93 lines
4.4 KiB
Markdown
93 lines
4.4 KiB
Markdown
# [opsu!](http://itdelatrisu.github.io/opsu/)
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**opsu!** is an unofficial open-source client for the rhythm game
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[osu!](https://osu.ppy.sh/). It is written in Java using
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[Slick2D](http://slick.ninjacave.com/) and [LWJGL](http://lwjgl.org/),
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wrappers around the OpenGL and OpenAL libraries.
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opsu! runs on Windows, OS X, and Linux platforms.
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A [libGDX port](https://github.com/fluddokt/opsu) additionally supports Android
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devices.
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## Getting Started
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Precompiled binaries for opsu! can be found on the
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[releases](https://github.com/itdelatrisu/opsu/releases) page, with the latest
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builds at the top. APK releases can be found
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[here](https://github.com/fluddokt/opsu/releases).
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### Java Setup
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The Java Runtime Environment (JRE) must be installed in order to run opsu!.
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The download page is located [here](https://www.java.com/en/download/).
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### Beatmaps
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opsu! requires beatmaps to run, which are available for download on the
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[osu! website](https://osu.ppy.sh/p/beatmaplist) and mirror sites such as
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[osu!Mirror](https://osu.yas-online.net/) and [Bloodcat](http://bloodcat.com/osu/).
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Beatmaps can also be downloaded directly through opsu! in the downloads menu.
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If osu! is already installed, this application will attempt to load beatmaps
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directly from the osu! program folder. Otherwise, place beatmaps in the
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generated `Songs` folder or set the "BeatmapDirectory" value in the generated
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configuration file to the path of the root beatmap directory.
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Note that beatmaps are typically delivered as OSZ files. These can be extracted
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with any ZIP tool, and opsu! will automatically extract them into the beatmap
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folder if placed in the `SongPacks` directory.
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### First Run
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The "Music Offset" value will likely need to be adjusted when playing for the
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first time, or whenever hit objects are out of sync with the music. This and
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other game options can be accessed by clicking the "Other Options" button in
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the song menu.
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### Directory Structure
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The following files and folders will be created by opsu! as needed:
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* `.opsu.cfg`: The configuration file. Most (but not all) of the settings can
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be changed through the options menu.
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* `.opsu.db`: The beatmap cache database.
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* `.opsu_scores.db`: The scores database.
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* `.opsu.log`: The error log. All critical errors displayed in-game are also
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logged to this file, and other warnings not shown are logged as well.
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* `Songs/`: The beatmap directory (not used if an osu! installation is detected).
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The parser searches all of its subdirectories for .osu files to load.
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* `SongPacks/`: The beatmap pack directory. The unpacker extracts all .osz
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files within this directory to the beatmap directory.
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* `Skins/`: The skins directory. Each skin must be placed in a folder within
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this directory. Any game resource (in `res/`) can be skinned by placing a
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file with the same name in a skin folder. Skins can be selected in the
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options menu.
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* `Screenshots/`: The screenshot directory. Screenshots can be taken by
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pressing the F12 key.
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* `Replays/`: The replay directory. Replays of each completed game are saved
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as .osr files, and can be viewed at a later time or shared with others.
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* `ReplayImport/`: The replay import directory. The importer moves all .osr
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files within this directory to the replay directory and saves the scores in
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the scores database. Replays can be imported from osu! as well as opsu!.
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## Building
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opsu! is distributed as both a [Maven](https://maven.apache.org/) and
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[Gradle](https://gradle.org/) project.
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### Maven
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Maven builds are built to the `target` directory.
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* To run the project, execute the Maven goal `compile`.
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* To create a single executable jar, execute the Maven goal `package -Djar`.
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This will compile a jar to `target/opsu-${version}.jar` with the libraries,
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resources and natives packed inside the jar.
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### Gradle
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Gradle builds are built to the `build` directory.
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* To run the project, execute the Gradle task `run`.
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* To create a single executable jar, execute the Gradle task `jar`.
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This will compile a jar to `build/libs/opsu-${version}.jar` with the libraries,
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resources and natives packed inside the jar.
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## Credits
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This software was created by Jeffrey Han
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([@itdelatrisu](https://github.com/itdelatrisu/)). All game concepts and
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designs are based on work by osu! developer Dean Herbert. Other credits can
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be found [here](CREDITS.md).
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## License
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**This software is licensed under GNU GPL version 3.**
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You can find the full text of the license [here](LICENSE).
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