OpenTTDDevBlackBook/Settings/CreateSavegame

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HAL (Hardware Abstraction Layer)

Audio
Music
Graphic

Window System

Using the Window System
Colour codes that exist in OpenTTD
Adding a text box
Understanding the widget focus system

Settings

Add a setting
Add a squirrel function
Do a savegame BUMP

The Map / Scenario

Understanding the Dynamic Landscape Array
Understanding the SaveGame Handler
HOWTO - Create good Scenarios
HOWTO - Add New Town Name Generators

The actual simulation

Vehicles
Using Orders
Pathfinding
Ratings
Train Acceleration

Language and Strings

Format of langfiles
Using OpenTTD Strings
List of Special Strings

Multiplayer

The Core Interface

Starting a Server
Connecting to a Server
Using the list of LAN/Internet Games

The OpenTTD TCP Protocol
The OpenTTD UDP Protocol
HOWTO - Debug desyncs

Ingame Console

The Console Window
Using Console Scripting
HOWTO - Add Functions/Commands to the Console
HOWTO - Add Variables to the Console
HOWTO - Direct Variable Access using ICONSOLE_VAR_POINTER
OpenTTD Console Commands
OpenTTD Console Variables
Development History

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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