Where forts rise

How Raid Bases picks land, saves it before building, and puts it back after every raid or crash.

A plugin that pastes buildings into a survival world has one job: never wreck anything. Raid Bases picks its spots carefully, saves the land before the first block changes, and checks every block when it puts the land back.

The search ring

Raids rise in the worlds listed under worlds. An empty list means the server’s first world.

Inside that world, Raid Bases tries random spots in a ring around site.center, between site.min-distance and site.max-distance blocks from it. By default that is 500 to 3,000 blocks from 0, 0.

plugins/RaidBases/config.yml

worlds:
  - world

site:
  center: [0, 0]
  min-distance: 500
  max-distance: 3000
  player-distance: 64
  max-inhabited-minutes: 15
  max-height-spread: 6
  max-wet-columns: 0
  attempts: 24
  generate-chunks: true
  margin: 4
  foundation-depth: 10

When a player runs /raid buy, or an admin runs /raid start, the fort rises in that player’s world if it is a raid world. Otherwise Raid Bases picks one of the configured worlds.

What a spot must pass

Raid Bases tries up to site.attempts spots (24 by default). A spot is refused when:

• It is someone’s home. Any chunk under the fort, or one chunk around it, where players have spent more than max-inhabited-minutes in total (15 by default). Lower is safer on servers without claims.
• A player is near. Anyone within player-distance blocks (64 by default).
• It holds someone’s things. Any chest, furnace, hopper, sign, bee nest, spawner or other block entity inside the fort’s area.
• It holds someone’s animals or decorations. Named or tamed mobs, item frames, paintings, armor stands, minecarts or boats.
• It is wet. More columns with water, lava, kelp, seagrass or waterlogged blocks under the fort than max-wet-columns (0 by default).
• It is too steep. The ground rises and falls by more than max-height-spread blocks (6 by default).
• It is outside the world border, too high or too low for the fort, or within 48 blocks of another standing raid.
• It is unexplored, when generate-chunks is false. Turn generation off on pre-generated worlds.

The ground check runs on a copy of the chunks, off the main thread. Just before building, Raid Bases looks again in case someone placed storage in the meantime.

If every try fails, the raid does not happen. An admin sees No raid this time: with the last reason, a buyer gets their money back, and the schedule tries again next turn.

On a world with many rivers, the big forts can struggle to find a dry spot. Raise site.attempts, or allow a few wet columns with max-wet-columns.

/raid start here

When an admin starts a raid where they stand, Raid Bases skips the inhabited-time, player-distance, slope and water checks. It still refuses block entities, someone’s animals or decorations, the world border, another raid within 48 blocks, and a floor too high or too low.

The land journal

Before the first block of a fort goes up, Raid Bases saves the whole area, from below the foundation to above the top, to a journal file in plugins/RaidBases/journals/. The fort only starts to rise once that file is on disk.

While the raid runs, the fort’s chunks stay loaded.

Putting the land back

When a raid ends, the fort comes down from the top and every block of the area goes back to what the journal says. Then Raid Bases makes a second pass over every block and fixes anything still different, such as something a player placed late or a block that physics moved.

Trees the fort cut through get their logs back, and their leaves are refreshed so they don’t decay afterwards.

The journal file is deleted only after the world has been saved with the land back in place.

Crash-safe

• Normal stop: every standing fort is put back at once, before the plugin shuts down.
• Crash, kill or power cut: on the next start, Raid Bases restores every journal it finds, saves the world, then deletes the journal. The console logs how many blocks were checked and restored.
• World loaded later: if a world manager loads the raid world after Raid Bases starts, its journals wait and are restored when the world loads.
• Damaged journal: it is kept on disk for a manual look and the console says so.
• World unloaded mid-raid: its forts are put back at once.

Don’t delete or edit files in plugins/RaidBases/journals/. They are how Raid Bases puts your land back.

Where announcements point

Chat rounds the announced location to announce.round blocks (25 by default). Admins see exact coordinates with /raid list, with a click to suggest a teleport.