Undocumented autoscroller! Horizontal AND vertical!

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05-02-24 11:21 AM

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Main - SMW Hacking - Undocumented autoscroller! Horizontal AND vertical!

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joe

Posted on 04-08-07 03:21 AM (rev. 2 of 04-12-07 04:49 AM)

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Hello all. I was looking at the unused sprites and noticed that two were within the range of the special commands. I picked one - EC - and started to experiment.

I still have trouble believing Nintendo left this out on purpose.

This is an autoscroller that starts with a horizontal layer 1 level, then switches to a vertical layer 2 section.

I put up a MWL file on my friend's server:

http://67.183.146.143/SpriteEC.mwl

Try it out. (Make sure the number of screens is set to 3.)

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Lordlazer

Posted on 04-08-07 03:47 AM

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Since LM doesn't work on my OS I'll ask, are you saying that the level will scroll horizontally from screen 1 through 2 and on the 3rd screen it will scroll vertically? Could you create an AVI or something to show?

joe

Posted on 04-08-07 04:07 AM

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An AVI? Only if you're willing to download a 563-megabyte monster! (And I'll have to upload it!)

How about an animated GIF?

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qwwq

Posted on 04-08-07 04:21 AM

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Posted by Lordlazer
Since LM doesn't work on my OS...

why doesn't it work? do you got Macintosh or linux or somethin?

NightKev

Posted on 04-08-07 05:07 AM

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Posted by qwwq
Why doesn't it work? Do you ~~got~~ have Macintosh or Linux or something?

Fix'd.

Posted by joe
An AVI? Only if you're willing to download a 563-megabyte monster! (And I'll have to upload it!)

How about an animated GIF?

Why would it be so huge?

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Ninetales

Posted on 04-08-07 05:12 AM (rev. 3 of 04-08-07 05:25 AM)

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Or you could, you know, make an IPS file for anyone to use.

Go to Level 105, just like joe's similar IPS below.

Also, here are some pictures of the level:
Layer 2
Both layers 1 and 2. Layer 1 only actually consists of that one platform.

16BT

Posted on 04-08-07 05:19 AM

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Posted by joe
An AVI? Only if you're willing to download a 563-megabyte monster! (And I'll have to upload it!)

How about an animated GIF?

Why would it be so huge?

It could be uncompressed.

joe

Posted on 04-08-07 05:23 AM (rev. 3 of 04-12-07 04:49 AM)

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The size would be mainly due to the compression (or lack thereof).

An animated GIF and an IPS:
http://67.183.146.143/DemoEC.gif
http://67.183.146.143/SpriteEC.ips (Go to Yoshi's Island 1)
EDIT: Or use Ninetales'

Lordlazer, to answer your question on scrolling:
This sprite basically scrolls through layer 1 like a normal horizontal scroll, except on the last screen which should have no layer 1 objects. When it reaches here, layer 2 becomes solid and scrolls in. Then the horizontal scroll stops, layer 1 disappears, and the vertical scroll starts. Basically, yes.

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Lordlazer

Posted on 04-08-07 05:36 AM (rev. 2 of 04-08-07 05:39 AM)

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Posted by joe
The size would be mainly due to the compression (or lack thereof).

An animated GIF and an IPS:
http://24.16.242.145/DemoEC.gif
http://24.16.242.145/SpriteEC.ips (Go to Yoshi's Island 1)
EDIT: Or use Ninetales'

Lordlazer, to answer your question on scrolling:
This sprite basically scrolls through layer 1 like a normal horizontal scroll, except on the last screen which should have no layer 1 objects. When it reaches here, layer 2 becomes solid and scrolls in. Then the horizontal scroll stops, layer 1 disappears, and the vertical scroll starts. Basically, yes.

Thanks a lot for clarifying that for me and providing a GIF file. <3

Posted by qwwq
Posted by Lordlazer
Since LM doesn't work on my OS...

why doesn't it work? do you got Macintosh or linux or somethin?

Mac

Edit: My notebook is a Mac and my PC's CPU died (or rather the fan died and it slow broiled due to the other 12 fans...LOL I was even able to shut it down properly...), so I only have access to my Mac until I move to my sisters where I can steal my nephew's PC (notebook) for when I need to use Windows only programs.

Xkeeper

Posted on 04-08-07 05:39 AM

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Holy shit this is awesome in a can.

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I dealt with it.

NightKev

Posted on 04-08-07 05:42 AM (rev. 2 of 04-08-07 05:43 AM)

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It's interesting how SMW has existed for 4+(right?) years and yet someone just now discovers this. Hooray! (or something)

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Phoenix Yoshi

Posted on 04-08-07 05:44 AM

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Posted by Xkeeper
Holy shit this is awesome in a can.

Quoted for truth.

I played the demo, and I have to say, THIS IS FREAKING AWESOME! I guess this means we're one step closer to getting bigger levels, huh? One needs only manipulate this...

Hey, that makes me wonder... Could there be an unused sprite that makes the level go from vertical to horizontal? Hey, if there's one to make it go from horizontal to vertical, there's GOT to be one to make it go the other way around, right?

NightKev

Posted on 04-08-07 05:46 AM

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Hm, we could double the level length! He said there were two (or more?) sprites he found but he only tested one, so maybe (one of) the other(s) does just that!

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theclaw

Posted on 04-08-07 05:46 AM

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Um... 1990 in Japan.

Now we just need to convince one of the resident "super" ROM hackers here to implement a left-scrolling autoscroll.

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joe

Posted on 04-08-07 06:04 AM

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I probably should have mentioned this before, but if you change the level mode in LM to 07, you can edit the layer 2 data.

Back to experimenting!

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HyperHacker

Posted on 04-08-07 06:57 AM

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Omgwtf? That's awesome. You can just switch from horizontal to vertical mid-level like that?

NightKev

Posted on 04-08-07 07:30 AM

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Posted by HyperHacker
Omgwtf? That's awesome. You can just switch from horizontal to vertical mid-level like that?

No, this is all an elaborate ruse designed to lure innocent people to their DOOM!!!

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Forte.EXE

Posted on 04-08-07 09:08 AM (rev. 2 of 04-08-07 09:16 AM)

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*McMahon voice* Well, well, well... looks like a small discovery here.

*/McMahon voice* Hmm, maybe I can use this to my advantage... need to do a test first...

EDIT: It seems Unused Sprite F1 does the same thing but isn't an Autoscroller...

BMF54123

Posted on 04-08-07 11:44 AM

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Sprite EB also seems to be an unused scroller. Setting it at Y=0 with Extra Info=0 causes layer 2 to endlessly fall straight down very quickly, while Y=0 with Extra Info=1 causes it to endlessly rise upwards. Pretty useless, since layer 2 wraps around and shows garbage. However, setting it to Y=1 and Extra Info=0 activates a completely different, pre-defined scroller...it constantly moves to the right, occasionally slowing down, while layer 2 bobs up and down at varying heights. An unused cave level scroller, perhaps?

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Smallhacker

Posted on 04-08-07 12:55 PM

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...wow.

It seems like you hit one of the very few veins of pure pwnium left in the caves of Super Mario World.

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Main - SMW Hacking - Undocumented autoscroller! Horizontal AND vertical!

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