OpenTTDDevBlackBook/Settings/CreateSavegame

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External Links

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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
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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
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Debugging desyncs
Server Admin Port development

Ingame Console

The console window
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Adding functions/commands to the console
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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


Note: This is just a rough overview of what to do if you want to bump to a new savegame. I myself am not very experienced and hope some more experienced person will complete this to a minimalistic guide on how to create a new savegame version.


Important locations in the code to look at, when you want to do a savegame bump:

  • saveload.cpp:40
    • extern const uint16 SAVEGAME_VERSION = 103; // increase by one
  • openttd.cpp:AfterLoadGame(...) // use this to do default variable settings if a older save game was loaded
  • have a look at all the references of the class SaveLoad. Use SLE_ macros to add your variables to save
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