Kingdom Hearts II - DOCT

DOCT is a occlusion culling definition.

The occlusion culling is useful to shorten 3D rendering time. For example, buildings behinds you can be ommitted from rendering.

DOCT uses only bounding boxes to represent the areas that are holding mesh data (VIF packets) to be rendered.

DOCT Structure

BAR Header

Offset	Variable Type	Description
0	char[4]	The identifier of the file (Should be always 0x54434F44)
4	uint32_t	Version: always 2
8	uint32_t	Unknown
12	uint32_t	HeaderOffset: always 0
16	uint32_t	HeaderLength: always 0x2C
20	uint32_t	Entry1FirstOffset
24	uint32_t	Entry1TotalLength
28	uint32_t	Entry2FirstOffset
32	uint32_t	Entry2TotalLength
36	uint32_t	Entry3FirstOffset
40	uint32_t	Entry3TotalLength

Table1 (Array of entry1)

Offset	Variable Type	Description
0	int16_t	Child1
2	int16_t	Child2
4	int16_t	Child3
6	int16_t	Child4
8	int16_t	Child5
10	int16_t	Child6
12	int16_t	Child7
14	int16_t	Child8
16	float32	MinX
20	float32	MinY
24	float32	MinZ
28	float32	MaxX
32	float32	MaxY
36	float32	MaxZ
40	uint16_t	Entry2Index
42	uint16_t	Entry2LastIndex
44	uint32_t	Unknown

Note : ChildX: -1 to mean nothing to point.

Note : (X,Y,Z) are inverted (-X,-Y,-Z).

Table2 (Array of entry2)

Offset	Variable Type	Description
0	uint32_t	Flags
4	float32	MinX
8	float32	MinY
12	float32	MinZ
16	float32	MaxX
20	float32	MaxY
24	float32	MaxZ

Note : (X,Y,Z) are inverted (-X,-Y,-Z).