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ENGINE_LEVEL - LevelGraphicsFile Format


2008-11-05, 13:54 by Keshire
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TodX Administrator #1
Member since Oct 2008 · 16 posts · Location: San Diego
Group memberships: Administrators, Members
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Subject: ENGINE_LEVEL - LevelGraphicsFile Format
Here's what I have so far on the engine_level/LevelGraphicsFile format.  This format will not properly work in HW as it seems to cut off the strings after 10 chars and thus screws the rest of the format, and in the process sucks up a ton of cpu and mem (a 2.2kb file sucked up 1.4gb ram).  There may also be additional file types that I have not yet run into.

This file seems to have links to a number of other files used for loading/rendering the level.  This includes heightmaps and flora models.  The flora models are followed by what looks like instancing data to spawn instances with.

#include "standard-types.hsl"

#pragma byteorder(big_endian)
#pragma maxarray(65536)     // max that hw 5.1 will allow
#pragma maxstring(512)

typedef struct Coord3D
    float    X;
    float    Y;
    float    Z;
} Coord3D;

typedef struct LGFFloraInstance
    Coord3D    Coord;
    float    Unknown1;    // these two floats seem to always be very small, very close to 0
    float    Unknown2;    // they could be used for rotation maybe? though that's usually done with quaternions
} LGFCoordEntry;

typedef struct LGFUnknownBBEntry    // looks like it might be bounding box, but not sure
    DWORD    Start;
    DWORD    End;
    Coord3D    StartCoord;
    Coord3D    EndCoord;
} LGFUnknownBBEntry;

typedef struct LGFFileEntry
    DWORD    Type;
    zstring    FileName;
    switch (Type)
        case 0x4:
            DWORD    Unknown1;
            DWORD    Unknown2;
        case 0x5:    break;
        case 0x15:
            char    Unknowns1[11];
            DWORD    CoordCount;
            float    Unknowns2[11];
            char    Unknowns3Null[24];
            LGFFloraInstance    Coords[CoordCount];
            DWORD    UnknownBBCount;        // I think these might be bounding boxes, but not sure
            LGFUnknownBBEntry    UnknwonBBs[UnknownBBCount];
        case 0x20:    break;
        default:    break;
} LGFFileEntry;

typedef struct LevelGraphicsFile
    char    LevelGraphicsFileTag[17];    // = "LevelGraphicsFile"
    DWORD    Unknown1;
    DWORD    FileCount;
    LGFFileEntry    Files[FileCount];
} LevelGraphicsFile;
This post was edited on 2008-12-05, 19:23 by TodX.
LittleCodingFox #2
Member since Nov 2008 · 34 posts
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Just to let you know that you have a bit of an error there on LGFFloraInstance, you rename it to LGFCoordEntry, so HexWorkshop will say it has an error.
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