Development

From OpenTTD
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External Links

OpenTTD GitHub
Contributing to OpenTTD - guidelines
OpenTTD Doxygen

General Reference

Coding style
Compiling OpenTTD
Debugging
Add a setting
Add a squirrel function
Understanding the SaveGame handler
Bumping the savegame version
Doing an OpenTTD release

Language and Strings

Format of langfiles
Using OpenTTD strings
List of special strings

Window System

Using the window system
Colour codes that exist in OpenTTD
Adding a text box
Understanding the widget focus system
GUI style guide

Multiplayer

The OpenTTD TCP protocol
The OpenTTD UDP protocol
Debugging desyncs
Server Admin Port development

Ingame Console

The console window
Console commands
Console variables
Using console scripting
Adding functions/commands to the console
Adding variables to the console
Console development history

Content APIs (modding frameworks)

Graphics and similar (NewGRF)
AI framework (NoAI)
GameScript framework (NoGO)

Other Reference

Map array (landscape grid)
Vehicles
Pathfinding
Train acceleration


BlackBook.png

Overview

Development Docs

There is no single source for OpenTTD development docs. It's a complex project with a long history, and multiple APIs.

For developing the core game, the "OpenTTD Development Documentation" sidebar navigation on this page is a good entry point, providing:

  • links to development docs on this wiki
  • links to external sources such as OpenTTD GitHub (which includes some core development docs) and Doxygen


OpenTTD includes multiple APIs for developing add-ons / mod content. The sidebar navigation on this page also provides links to "Content APIs (modding frameworks)".

Other Resources

Personal tools