VoxelGame

Clone of Minecraft Classic version c0.30_c

Controls

• WASD to move
• Space to jump
• Move mouse to turn camera
• Left click to break block
• Right click to place block
• B or E to open block picker
• T or / to open chat
• Esc to pause game

Building

Requires Azalea and NBTLib, found at https://github.com/rmheuer/azalea and https://github.com/rmheuer/NBTLib.

They are both not currently in any Maven repositories, so they must be installed manually using mvn install.

Then VoxelGame can be built using mvn package. The resulting JAR will be found at target/VoxelGame-1.0-SNAPSHOT-jar-with-dependencies.jar.

Running

On Windows or Linux, you can simply run the JAR file with java -jar target/VoxelGame-1.0-SNAPSHOT-jar-with-dependencies.jar.

On macOS, the JVM flag -XstartOnFirstThread is required: java -XstartOnFirstThread -jar target/VoxelGame-1.0-SNAPSHOT-jar-with-dependencies.jar.

References

Lava and water animations: https://github.com/ClassiCube/ClassiCube/wiki/Minecraft-Classic-lava-animation-algorithm

Voxel raycast algorithm: http://www.cse.yorku.ca/~amana/research/grid.pdf

Player physics: https://www.mcpk.wiki/wiki/Main_Page

Occlusion culling: https://tomcc.github.io/2014/08/31/visibility-1.html

Multiplayer protocol: https://web.archive.org/web/20240516115242/https://wiki.vg/Classic_Protocol

Protocol extensions: https://web.archive.org/web/20240516115200/https://wiki.vg/Classic_Protocol_Extension

Viewing OpenGL calls by the original game using apitrace: https://apitrace.github.io/