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Dev mode

Dev mode, or developer mode, is a mode in Empeld that enables you to test changes more quickly.

It does so by enabling the following:

  • Start the game in a limited mode, without logging in to your account
  • Test the World and Environments in the game
  • Load faster, by not having to load the entire server and entities
  • When writing Boo, it will auto-detect changes and re-load itself

You can run in dev mode by specifying --dev upon start the game. For full details, run:

empeld.exe -h


Starting a Full Game

This is useful to test a full mod to make sure it works with multiplayer

empeld.exe -a username:password \
  -bgserver -join=localhost \
  -plugins=essentials,essentials.action,essentials.blocks.structural,essentials.blocks.alien,essentials.blocks.vegetation,sandbox \
  --world=Sandbox --game=Sandbox --environment=Basic

Testing a World

This tests a "World" without instantiating the game, server, or many of the effects. Loads the game much faster. Supports hot-reloading if a binary/script changes.

empeld.exe -dev \
  -plugins=essentials,essentials.action,essentials.blocks.structural,essentials.blocks.alien,essentials.blocks.vegetation,sandbox \
  --world=Sandbox --environment=Basic

Testing a Model

empeld.exe --dev-model path/to/my/model.mml

Testing a Particle System

empeld.exe --dev-psys path/to/my/particlesystem.psys

Testing UI

BUI (Boo UI)

empeld.exe --dev-ui path/to/my/ui.xml


empeld.exe --dev-ui2 path/to/my/ui2.xml