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Useful Commands

Minecraft Commands

A more complete guide to commands can be found on the Minecraft Wiki. Keep in mind that we are using Minecraft 1.12 and some information in the wiki might concern more recent versions.

In the server console

  • op <username> makes <username> an operator.
  • time set 0 sets daytime.
  • weather clear removes the rain.
  • gamemode <survival|creative|adventure|spectator> <username> sets <username>'s gamemode
  • tp <username> <x> <y> <z> teleports <username> to (<x>, <y>, <z>).
  • stop stops the server.

From an operator

Commands must be typed in the chat and preceded by /. All server commands can be used by an operator.

  • tp <x> <y> <z> teleports the operator to (<x>, <y>, <z>).
  • gamemode <survival|creative|adventure|spectator> sets the operator's gamemode.

Minecraft Server Agents Commands

  • tps displays the number of ticks processed per second.
  • ft controls the execution speedup feature:
    • ft start enables fast ticking.
    • ft <duration> enables fast ticking for <duration> ticks.
    • ft stop disables fast ticking (disable it before using stop, compile and maybe some other commands).
  • env allows manual creation of environments.
    • env add <env-id> <env-type> creates an environment of type <env-type> with unique name <env-id>. <env-type> is the name of the environment's Java class without Environment and eventually followed by parameters: an example would be Pattern[8,2,4].
    • env remove <env-id> removes environment <env-id>.
    • env player <env-id> <username> ... adds <username> (multiple players can be specified) to <env-id> as a human actor.
  • exec <class> <static-method> executes <static-method> of <class>: an example would be exec edu.usc.thevillagers.serversideagent.env.EnvironmentTrade writeStats.
  • cst <name> <value> set constant <name> to <value>.
    • cst skip <int> specifies the number of ticks to skip between environment updates (default: 0).
    • cst speed <float> specifies agents' movement speed factor (default: 1).
    • cst prop <float> specifies agents' discrete actions probability factor (default: 1).
    • cst pitch <float> specifies agents' maximum pitch magnitude (default: 90).
  • rec controls the recording features.
    • rec start <from-x> <from-y> <from-z> <to-x> <to-y> <to-z> starts recording of the world in the specified box. No other recording can procced at the same time.
    • rec stop stops the current recording and saves it to forge/mod/run/tmp/records
  • exp <env-type> <episodes> <x> <y> <z> <username> ... starts an experiment with specified human subjects within an environment of <env-type> at the specified position and records it for <episodes>. Only one experiment or recording can happen at one time. Experiments can be stopped early by rec stop and env remove exp.
  • compile <record> <env-type> compiles the only recording containing <record> into the observation-action dataset forge/mod/run/tmp/imitation/<record>.h5 using the observation and actions spaces defined by <env-type>.

Tools for Recordings

Visual replay

When in Minecraft's menu, pressing Ctrl + R (Ctrl + Command + R on Mac) opens a screen where a recording can be selected.

File formats

Recordings' files are formatted using Minecraft's Named Binary Tag format. Those can be edited using NBTExplorer.

Dataset files are formatted using Hierarchical Data Format 5.