Bridge server to connect Minecraft Earth to a Minecraft Java edition server, inspired by Geyser.
This project uses the Maven build system. You will need to have Maven installed (or use an IDE that includes it).
Fountain uses a fork of the Cloudburst Protocol library that includes support for the Minecraft Earth protocol. You must first download this from https://github.com/Project-Genoa/Protocol and build and install it to your local Maven repository by running ./gradlew publishToMavenLocal.
Fountain provides a plugin interface which is published as a separate library. Before building Fountain, you must download this from https://github.com/Project-Genoa/Fountain-connector-plugin-base and build and install it to your local Maven repository by running ./mvnw install from the root directory of the Fountain-connector-plugin-base repository.
To build Fountain, run ./mvnw package from the project root directory. The build output will be in /target.
Using Fountain requires a Minecraft 1.20.4 server with the Fountain Fabric mod installed. Follow the instructions here to install the Fountain Fabric mod: https://github.com/Project-Genoa/Fountain-fabric.
Your Minecraft server must be running in offline mode. Set online-mode=false and enforce-secure-profile=false in the server.properties file. Disable spawn protection by setting spawn-protection=0 in the server.properties file.
Once your Minecraft Java edition server is set up and running, run the fountain-<version>-jar-with-dependencies.jar JAR file from the build output directory (see above).
Set your game mode to creative if you are playing on a buildplate, and survival if you are playing an adventure. (The Fountain Fabric mod will take care of applying the appropriate Earth-specific behavior in each mode, such as allowing you to pick up blocks into your inventory in creative mode.)
Disable daylight cycle and set the time to noon with /gamerule doDaylightCycle false and /time set noon (or /time set midnight) in the server console.
Disable natural mob spawning with /gamerule doMobSpawning false in the server console, otherwise bats and hostile mobs may spawn and make noise.
Each time you join the server you will have an empty inventory and hotbar (inventory is not synchronised with the Minecraft Earth API server). Use /give in the server console to give yourself items/blocks.
Minecraft sea level is at Y 63. In order to have the surface level of your buildplate appear at ground level in AR, set the Y offset in your API server buildplate response to 63.
The Fountain Fabric mod includes a chunk generator that will generate a world containing a section of Minecraft terrain surrounded by the appropriate special-purpose blocks for it to appear and behave correctly as a buildplate in Minecraft Earth. To use it, set level-type=fountain\:wrapper and generate-structures=false in the server.properties file (do not forget the backslash in fountain\:wrapper). You must do this before you create the world as the settings are only applied to new worlds (if the world directory already exists then delete or move it first). Due to the nature of Minecraft world generation, you may end up with a buildplate containing a tall mountain, empty ocean, etc. and need to change the world seed a few times to find one that works well.