WBD-WBN

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WBD/WBN Description

WBD is a "Windows Bounds Dictionary" file usually located in the "Rockstar Games\Grand Theft Auto IV\pc\data\maps\xxx_folder\xxx.img"

WBN is a "Windows Bounds Nodes" file usually located in the "Rockstar Games\Grand Theft Auto IV\pc\data\maps\xxx_folder\xxx.img"

these files are the method used within GTA-IV for collision files, early indications show that map model colision files are mapped in game "World coordinates"

File Format

Here is some basic information that has been gathered so far. (From decompressed ext_door.wbd)

  • CPU Offsets are of form [xx xx xx 50] * Data Offsets are of form [xx xx xx 60]
WBD Header
-------------------------------------------------------------------
Offset	Size	Type	Data			Description
-------------------------------------------------------------------
0x00	4b	LONG	VTable		
0x04	4b  	Offset	Offset to blockMap
0x08	4b  	LONG	Unknown
0x0C	4b  	LONG	Unknown
0x10	8b  	SimpleCollection<Hashes>	Collection that contains all hashes of the models
0x18	8b	PointerCollection<Unknown>
--------------------------------------------------------------------
SimpleCollection (BlockSize 0x08) 
Contains data of the given type
--------------------------------------------------------------------
0x00	4b	Offset	Offset to the Data
0x04	2b	Short	Data Count
0x06	2b	Short	Data Size
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