DKRDS Model (File Format)
DKRDS Model is the nameless file format used in Diddy Kong Racing DS that stores models and textures. Its type identifier in assets.bin is 0x18, although it has also been seen in some 0x00-type files.
File Format
The file byte order is always little endian.
Header
The file starts with a header that is 48 bytes long. Unused models that might use an older version of the format have been seen with a 44-byte long header.
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt16 | Size flag. This flag indicates how much the vertex data is divided by in the short-to-float conversion:
|
| 0x02 | UInt16 | Unknown various flags. Each bit seems to correspond to a different flag:
|
| 0x04 | UInt16 | Number of models (M). |
| 0x06 | UInt16 | Unknown. |
| 0x08 | UInt16 | Number of textures. |
| 0x0A | UInt16 | Unknown. |
| 0x0C | Int32 | Unknown. |
| 0x10 | Byte[12] | Unknown. Padding? In earlier versions this would be an 8-byte padding instead |
| 0x1C | Int32 | Model Group offset. |
| 0x20 | Int32 | Texture Group offset. |
| 0x24 | Int32 | Texture Reference Table offset. |
| 0x28 | Int32 | Unknown. |
| 0x2C | Int32 | Unknown. |
| 0x30 | End of header | |
Model Group
The model group consists of M model entries.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Model Entry[M] | Model entries. |
Model Entry
Each model entry starts with a 16-byte header. All offsets are relative to the start of this entry.
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt16 | Number of vertices (V). |
| 0x02 | UInt16 | Number of triangles (T). |
| 0x04 | Int32 | Vertex Data offset. |
| 0x08 | Int32 | Triangle Data offset. |
| 0x0C | UInt16 | Unknown. |
| 0x0E | UInt16 | Unknown. |
| 0x10 | End of header | |
Vertex Data
Vertex data is stored as either 6-byte or 8-byte groups per vertex V, depending on the file header's flags.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Vertex Entry[V] | Vertex entries. |
| Offset | Type | Description | |
|---|---|---|---|
| 0x00 | Int16[3] | Vertex XYZ position. | |
| If Unknown various flag 0 = 1 | |||
| 0x06 | UInt16 | Bone ID. | |
Triangle Data
Triangle data is stored as 26-byte groups per triangle T.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Triangle Entry[T] | Triangle entries. |
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt16 | Texture ID. References the index from the Texture Reference Table. |
| 0x02 | UInt16[3] | Vertex indices. |
| 0x08 | UInt16[3] | Vertex colors. One per vertex, in RGBA5551 format. |
| 0x0E | UInt16[2][3] | UVs. One set per vertex. |
Texture Group
See DKRDS Texture Group.
Texture Reference Table
This section lists each 4-byte texture UID directly, in order. The index of each reference is used in the model data to know which texture corresponds to which triangle.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Byte[4][Number of Textures in Texture Group] | Texture UID. |
Tools
The following tools can handle DKRDS Model:
- (none)
