Save function?

[Fanatik]

Could anyone tell me what exactly is saved whenever the game saves itself? If nothing from the GS is saved automatically, is there a Class for this with a GameSave-Event or something like that? I crawled through the NoGo API but didnt find any related events

[planetmaker]

The gamescript doesn't save anything. Just the map state is saved and which game script, AIs and NewGRFs are in use.

EDIT: see Zuu's answer below

[Fanatik]

Ok so Challenges, Achievements and such could not be carried over to a savegame... at least not without some dirty tricks ^^

[Zuu]

You need to store everything that you want to save in a table.

At loading you typically just copy the table and store it in a member variable of the GS/AI and process it later. This is because if you don't return quick enough in the Load function, OpenTTD will kill your AI/GS. Also note that there is an upper limit of how long time you are allowed to spend in the Save function.

In the TileLabels class I have added ExportToSave() and ImportFromSave member functions that allow someone using that library to gather a table representation of the library storage and then to restore it:
http://dev.openttdcoop.org/projects/gsl ... y/main.nut

In TutorialGS you can see an example of how the ImportFromSave is called:
http://dev.openttdcoop.org/projects/gs- ... n.nut#L106

Saving you find here:
http://dev.openttdcoop.org/projects/gs- ... n.nut#L232

[Fanatik]

so there are actually Load/Save Functions... looked here http://nogo.openttd.org/api/trunk/index.html and there was nothing like this. Not documented yet or is this the wrong documentation?

[Zuu]

Take a look at the Save/Load article at the AI section of the wiki.