WBD-WBN

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Windows bounds dictionary (WBD) and Windows bounds nodes (WBN) are two formats for collision files used in GTA 4.

File Format

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 <Bounds>	Collection that contains pointers to the Bounds Data
--------------------------------------------------------------------
SimpleCollection (Hashes) (BlockSize 0x08) 
Contains data of the given type
--------------------------------------------------------------------
0x00	4b	Offset	Offset to the Hashes Data
0x04	2b	Short	Data Count
0x06	2b	Short	Data Size
--------------------------------------------------------------------
PointerCollection (Bounds) (BlockSize 0x08) 
Contains data of the given type
--------------------------------------------------------------------
0x00	4b	Offset	Offset to the Bounds Data PointerCollection
0x04	2b	Short	Data Count
0x06	2b	Short	Data Count
--------------------------------------------------------------------
Bounds data (BlockSize 0x240h)
--------------------------------------------------------------------
0x00	4b	Long	VTable
0x04	2b	Short	Pivot Count (Usually 3)
0x06	2b	Short	(Usually 1)
0x08	2b	Short	(Usually 1)
0x0A	2b	Short	(Usually 0)
0x0C	4b  	Float	Bounding Sphere Radius Size
0x10	4b  	Float   Bounding Box Max (X)
0x14	4b  	Float   Bounding Box Max (Y)
0x18	4b  	Float   Bounding Box Max (Z)
0x1C	4b	Long    Always 1 (Hex 0100807F)
0x20	4b  	Float   Bounding Box Min (X)
0x24	4b  	Float   Bounding Box Min (Y)
0x28	4b  	Float   Bounding Box Min (Z)
0x2C	4b	Long    Always 1 (Hex 0100807F)
0x30	4b	Float	x (Bounding Sphere Pivot Coords)
0x34	4b	Float	y
0x38	4b	Float	z
0x3C	4b	Long	Always 1 (Hex 0100807F)
0x40	4b	Float	x (Bounding Box Pivot Coords)
0x44	4b	Float	Y
0x48	4b	Float	Z 
0x4C	4b	Long	Always 1 (Hex 0100807F)
0x50	4b	Float	x (Geometry Model Pivot Coords)
0x54	4b	Float	Y 
0x58	4b	Float	Z 
0x5C	4b	Long	Always 1 (Hex 0100807F)
WBN Header
-------------------------------------------------------------------
Offset	Size	Type	Data			Description
-------------------------------------------------------------------
0x00	4b	LONG	VTable		
0x04	4b  	Offset	????
0x08	4b  	Offset	Collection of Bounding Definitions (see VTable page)

Tools

The following tools and scripts can be used to import & export (edit) these collisions files.