Terrarum/work_files/DataFormats/just-json-it-saveformat.md

Savegame Structure

• The Savegame is a TerranVirtualDisk archive that stores multiple files in the disk's root directory
• Savegame stores metadata, Worlds and Actors in the game
• A player gets one unique Savegame
• A player can have Multiple worlds
  • Worlds are identified using integer ranged 1 through 32767 (inclusive)
• Actor ID is unique within the scope of the Savegame
  • A World stores list of Actor IDs that resides in the world

File Structure

Each file on the Savegame has following convention:

Type	Filename	ID
Metadata	savegame	-1
Blocks Properties	blocks	-16
Items Properties	items	-17
Wires Properties	wires	-18
Materials Properties	materials	-19
Factions Properties	factions	-20
Other Properties used by modules	modprops	-1024
Worlds	world$n ($n is a world index)	$n
Actors	actor$n ($n is an Actor ID)	$n

User formats can have ID of -2147483648..-65536

Solving Problems

How do I determine which world to read in?

Load the player (always has the entry ID of 9545698) and the property "worldCurrentlyPlaying" should contain an integer that is a world index. Only the actors that are instance of IngamePlayer will have the property.

Save File Examples

Following code is an example Savegame JSON files.

savegame.json

{
    savename: "Test World 1",
    genver: 4, /* generator version in integer */
    terrseed: "84088805e145b555",
    randseed: "19b25856e1c150ca834cffc8b59b23ad",
    weatseed: "e5e72beb4e3c6926d3dc9e3e2ef7833b",
    playerid: 9545698,
    creation_t: <creation time in real-world unix time>,
    lastplay_t: <last play time in real-world unix time>,
    playtime_t: <total play time in real-world unix time>,
    thumb: <Ascii85-encoded gzipped thumbnail image in TGA>,
    loadorder: <LoadOrder serialised>,
    worlds: [1,2,6,7]
}

world1.json

File is named as "world"+world_index+".json". The fields are auto-generated by GDX's JSON serialiser.

{
    worldName: "New World",
    worldIndex: 1,
    width: 9000,
    height: 2250,
    spawnX: 4500,
    spawnY: 248,
    creationTime: 1629857065,
    lastPlayTime: 1629857065,
    totalPlayTime: 0,
    layerTerrain: {
        h: <SHA-256 hash of 'b'>,
        b: <Ascii85-encoded gzipped terrain layerdata>,
        x: 9000,
        y: 2250
    },
    layerWall: {
        h: <SHA-256 hash of 'b'>,
        b: <Ascii85-encoded gzipped wall layerdata>,
        x: 9000,
        y: 2250
    },
    wallDamages:{},
    terrainDamages: {},
    fluidTypes: {}
    fluidFills: {},
    wirings: {},
    wiringGraph: {},
    gravitation: {y:9.8}
    globalLight: {
        r:0.8826928,
        g:0.8901961,
        b:0.9055425,
        a:0.93691504
    },
    averageTemperature: 288,
    generatorSeed: 0,
    worldTime: 27874,
    tileNumberToNameMap: {},
    extraFields: {},
    genver: 4
    comp: 1
}

actors.json

The fields are auto-generated by GDX's JSON serialiser.

[
    { /* actor serialised in JSON *
        class: "net.torvald.terrarum.modulebasegame.gameactors.IngamePlayer", /* depends on the actor */
        referenceID: 1342111743,
        actorValue: { /* actorValue serialised in JSON */ },
        hitbox: ...,
        ...
     },
    ...
]