DKRDS Track (File Format)

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DKRDS Track is the nameless file format used in Diddy Kong Racing DS that stores the tracks' section models, collision and textures. Its type identifier in assets.bin is 0x9A.

File Format

The file byte order is always little endian.

Header

The file starts with a header that is 56 bytes long.

Offset	Type	Description
0x00	Int32	Number of sections (N).
0x04	Int32	Track Section Group offset.
0x08	Int32	Unknown Section 1 offset.
0x0C	Byte[4]	Unknown. Always 0xCCCCCCCC.
0x10	Int32	Unknown Section 2 offset.
0x14	Int32	Unknown Section 2 data type: 1 = 4-byte per N group. 2 = 8-byte per N group.
0x18	Int32	Number of textures.
0x1C	Int32	Texture Group offset.
0x20	Int32	Unknown Section 3 offset.
0x24	Int32	Wish Race Unknown Section entry count.
0x28	Int32	Wish Race Unknown Section offset.
0x2C	Byte[4]	Unknown. Seems to be some kind of flags.
0x30	Int32	Unknown.
0x34	Int32	File size.
0x38	End of header

Track Section Group

This group starts with a list of N offsets.

Track Section Header

Offset	Type	Description
0x00	Int32[N]	Track Section Entry offsets. Relative to the start of this group.

Track Section Entry

Every section entry defines model and collision data. The entry starts with a 32-byte header.

Track Section Entry Header

Offset	Type	Description
0x00	Byte	Unknown.
0x01	Byte	Unknown. Always 5?
0x02	UInt16	Unknown.
0x04	UInt16	Number of entries in Track Section Collision (1E).
0x06	UInt16	Number of vertices in Track Section Vertex Data (2E).
0x08	UInt16	Number of entries in Track Section UV Data (3E).
0x0A	UInt16	Number of colors in Track Section Color Data (4E).
0x0C	Int32	Unknown.
0x10	Int32	Track Section Unknown Data 1 offset.
0x14	Int32	Track Section Vertex Data offset.
0x18	Int32	Track Section Unknown Data 2 offset.
0x1C	Int32	Track Section Color Data offset.
0x38	End of header, start of Track Section Data

Track Section Data

This data starts with an unknown size header and some data, followed by the model and collision data referenced by the previous header's offsets.

Track Section Collision Data

48-byte data per entry 1E. TBD

Track Section Vertex Data

Vertex data is stored as 6-byte groups per entry 2E.

Offset	Type	Description
0x00	Int16[3][2E]	Vertex XYZ position.

Track Section UV Data

UV data is stored as 4-byte groups per entry 3E.

Offset	Type	Description
0x00	Int16[2][3E]	Vertex UV position.

Track Section Color Data

Color data is stored as 2-byte groups per entry 4E.

Offset	Type	Description
0x00	UInt16[4E]	RGBA5551 color.

Unknown Section 1

TBD

Unknown Section 2

TBD

Texture Group

See DKRDS Texture Group.

Unknown Section 3

TBD

Wish Race Unknown Section

This section is only used for the Wish Race tracks. TBD

Tools

The following tools can handle DKRDS Track:

• (none)