Homebrew osu!3DS - A homebrew osu! port for the Nintendo 3DS.

ItsKaitlyn03 · Jun 17, 2018

Hey there, I've been programming this thing for over 6 months and finally got something "notable" working!

Usage Guide:
1. Compile this C# code https://gist.github.com/Cyuubi/af024aab0bf8f92ad6ad322d350c1631
2. Take your beatmap .osu file and remove everything except for the stuff below [HitObjects] (and also remove [HitObjects] its self!)
3. Save this file and call it BeatmapData.csv and move it to where you compiled that C# at
4. Open a Command Prompt (or equivalent) and CD to where you compiled the C# code at
5. Run the following command "<CompiledFileName> > BeatmapCode.txt" (make sure to replace "<CompiledFileName>" with the file name of the EXE name!)
6. Install devkitPro so we can build this homebrew!
7. Clone this repo somewhere https://github.com/Cyuubi/osu-3DS
8. Edit main.c in the source folder and replace line "// Beatmap C data" with the contents of BeatmapCode.txt
9. Create 2 folders inside the cloned osu-3DS folder called "romfs" and inside the romfs folder make a folder inside it called "default", this is where our skin will be at
10. Copy an entire skin that contains at least these 4 files approachcircle.png, cursor.png, hitcircle.png and hitcircleoverlay.png to the "default" folder inside the "romfs" folder
11. Open Command Prompt (or equivalent) and CD to the cloned repo and run "make" there should be no errors at all
12. Copy osu-3DS.3dsx to your 3DS (which has homebrew) SD card or run this with Citra
13. Enjoy?

Currently this is not for the average user and its still very WIP as theres no beatmap parsing basically and no audio output but hopefully soon I can add beatmap parsing.
Have fun!

ItsKaitlyn03 · Jun 17, 2018

Some proof:

Nomi20 · Jun 17, 2018

This is very cool! Keep up the great work!

MegaV2 · Jun 18, 2018

I've been waiting for this since the goddamn NDS homebrew days
Keep up the good work man :bow:

tomGER · Jun 18, 2018

This is really impressive, good job ^^

Jaspy · Jun 18, 2018

Really cool so far! Never thought I'd see osu on the 3DS somehow, but now that someone made it, it makes a lot more sense now that i think about it.

Rubedo · Jun 19, 2018

I just want to say I am INFINITELY EXCITED for this! I've been dreaming of this for YEARS!
As long as it'll eventually be able to load beatmaps (I assume we'll just toss them in a folder on the SD card and it'll load from there?) and have audio and some level of graphics for the notes, I'll be happy. Doesn't need all the crazy bells and whistles like background videos and custom skins. Though being able to load the background image would be a nice plus.

Xexyz · Jun 19, 2018

Can't wait to farm pp on the 3ds

ItsKaitlyn03 · Jun 19, 2018

Rubedo said:
I just want to say I am INFINITELY EXCITED for this! I've been dreaming of this for YEARS!
As long as it'll eventually be able to load beatmaps (I assume we'll just toss them in a folder on the SD card and it'll load from there?) and have audio and some level of graphics for the notes, I'll be happy. Doesn't need all the crazy bells and whistles like background videos and custom skins. Though being able to load the background image would be a nice plus.

It will have an online mode eventually, also.

Rubedo · Jun 19, 2018

ctrninja said:
It will have an online mode eventually, also.

Could you make online optional? I don't want to have to have the game online just to save my high scores locally.

ItsKaitlyn03 · Jun 19, 2018

Rubedo said:
Could you make online optional? I don't want to have to have the game online just to save my high scores locally.

Online will be optional, online will also have anti-cheat using a mixture of your MAC address and Device ID (hashed in SHA256 or probably MD5 on the client)

Rubedo · Jun 19, 2018

ctrninja said:
Online will be optional, online will also have anti-cheat using a mixture of your MAC address and Device ID (hashed in SHA256 or probably MD5 on the client)

Alright, cool. It always bugged me how you basically can't play offline on the PC version of Osu.

q_q · Jun 19, 2018

pepperikka bro ur getting ur hopes too high

ItsKaitlyn03 · Jun 19, 2018

sudoku173 said:
pepperikka bro ur getting ur hopes too high

Wym?

q_q · Jun 19, 2018

ctrninja said:
Wym?

you're planning online support and many other things yet you don't have working audio (which, in order to have a non-sucking rhythm game should be implemented before everything and notes should be synced with this)

not to mention having a proper playfield set up with proper scaling

ItsKaitlyn03 · Jun 19, 2018

sudoku173 said:
you're planning online support and many other things yet you don't have working audio (which, in order to have a non-sucking rhythm game should be implemented before everything and notes should be synced with this)

not to mention having a proper playfield set up with proper scaling

I've been busy porting shit to C++.

Dr.Hacknik · Jun 19, 2018

But can it run Crysis?

FreezingRedwood · Jun 21, 2018

Code:

beatmapFile = open("BeatmapData.csv", "r")
outFile = open("BeatmapCode.txt", "w+")
lines = beatmapFile.read().split("\n")
lines.pop() #there's a newline at the end to compensate for.
for LineData in lines:
    LineData = LineData.split(',')
    outFile.write("hitcircle_DrawHitCircleAndApproach(Resize(" + LineData[0] + "), Resize(" + LineData[1] + "), 1, " + LineData[2] + ", currentTime, 10);\n")
beatmapFile.close()
outFile.close()

I just made this little code snippet in like, ten minutes to replace that C# compilation - it'll save linux users a little bit of time. Just glazing over it, it seems to work, but if there are problems, just use what ctrninja provided. Be sure to replace the 4 spaces in lines 6,7 with tabs. Save it as however you want, as long as it has the .py extension. ex. osuScript.py

(For people who have python already installed, this should spare them step 1, and it'll change steps 4 and 5)
For step 5, just put the BeatmapData.csv in the same folder as this python file, then execute the command "python osuScript.py" (or replace osuScript.py with whatever you called it) in cmd or terminal, depending on what os you're on.

ItsKaitlyn03 · Jun 22, 2018

FreezingRedwood said:
Code:

beatmapFile = open("BeatmapData.csv", "r") outFile = open("BeatmapCode.txt", "w+") lines = beatmapFile.read().split("\n") lines.pop() #there's a newline at the end to compensate for. for LineData in lines: LineData = LineData.split(',') outFile.write("hitcircle_DrawHitCircleAndApproach(Resize(" + LineData[0] + "), Resize(" + LineData[1] + "), 1, " + LineData[2] + ", currentTime, 10);\n") beatmapFile.close() outFile.close()

I just made this little code snippet in like, ten minutes to replace that C# compilation - it'll save linux users a little bit of time. Just glazing over it, it seems to work, but if there are problems, just use what ctrninja provided. Be sure to replace the 4 spaces in lines 6,7 with tabs. Save it as however you want, as long as it has the .py extension. ex. osuScript.py

(For people who have python already installed, this should spare them step 1, and it'll change steps 4 and 5)
For step 5, just put the BeatmapData.csv in the same folder as this python file, then execute the command "python osuScript.py" (or replace osuScript.py with whatever you called it) in cmd or terminal, depending on what os you're on.

Might wanna update that now, osu!3DS is C++ now.

FreezingRedwood · Jun 22, 2018

The python code produces the same output of the C# code (which only serves to reformat some data, if I understand) - I just programmed it in a different language to make it easier for myself and others on other platforms (I have devkitpro on my linux machine, and I haven't set up Mono to compile C#). If you make some modification in how you're generating the BeatmapCode.txt, then the python code'll need to be updated.

In any case, thanks for your work! I look forward to seeing how this project progresses.

Homebrew osu!3DS - A homebrew osu! port for the Nintendo 3DS.

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