Universe Overview

Universe gives a way to have multiple big-bangs communicate.

Each big-bang is individually called a “world”. They are also called “clients”. There is one “universe” running, which is the “server”. The universe server coordinates all of the communication between the big-bang clients.

There are some new technical additions to big-bang, and some recommendations for the design process.

Technical Information

• (make-package model message): Returned from a handler to update the model and send a message.

• Any handler (for example: key,mouse,tick) can return a package, which updates your own model and sends a message to the server.

• New handler: on-receive.

    receive-h: model message -> model
  

  Update your model based on a message you receive from the server.

Reading the Racket Documentation:

• model is called WorldState
• HandlerResult means either a model or a package.

Design Process

• Decide your big-bang model first. Use the usual process (draw scenes, write the model that goes with those scenes).

• Decide your universe model next. This means you need to decide what messages will be sent between worlds (big-bangs).

Miscellaneous

• The on-receive handler can return a package if needed.

Code

Generic server