This is a big one under the hood much has changed to optimize and improve the split-world experience. If you are coming from a previously split world make extra sure to update your split world config.yml file as the structure has changed and is not backwards compatible (notes on that below).

Supported Minecraft Versions

✅ 1.21.x ❓ 1.20.x (untested) ❌ 1.19.x (back port planned, will be uploading the jar soon)

Feature Changes

• Buffer zone is non-destructive now, this is a big one. In previous versions, the buffer zone was made by replacing every block in the buffer with bedrock. It was novel and there was spectacle to it but I never liked the fact that it permanently affected the world. I finally made it so that is no longer the case and threw in 2 optional ways to show the border. They are both on by default but you can disable either or both in the config file. border_particles - makes a wall of particles on the buffer zone boundary when a player gets near the buffer zone. border_blocks - emulates the legacy behavior but sends a client side packet to make the blocks appear as if they are all black concrete instead of actually replacing them. If you uninstall the plugin, it will be like it was never there.
• You can set game modes per world without splitting them. This allows you to have the ultimate flexibility with however many worlds you have, one world can be split, another can be creative, and another can be adventure, etc. The SplitWorld plugin will provide all the same inventory management and cheat prevention mechanisms across worlds as it does per sides in split worlds.
• You can set pitch and yaw in respawn location. This is a small change but it allows you to have the player face a specific direction when they respawn or first join

Cheat prevention

• Players will be ejected from vehicles and vehicles will be prevented from crossing the border (chest boats, chest mine carts, mules, etc.)

Config Changes

This version introduces breaking changes with the old config structure, this was to optimize the initialization of respawn location and to enable game modes per world if desired.

default_game_mode: "survival"
disable_welcome_message: false
enable_xp_mod: false
xp_loss_percentage: 25.0
custom_respawn: false
respawn_location:                 # name changed, this section is only required if custum_respawn is set to true
  world: "split_world"            # world is now in the respawn location 
  x: 140.0                        # note the removal of the - before the x, y, and z options
  y: 53.0
  z: -64.0
  yaw: 0.0                        # added yaw
  pitch: 0.0.                     # added pitch
border_particles: true            # new toggle for rendering particle wall for boundary
border_blocks: true.              # new toggle for client-side buffer-zone block replacement
enable_easter_eggs: false
world_configs:
  - world_name: "world"
    enabled: true                 # you can still use default_game_mode with this set false to set the game mode on a per-world basis
    default_game_mode: "survival" # optional world override for the global default_game_mode, this is the game mode for the world if enabled is false or the game mode for the non-creative side
    border_axis: "X"
    border_location: 0
    creative_side: "negative"
    border_width: 5
    no_creative_monsters: true