymore...). Actually, I was playing around with gravity already for a long while, but using a different method (BMF's palette hook installed subroutine applying its own gravity). Horizontal gravity could btw be used as wind (that's what I did with it,too). |
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Keikonium Banned Level: NAN Posts: 746/-2459 EXP: NAN For next: 0 Since: 04-02-04 Since last post: 63 days Last activity: 9 hours |
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| You know what would be perfecty to do with this info? Super Mario Space Adventure! I was actually making a hack with this kind of theme (thats why I was so interested in this info and asked someone to make me a block). With my first hack, SME (Super Mario Era), when bowser is beaten, he will fly to the moon and thats where the second story begins. It will probably be called SME2: BMB (Bowser's Moon Base) or something like that. Thats why low gravity is essential for my next project (which wont be for awhile). |
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Alastor the Stylish Hey! I made a cool game! It's called "I poisoned half the food, so if you eat you might die!" Have a taco. Level: 114 Posts: 2423/7620 EXP: 16258468 For next: 51099 Since: 03-15-04 From: Oregon, US Since last post: 2 hours Last activity: 2 hours |
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Have you played Paper Mario 2? Make him team up with Grodus while at the moon  |
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rubixcuber Red Goomba Level: 12 Posts: 7/46 EXP: 6125 For next: 1796 Since: 10-13-04 From: St. Louis, MO USA Since last post: 331 days Last activity: 293 days |
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| Actually, the space adventure wouldnt be too hard, the 79A5D7 to 79A2D7 modification I mentioned does almost that. Even though there's no gravity, you can control your direction by holding th jump button. It's not perfect though and with some work you could probably achieve a better version of it. |
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| Acmlm's Board - I2 Archive - Super Mario World hacking - Found code for gravity and jumping. |
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