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Author Topic: Open Golden Sun: Open source recreation of the Golden Sun engine  (Read 58360 times)
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« on: December 15, 2014, 04:46:04 PM »

Hi all,

I'm posting a link to my channel where I'm recreating the GBA Golden Sun engine.

OpenGoldenSun Channel

Right now I have these videos up that show where I'm at with the engine.


It's currently not open source but the intent will be to open source it when it's reached an acceptable point. Subscribe if you'd like, I'll attempt to keep this post updated as I go. This has been made from the ground up with no RPG maker or anything.

I've described more details about the engine in this reddit post.

Let me know your thoughts.
« Last Edit: October 28, 2015, 09:29:22 PM by OpenGoldenSun » Logged

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« Reply #1 on: December 15, 2014, 05:23:26 PM »

Thanks for posting this!
I was thinking about maybe some day creating an open-sourced platform from the ground up based off of Golden Sun's code for people to create Golden Sun-like games... but I wasn't sure if I'd ever go as far as copying all the maps. (I was thinking more about a collection of code-based resources.) However, if it turns out your project is the perfect replacement (which it sounds like it is.) Then I won't need to...
Since I (and Salanewt) have documented quite a bit about GS2, I guess I'll eventually look into seeing how your project is organized compared to it, and check for consistencies as well. :)
« Last Edit: December 15, 2014, 05:30:40 PM by Fox » Logged

Golden Sun Docs: Broken Seal - The Lost Age - Dark Dawn | Mario Sports Docs: Mario Golf & Mario Tennis | Misc. Docs
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« Reply #2 on: December 16, 2014, 12:21:21 AM »

Open Golden Sun! Just like "Openmw"! Like a dream come true!
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« Reply #3 on: December 16, 2014, 01:38:15 AM »

I would pay good money for a decent RPG maker. I'm serious, too.

Though, for my own purposes, I would need 3D support and a Z-Axis to create something with an overworld style similar to Grandia. 3D Environments with 2D sprites. https://www.youtube.com/watch?v=sUUHBFN3QL4

I'd probably need for the battle system to be modifiable, so I could make something similar to Grandia, too.

Why am I basically asking for an Open-Source Grandia-maker on a Golden Sun Forum? >_<

I guess a guy could dream when wanting to make his own original RPG with inspired mechanics...
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« Reply #4 on: December 16, 2014, 02:09:41 AM »

Question - how editable will this be?  Would we be able to add additional stats, so as to give psynergy stat support?  How much control will we have over things like critical hit rates, unleash rates, and damage formulas?
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« Reply #5 on: December 16, 2014, 03:06:38 AM »

I would pay good money for a decent RPG maker. I'm serious, too.

Though, for my own purposes, I would need 3D support and a Z-Axis to create something with an overworld style similar to Grandia. 3D Environments with 2D sprites. https://www.youtube.com/watch?v=sUUHBFN3QL4

I'd probably need for the battle system to be modifiable, so I could make something similar to Grandia, too.

Why am I basically asking for an Open-Source Grandia-maker on a Golden Sun Forum? >_<

I guess a guy could dream when wanting to make his own original RPG with inspired mechanics...

I'm really not the best person to do something like that and I really wouldn't have the time, sorry (also you can't afford me  Happy ). I'm really just making this because they're my favorite games of all time.

Question - how editable will this be?  Would we be able to add additional stats, so as to give psynergy stat support?  How much control will we have over things like critical hit rates, unleash rates, and damage formulas?

You would be able to do whatever you want in theory. I will most likely create all the damage and stat calculations off what the game currently does and then modify from there.
« Last Edit: December 16, 2014, 03:08:28 AM by OpenGoldenSun » Logged

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« Reply #6 on: December 16, 2014, 03:53:36 AM »

@3D support: Is it even possible to take Golden Sun's 2D maps and make them rotatable as if they were 3D? Even if it was a slight rotation like an earthquake. (Possibly using the height map in part of the equation of-course.)
It may or may not be tricky/ugly/feasible, but still, it was an idea.... You'd use sin and cos for sure. But just in-case, has anyone seen anybody try something like that?
@Ugly: Imagine how houses would work, you'd need to fix the sides and back, obviously.

Quote
I'm really not the best person to do something like that
Just to make sure, does some of that time you would need have to go into figuring out how to go about it, or would you already have an idea, but the work to do it is difficult?
« Last Edit: December 16, 2014, 04:23:28 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...

Sometimes I like to compare apples to oranges. (Figuratively) ... They are both fruits, but which one would you eat more? (If taken literally, I'd probably choose apples.)
Maybe it is over-analyzing, but it doesn't mean the information is useless.
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« Reply #7 on: December 17, 2014, 02:09:25 PM »

Will we be able to manage things such as accuracy, evasion, and move priority?  Would we be capable of handling Criticals and Unleashes as separate entities, or would they be folded into a single thing like they were in Dark Dawn?
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« Reply #8 on: December 22, 2014, 10:43:58 PM »

I like how you guys are already trying to hack an un-built project.  Happy

@Rolina, the thing with coding something from the ground up is, you can do anything you want.

@Fox, I'm really just going to focus on rebuilding the GBA engine as-is. I'm sure adding a pseudo 3D affect would be cool, but I'm not looking to reinvent the style of the game.
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« Reply #9 on: December 22, 2014, 11:03:11 PM »

Looks sweet, you have the full attention of all members of this board!!!

This is the greatest news seen on this site in years!! I'd almost gave up on the idea of a golden sun Fan game.

WOW! Happy Joy
« Last Edit: December 22, 2014, 11:08:49 PM by MaxiPower » Logged
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« Reply #10 on: December 23, 2014, 12:08:03 AM »

It's looking pretty convincing so far, I'm impressed with how well you've replicated the game's engine.
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« Reply #11 on: December 23, 2014, 12:30:28 AM »

Looks sweet, you have the full attention of all members of this board!!!

This is the greatest news seen on this site in years!! I'd almost gave up on the idea of a golden sun Fan game.

WOW! Happy Joy

Thanks! I look forward to seeing where this goes.

It's looking pretty convincing so far, I'm impressed with how well you've replicated the game's engine.

I take that as a huge compliment, especially coming from you, so thank-you.
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« Reply #12 on: December 23, 2014, 01:02:38 PM »

Quote
@Fox, I'm really just going to focus on rebuilding the GBA engine as-is. I'm sure adding a pseudo 3D affect would be cool, but I'm not looking to reinvent the style of the game.
Okay, fair enough. Sticking to just the Golden Sun engine, is probably what I would have done as the focus point as well? ; And then when the GBA project would be complete, perhaps look to see what Dark Dawn had to offer, and implement optional things from there, but I dunno.

Looking good so far. Have you worked on the battle system yet?


Oh and...
Quote
@Rolina, the thing with coding something from the ground up is, you can do anything you want.
Well, you are still limited by the programming language and hardware, but that's little to be concerned about considering how limited hacking the GBA was. (It's like hacking the GBA is only worth it for collecting data? That, and maybe translations/difficulty hacks, anything minor.)
« Last Edit: December 23, 2014, 01:17:13 PM 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...

Sometimes I like to compare apples to oranges. (Figuratively) ... They are both fruits, but which one would you eat more? (If taken literally, I'd probably choose apples.)
Maybe it is over-analyzing, but it doesn't mean the information is useless.
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« Reply #13 on: December 23, 2014, 06:43:46 PM »

Looking good so far. Have you worked on the battle system yet?

Not yet, I think that will come later. Sorry, I know it's one of the more interesting parts but it's also one of the hardest. I'm comfortable with the structure I've built for doing field psynergy. While doing Move & Growth I think I was able to come up with a pretty decent structure so now it's just a matter of finishing up a bunch of the field psynergies. I'll probably focus on a couple more field related items such as: jumping, pushing, and cliff-edge sliding.

Once I'm comfortable with those items I'll move onto to either the world map or battle system. Once those are in a good spot, I'll probably do a major code refactor.

Here is a screenshot of the Class View for the engine (large image), this is completely subject to change and I'm posting this mostly because you seemed interested: http://i.imgur.com/xqeGWVm.png
« Last Edit: December 23, 2014, 07:01:17 PM by OpenGoldenSun » Logged

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« Reply #14 on: December 23, 2014, 08:59:44 PM »

That's fine. As a small hint, though, I believe the game uses two angle values that can be found at addresses 0x02030034 and 0x02030036. So I don't imagine that setting up the base battle system would be too difficult (Basically skin and bones), but actually making it a playable feature with properly working animations/etc might take a whole lot more work.

The World Map should be pretty easy...

That image looks great!  Keep up the good work.
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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...

Sometimes I like to compare apples to oranges. (Figuratively) ... They are both fruits, but which one would you eat more? (If taken literally, I'd probably choose apples.)
Maybe it is over-analyzing, but it doesn't mean the information is useless.
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« Reply #15 on: December 24, 2014, 11:17:38 PM »

Very nice work! I am very impressed!  Happy

Looks like you are using xna, right? C# is a lovely language.
That's a very hard and professional work and you have already done lot of stuff.
Can't wait to see the source!!  Happy
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« Reply #16 on: December 27, 2014, 12:25:08 AM »

I'd love to see some behind the scenes stuff, so as to better see what bit of code corresponds to what.  Or, alternatively, if there's a UI functionality built into it like with Atrius' Editor, I'd like to see that.
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« Reply #17 on: December 27, 2014, 01:53:28 AM »

Same.  I'd like to know how the map data is done, myself. What is this TileAndHexUtilityForm?

-Is it just 16x16 tiles without the four split 8x8 tiles like how the game works?
-Are the tiles done in 16bpp? Without an indexed pixel format?
« Last Edit: December 27, 2014, 02:14:06 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...

Sometimes I like to compare apples to oranges. (Figuratively) ... They are both fruits, but which one would you eat more? (If taken literally, I'd probably choose apples.)
Maybe it is over-analyzing, but it doesn't mean the information is useless.
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« Reply #18 on: December 27, 2014, 06:38:38 PM »

I'm interested in how the field effects are done.  I'd love to add more (say, fireball functionality from DD), so seeing how Move and Growth were handled would be kinda neat.
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« Reply #19 on: December 27, 2014, 08:08:44 PM »

I imagine the basics of field effects are simple enough to understand... but as for the entirety, probably plenty of work to implement? (You have to also remember the less obvious things like how Douse will do snowflakes in cold places.)

-You generate the graphics in front of the character.
Something like this... (If assuming facing right is a 0 degree angle.)
Utility_x = PC_x + (distance * cos(PC_angle))
Utility_y = PC_y + (distance * sin(PC_angle))

-Interacting with objects is likely tile based, so x/16 and y/16  (Or was it /8 each?) or something like that... And different utilities measure out different distances in tiles.
Frost could work 1 tile away, Move could work 2 tiles away, for example.
« Last Edit: December 27, 2014, 08:16:51 PM 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...

Sometimes I like to compare apples to oranges. (Figuratively) ... They are both fruits, but which one would you eat more? (If taken literally, I'd probably choose apples.)
Maybe it is over-analyzing, but it doesn't mean the information is useless.
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December 24, 2019, 09:33:09 PM
Fox: Even just plain Editor work can make some difference. = At least these forums are indexed on the Search engine. I was also curious about whether to um... go through all the topics on these forums and take all the important stuff out/placed into a folder for a bit of organization. Would be a bonus since if something ever happened to this forum, or if we ever wanted to start afresh again, it wouldn't be that difficult to do so.
December 24, 2019, 09:23:03 PM
Fox: One thing is for sure. This place has become completely dead. (Mostly because of Discord.)  = I don't think much will happen with this forum unless I, Salanewt, or someone else does a thing.
December 24, 2019, 09:18:05 PM
Fox: Probably not?
December 24, 2019, 06:51:08 PM
Luna_blade: I suppose this is the last Christmas of this forum? 
December 24, 2019, 06:50:51 PM
Luna_blade: Yay thanks for the coins
December 19, 2019, 04:39:45 AM
Fox: Okay, another thought... "gsmagic" could be the code name/project name... and "Golden Sun Magic" could be the more formal official name... (As in using both names.)  -  I still need to look into these other games as well... so who knows if it could be better to call it Camelot Magic if those should ever be supported to a decent standard.  Would probably be a long time from now, though. As I can be pretty lazy.
December 18, 2019, 10:01:39 PM
Foreclosure: gsmagic is fine
December 17, 2019, 05:44:32 PM
Fox: Also. I call my program "gsmagic" and not "GSMagic" =P (Not asking for correction/I being silly)... Had to call it something, so picked something short.  Maybe I should rename it to Golden Sun Magic later. *shrug*
December 17, 2019, 05:35:04 PM
Fox: (And "Golden Sun" instead of "GS" to reduce confusion that would likely not be there anyway... when "Golden Sun" doesn't take up much space to start with. (Imagine being new and thinking GS meant GameShark, or some other oddity. Ew.)) - All just thoughts...I'm still going with most of this not mattering that much, though.
December 17, 2019, 05:12:55 PM
Fox: "Misc. GS Hacking" = That name looks odd, so I'd probably just go with "Golden Sun Hacking"
December 17, 2019, 05:08:05 PM
Fox: I tempted to also suggest the Editors can go in the first category. Since the Editor is the reason this place exists in the first place. (I think.)
December 17, 2019, 04:53:19 PM
Fox: (combined = Not meant to be taken literally... but rather.... to generalize things more, since it apparently looks like we don't need the extra space no one is using.)
December 17, 2019, 04:48:49 PM
Fox: Worse still... we've only used those for Golden Sun content.... and there's not much there.
December 17, 2019, 04:45:53 PM
Fox: E.g. Maybe everything in "Assets & Discussion" could be combined with "Creative Works".... I don't feel like sound and art apply to general hacking anyway... that only comes into play when you have tools to insert them.
December 17, 2019, 04:40:26 PM
Fox: categories and/or forums
December 17, 2019, 04:36:48 PM
Fox: Everything else seems to be about right, though. Perhaps some categories could be combined(?), but doesn't really matter that much.
December 17, 2019, 04:33:03 PM
Fox: (I still think The Community section fits best at the bottom. =P)
December 15, 2019, 05:10:04 PM
Salanewt: Heya! I'm planning to get the demo up today, but if you can't wait then it's already available on the Discord.
December 15, 2019, 04:12:27 AM
Fox: (Then sell the badges on the Trade Center for a very high price... and give a lot of active people coins to buy them with, so they can basically transfer the coins to me if they want something... Gosh I could be a naughty hoarder. =P)
December 15, 2019, 04:06:19 AM
Fox: I'd buy up all the stock for each item too... but man... I think I'm too lazy for that. =P
December 15, 2019, 04:01:24 AM
Fox: There we go. That should be all of them.
December 15, 2019, 03:25:32 AM
Fox: Duplicates will still show up as separate entries on the profile as well. Interestingly enough.
December 15, 2019, 03:18:25 AM
Fox: (Well, one of each badge, at least.)
December 15, 2019, 03:18:08 AM
Fox: Now I can buy up the whole shop. :3
December 14, 2019, 08:58:08 PM
Foreclosure: Guys, I really want to see the AI overhaul demo... please fast! :D hehehe
December 14, 2019, 08:57:33 PM
Foreclosure: I sent 2 thousand coins for ya bro
December 14, 2019, 01:31:38 AM
Fox: In my opinion, even with the old system where it was set up so you could only coin people once per hour... I think it would have been far more fair if we could have also coined ourselves hourly.... since people have favoritism for certain people.... I feel like that could mitigate it some. At least to get badges that people care about the most. - Unlimited coining sounds like a step further than that, which is interesting... :)
December 14, 2019, 01:12:00 AM
Fox: Do note, that people can't coin themselves... but I feel if you got someone who's willing to transfer the coins you give them back to you... it is as though you have that coin option on yourself anyway....
December 14, 2019, 01:07:29 AM
Fox: Go to any of my forum posts, look for where it says Coins... under that, you'll see [increase] , clicking that will give me coins. You won't lose anything for doing so. Click it as much as you like... Under that, you should see Send Money (a faster option if you got the coins). Use that link to transfer your coins to me of any amount you want. (e.g. Put in 2000, means I get 2000, you lose 2000... but if I've already given you 2000+, you don't really have to see it as actually losing anything.)
December 13, 2019, 03:42:39 PM
Foreclosure: How do I return favor, sir?

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