Sly 1:GS

This article is about the game state for Sly 1. For the data structure that controls the game state in Sly 2 and 3, see DAG.

GS (Game State) is a data structure in Sly 1. It stores an array of World States, which in turn each store an array of Level States.

Structure

The GS struct is declared as follows:

struct GS {
    int gsv;
    int cbThis; /* Size of this struct in bytes */
    int nChecksum; /* Checksum is the size of the savedata */
    float dt; /* Time spent in save file (secs) */
    struct WS aws[6]; /* Saves for each world */
    enum GAMEWORLD gameworldCur; /* Current gameworld */
    enum WORLDLEVEL worldlevelCur; /* Current worldlevel */
    int clife; /* Lives count */
    int ccharm; /* Charms count */
    int ccoin; /* Coins count */
    GRFGS grfgs; /* Settings flags? */
    GRFVAULT grfvault; /* Powerup flags */
    uint unlocked_cutscenes; /* Cutscene flags */
    enum FGS fgs; /* Game state flags */
    int last_powerup; /* Last selected powerup */
};

World states array

Main article: WS

aws is an array of 5 WS structs, one for each world. In the release build, the order is as follows:

• 0: Intro
• 1: Underwater
• 2: Mesa
• 3: Voodoo
• 4: Snow
• 5: Clockwerk

Unlockable flags

There are three^[check] sets of flags after the world states.

Settings flags (GRFGS)

There is a set of flags of type GRFGS whose purpose is unclear. At least some of the bits appear to be used for game settings. GRFGS is an alias of int and occupies 4 bytes, or 32 bits.

Powerup flags (GRFVAULT)

There is a set of flags of type GRFVAULT for the unlocked powerups, with each bit corresponding to a particular powerup being unlocked. GRFVAULT is an alias of int and occupies 4 bytes, or 32 bits.

Cutscene flags

There are 16 bits for the cutscene flags, with each bit corresponding to a particular cutscene being unlocked. It is probably also stored as a typedef alias of int but the type is currently unknown.

Game state flags

The current game state is represented by the FGS enum, which has the following possible values:

FGS_FirstClue	0x1
FGS_HalfClues	0x2
FGS_AllClues	0x4
FGS_FirstVault	0x8
FGS_SecondVault	0x10