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Author Topic: The Magic River  (Read 4776 times)
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« on: October 05, 2017, 06:43:13 PM »

https://www.twitch.tv/videos/179942723

So this is a thing.

Frostfx made this convenient image to help explain the glitch: https://images-ext-1.discordapp.net/external/1t7y1yv3glyOzJNRFdQFPmDmP5OwcqooThpMibEnCCE/https/i.imgur.com/mo7Dg33.jpg
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« Reply #1 on: October 06, 2017, 12:06:52 AM »

Not exactly a "river," if going by the graphics, but that looks amazing!

Happy
Alex  Continental shelves are shifting!  And in an unexpected way, no kidding!

I feel like I want to call it The Magic Roundabout. (Referencing a UK cartoon, I think.) ... (And also secretly references something I was part of on RuneScape years ago. :P A clan I joined was named Skilling Central, and they changed their name to The Magic Roundabout, eventually, the clan "died", and owner moved on to another clan: The Round Table. (King Arthur reference, I assume.) I also followed, and that clan is still here today... Though, I haven't been on RS much lately.... I do want to eventually get back to it, but I was planning to hold off until AT LEAST the release of the bank rework. :/ )

---

Seems to be a 16-pixel margin? 0x1F00-0x1F0F

Map when not scaled is 0x2000px x 0x2000px, I think... but with the scaling, likely doubled... (Referring to current x and y location, since the top of the screen is shorter/bottom is longer.)... so 0x1F00 being right under the half way mark is interesting... (I feel like some rounding thing could be going on... like adding 1 when a number is negative, but I have no idea. Can probably look into it, though. Expecting it to be as simple as a breakpoint write on tilemap ram data. *crosses fingers*)


But first:  Going left/right with Map view open... (using auto-update).... And I'm not sure I understand this...  (Attachement... the column in the middle/at the bottom... when I walked left.) Did not need an encounter to see this... (But I imagine if it is the same as the glitch above.. then you probably would need one to "abuse" it?)
(Also see the same "flickering" on the left side when going right. (First column in map view.))

Almost forgot:  I should test it without messing up the flags... sso this is with messing up storybook flags.... in case it doesn't happen in cannon.


* otheraxisgltich.png (141.44 KB, 840x792 - viewed 575 times.)

* otheraxisgltich.png (245.23 KB, 1680x792 - viewed 560 times.)
« Last Edit: October 06, 2017, 01:12:09 AM by Fox » Logged

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« Reply #2 on: October 07, 2017, 10:44:00 PM »

He's correct about the map being split up, but the sections are 256x256 pixels, or 16x16 tiles that are 16x16px.  I don't know what's happening with this glitch beyond that.


Edit:
FYI there's a full rip of TLA's world map as stored in the game data (except some tilesets are incorrect) available here (8192x8192px, 10.8MB)

I could understand why the graphical glitch might happen because of how the graphics rendering is optimized (see Fox's post above), but the fact that the collisions are incorrect too baffles me.
« Last Edit: October 07, 2017, 11:30:04 PM by Atrius » Logged

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« Reply #3 on: October 08, 2017, 06:45:15 AM »

@FYI: That's cool, but a lot of those tiles are incorrect. (Since the tileset is switched.) ... Um? Not sure why the link sometimes doesn't work? Says it contains errors. Might be due to memory, though.

Anyway: From gsmagic (At least my version.):  ...  https://i.imgur.com/7zd1ibu.jpg (Prox/Mars Lighthouse area.... Gaia Falls... Snow areas... etc.)
Looks like I got some tiles wrong! (I lack water where it is needed.)  Thank you for posting that link!!
(I think I might know why.....) Fixed: https://i.imgur.com/mRzaKyi.jpg (And yes, some of the water tiles are snow in the second huge segment = That is correct. It'll look like water when you're off those tiles, though.)

I know there's a collision tileset (Just for World Map.),... so isn't the indexes that are used for graphics also used for that tileset too? So that would kind of make sense... However, I kind of forgot what I researched a long time ago, so....

World Map tilemap is pasted at 02020000. (Instead of 02010000 as normal maps do.) - 4 square maps are loaded at a time.
zzyyxxxx
zz = Can effect the tileset used.
yy = Event ID
xxxx = Graphical index , but also collision index?(Not confirmed?) (World Map only?) (May not necessarily be 16-bit, but for example...)


---
Update:  Been too lazy to put that breakpoint in. :/ (It's possible I may even have the function already documented, even if I don't have its contents documented.)
« Last Edit: October 08, 2017, 09:01:42 AM by Fox » Logged

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Remember kids! Before you go on that interview, remember to wash your hands in teawater! *Coughs on hand* (Excuse me, I just coughed up a little teawater, so they're still clean!) You wouldn't want that hiring manager to be unimpressed.

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« Reply #4 on: October 13, 2017, 08:49:37 PM »

Thanks for the map Atrius. Having explored that area using the first flight cutscene glitch its really cool to actually see what is there :)

But your map also reminded me that there is another point in the game where the overworld is updated - after you fix the boat and set Briggs free.

Getting an encounter with y-coordinate as indicated in the image will cause the bridge to un-fix itself (EDIT: its actually way more lenient, there's a large band of y values than work south of where I am standing). I can't see any other errors caused in this occurrence of the glitch. Of course, opening the menu and closing it again will fix the bridge - as illustrated in this gif: https://gyazo.com/01fe839247061ad159edd296e3fba40b

I guess then the next question is this - when Venus lighthouse is lit at the start of the game, are those cutscenes happening on the copy of gondowan far to the west of the world map? Or is it happening within the world map but having tiles updated?


* 6d010b3dbd81387d00350b3fc8b23162.png (280.36 KB, 722x486 - viewed 596 times.)
« Last Edit: October 13, 2017, 08:55:18 PM by Plexa » Logged
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« Reply #5 on: October 14, 2017, 09:30:04 AM »

Attachment: An image showing where a flag check is done, and how two map sections (side by side) are copied over. (For the Contigo area.)

In map code initialization....

Arguments: srcx, srcy, desx, desy
No size values or anything, so the whole square (16x16 tiles) should be "copied" over...  By putting a file number in the 03001448 list.

Calls a function that hasn't really been documented, but is in an expected area.

0802BD08

r6 = 02032640 = screen x
r7 = src position
r12 = 02032648 = screen y

to be continued?

---
Not sure where glitch occurs yet, but I now at least have something about this function in my doc.


* copytiles.png (12.78 KB, 605x412 - viewed 574 times.)
« Last Edit: October 14, 2017, 11:25:15 AM by Fox » Logged

Golden Sun Docs: Broken Seal - The Lost Age - Dark Dawn | Mario Sports Docs: Mario Golf & Mario Tennis | Misc. Docs
Refer to Yoshi's Lighthouse for any M&L hacking needs...

Remember kids! Before you go on that interview, remember to wash your hands in teawater! *Coughs on hand* (Excuse me, I just coughed up a little teawater, so they're still clean!) You wouldn't want that hiring manager to be unimpressed.

May the force be with you!
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August 22, 2019, 12:53:38 PM
Omx7: A shame that I only recently discovered this website. Hopefully, we see Golden Sun 4 in the near future.
August 15, 2019, 04:08:47 PM
Fox: Golden Sun Slacking Community = I like that, Misery! Perfect April Fools joke?
August 13, 2019, 02:37:11 AM
Salanewt: Oh hey Atrius, long time no see!
August 12, 2019, 11:37:45 PM
Fox: (Someone else discovered that, not me.)
August 12, 2019, 11:33:42 PM
Fox: So um. It looks like abilties in the class editor are being put back in as a byte for GS1?
August 12, 2019, 08:02:58 PM
Fox: Also, it seems most of us have moved to the Discord. In case if you were wondering where the forums activity went. Maybe come by and check it out. But it is just a suggestion, you don't have to.
August 12, 2019, 07:57:02 PM
Fox: I figured that was a possibility. If you are guesting, it is hard to know how frequently you check back. It's great to hear from you, though. :)   What have you been up to?  Is Forgotten Dreams still being worked on, or has that been cancelled? (I'd guess you don't have much time for it. It's been years since we've last heard about it.)
August 12, 2019, 12:48:12 AM
KingAmiti: Still great work Atrius :)
August 11, 2019, 06:45:03 PM
Atrius: This place was a HUGE part of my life, and even though I don't have the time that it really deserves to take care of it, I will love it forever, and never forget about it..
August 11, 2019, 05:16:34 PM
Atrius: If anyone wants to make a replacement site then go for it.  Although I plan to keep this place up for the foreseeable future, it isn't really maintained anymore.
August 11, 2019, 05:09:10 PM
Atrius: Sometimes he comes by and looks around without logging in.
August 08, 2019, 11:52:33 AM
Fox: Does Atrius still come here? He hasn't logged in since last year. Maybe it is time to create a replacement site so we can have our full encyclopedia... Then again, I'm too lazy. Especially to get all that done by myself. :/
July 06, 2019, 03:44:41 AM
Salanewt: Oh, yeah there isn't an animation overhaul for GS1 sadly.
July 03, 2019, 04:54:58 PM
ryancaesar12345: GS2 Animation Overhaul w/ Baseline  ips patch in golden sun 1?
July 03, 2019, 12:03:06 AM
Salanewt: There actually is a Jupiter revive... if you're using the Animation Overhaul patch. I think Caledor made a standalone patch for GS1 too, but you'd have to ask him.
July 02, 2019, 07:34:13 AM
Fox: So like... (just a thought)...  If we designed a script to compare times for speedrunning something... goalChance represents stability (I think?) ; If it is 100%, answer results in infinite, which means you can't have 100% stability. (Meaning you'd basically be skipping all item drops/etc.) 
July 02, 2019, 07:06:08 AM
Fox: (I still want to make sure the equation is correct, though... as it did include some guessing.)
July 02, 2019, 07:04:47 AM
Fox: Was thinking .... tosses = ln(1-goalChance) / ln(1-chance) = "chance" being a single-toss percentage probability (0.00 - 1.00) , goal chance being if you did more tosses...   So that's an interesting logarithm.  Just came up with it after some research/thinking... and could maybe be useful for general use.
June 25, 2019, 02:51:42 PM
ryancaesar12345: jupiter revive animation any?
June 24, 2019, 08:05:17 AM
Fox: Such a patch would mean you need to be careful with item drops, coins, exp, etc. Because those things would then no longer be an infinite supply.  Whether or not one uses it depends on what they want to do with it.

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