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file_formats:big [2006/02/17 23:40] (current) |
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+ | =====BIG File Specification===== | ||
+ | ====Main header==== | ||
+ | Char [4] 'BIGB' \\ | ||
+ | Char [4] Version \\ | ||
+ | Int [4] Bank address \\ | ||
+ | Int [4] unknown \\ | ||
+ | |||
+ | ====Bank Index==== | ||
+ | Int [4] Number of Banks \\ | ||
+ | Char [x] NULL terminted string \\ | ||
+ | Int [4] Bank ID \\ | ||
+ | ===Bank=== | ||
+ | Int [4] Number of Entries in Bank \\ | ||
+ | Int [4] Index Start \\ | ||
+ | Int [4] Index Size \\ | ||
+ | Int [4] block size \\ | ||
+ | |||
+ | ==== FileIndex ==== | ||
+ | === Header === | ||
+ | Int [4] NumberFileTypes \\ | ||
+ | Int [4] FileType \\ | ||
+ | Int [4] NumberFiles \\ | ||
+ | |||
+ | === Index === | ||
+ | Int [4] Magic Number \\ | ||
+ | Int [4] File ID \\ | ||
+ | Int [4] File Type \\ | ||
+ | Int [4] File Size \\ | ||
+ | Int [4] File Start \\ | ||
+ | --[dev info]-- \\ | ||
+ | Int [4] File Type \\ | ||
+ | Int [4] StringLength; \\ | ||
+ | Int [StringLength] SymbolName \\ | ||
+ | Int [4] File CRC \\ | ||
+ | Int [4] Number of Source Files \\ | ||
+ | Int [4] StringLength; \\ | ||
+ | Int [StringLength] Source File Name \\ | ||
+ | --[/dev info]-- \\ | ||
+ | Int [4] SubHeaderSize \\ | ||
+ | Int [SubHeaderSize] SubHeader \\ | ||
+ | === Texture sub-header: === | ||
+ | Int [2] Width; // Texture size...// \\ | ||
+ | Int [2] Height; \\ | ||
+ | Int [2] Depth; // ...and depth for vol. textures// \\ | ||
+ | Int [2] FrameWidth; // Actual image size (may be smaller)// \\ | ||
+ | Int [2] FrameHeight; \\ | ||
+ | Int [2] FrameCount; \\ | ||
+ | Int [2] DXT Compression; \\ | ||
+ | Int [2] Unkown; \\ | ||
+ | Int [1] Transparency; // Number of alpha channels// \\ | ||
+ | Int [1] MipMaps; // Number of MipMaps// \\ | ||
+ | Int [2] Unkown; \\ | ||
+ | Int [4] TopMipmapSize; \\ | ||
+ | Int [4] TopMipmapCompressedSize; \\ | ||
+ | Int [2] Unkown; // DXT compression again?// \\ | ||
+ | Int [4] Unkown; \\ | ||
+ | |||
+ | The first mipmap of each texture is compressed using lzo1x and the rest are uncompressed. \\ | ||
+ | === Mesh Sub-header: === | ||
+ | Dword Physics_Mesh; \\ | ||
+ | Float [10]; //matches first 40 bytes of bbm. possibly origin// \\ | ||
+ | Dword Number_LOD's; \\ | ||
+ | Dword [Number_LOD's] Size_compressed_LOD; \\ | ||
+ | Dword padding; \\ | ||
+ | Dword Number_Textures_Assigned; // 1 per surface within model// \\ | ||
+ | Dword [Number_Textures_Assigned] Texture_ID; //Texture ID as used in the textures.big// \\ |