DKRDS Model (File Format): Difference between revisions

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{{under-construction}}
'''DKRDS Model''' is the nameless file format used in ''[https://en.wikipedia.org/wiki/Diddy_Kong_Racing_DS 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.
'''DKRDS Model''' is the nameless file format used in ''[https://en.wikipedia.org/wiki/Diddy_Kong_Racing_DS Diddy Kong Racing DS]'' that stores models and textures.


= File Format =
= File Format =
Line 6: Line 5:


== Header ==
== Header ==
The file starts with a header that is 48 bytes long.
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.


{|class=wikitable
{|class=wikitable
! Offset !! Type !! Description
! Offset !! Type !! Description
|-
|-
| 0x00 || Byte[8] || {{unknown-left|'''Unknown flags'''.}}
| 0x00 || UInt16 || '''Size flag'''. This flag indicates how much the vertex data is divided by in the short-to-float conversion:
* 0 = Divided by 16 (?)
* 1 = Divided by 4096 (?)
|-
|-
| 0x08 || Int32 || '''Number of textures'''.
| 0x02 || UInt16 || {{unknown-left|'''Unknown various flags'''. Each bit seems to correspond to a different flag:}}
* 0 = If 1, bone IDs are attached to each vertex
|-
|-
| 0x0C || Byte[16] || {{unknown-left|'''Unknown'''. Padding?}}
| 0x04 || UInt16 || '''Number of models''' ('''M''').
|-
|-
| 0x1C || Int32 || '''[[#Model Data|Model Data]]''' offset.
| 0x06 || UInt16 || {{unknown-left|'''Unknown'''.}}
|-
|-
| 0x20 || Int32 || '''[[#Texture Data|Texture Group]]''' offset.
| 0x08 || UInt16 || '''Number of textures'''.
|-
| 0x0A || UInt16 || {{unknown-left|'''Unknown'''.}}
|-
| 0x0C || Int32 || {{unknown-left|'''Unknown'''.}}
|-
| 0x10 || Byte[12] || {{unknown-left|'''Unknown'''. Padding? In earlier versions this would be an 8-byte padding instead}}
|-
| 0x1C || Int32 || '''[[#Model Group|Model Group]]''' offset.
|-
| 0x20 || Int32 || '''[[#Texture Group|Texture Group]]''' offset.
|-
|-
| 0x24 || Int32 || '''[[#Texture Reference Table|Texture Reference Table]]''' offset.
| 0x24 || Int32 || '''[[#Texture Reference Table|Texture Reference Table]]''' offset.
|-
|-
| 0x28 || Int32 || {{unknown-left|'''Unknown'''. Always the same value as the texture reference table offset?}}
| 0x28 || Int32 || {{unknown-left|'''Unknown'''.}}
|-
|-
| 0x2C || Int32 || {{unknown-left|'''Unknown'''. Sometimes 0, sometimes the size of the entire file?}}
| 0x2C || Int32 || {{unknown-left|'''Unknown'''.}}
|-
|-
| 0x30 || colspan=2 {{unknown|End of header}}
| 0x30 || colspan=2 {{unknown|End of header}}
|}
|}


== Model Data ==
== Model Group ==
''TBD''
The model group consists of '''M''' model entries.


== Texture Group ==
{|class=wikitable
This section starts with a 4-byte header:
! 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.


{|class=wikitable
{|class=wikitable
|+ Model Entry Header
! Offset !! Type !! Description
! Offset !! Type !! Description
|-
|-
| 0x00 || UInt16 || '''Number of textures'''.
| 0x00 || UInt16 || '''Number of vertices''' ('''V''').
|-
|-
| 0x02 || UInt16 || {{unknown-left|'''Unknown'''.}}
| 0x02 || UInt16 || '''Number of triangles''' ('''T''').
|-
|-
| 0x04 || colspan=2 {{unknown|End of Texture Group header, start of Texture Entries}}
| 0x04 || Int32 || '''[[#Vertex Data|Vertex Data]]''' offset.
|-
| 0x08 || Int32 || '''[[#Triangle Data|Triangle Data]]''' offset.
|-
| 0x0C || UInt16 || {{unknown-left|'''Unknown'''.}}
|-
| 0x0E || UInt16 || {{unknown-left|'''Unknown'''.}}
|-
| 0x10 || colspan=2 {{unknown|End of header}}
|}
|}


=== Texture Entry ===
=== Vertex Data ===
After the texture data header there's an entry for each texture. This entry consists of a 20-byte header followed by the texture data. The textures are referenced in the [[#Texture Reference Table|Texture Reference Table]] using 4-byte UIDs.
Vertex data is stored as either 6-byte or 8-byte groups per vertex '''V''', depending on the file header's flags.


{|class=wikitable
{|class=wikitable
! Offset !! Type !! Description
! Offset !! Type !! Description
|-
|-
| 0x00 || Byte[4] || '''Texture UID'''. Referenced as is in the [[#Texture Reference Table|Texture Reference Table]].
| 0x00 || Vertex Entry['''V'''] || '''Vertex entries'''.
|}
 
{|class=wikitable
|+ Vertex Entry
! Offset !! Type !! Description
|-
|-
| 0x04 || Int32 || {{unknown-left|'''Unknown'''.}}
| 0x00 || Int16[3] || '''Vertex XYZ position'''.
|- bgcolor="#AAFFAA"
| colspan="4" align="center" | '''If [[#Header|Unknown various flag]] 0 = 1'''
|- bgcolor="#DDFFDD"
| 0x06 || UInt16 || '''Bone ID'''.
|}
 
=== Triangle Data ===
Triangle data is stored as 26-byte groups per triangle '''T'''.
 
{|class=wikitable
! Offset !! Type !! Description
|-
|-
| 0x08 || Byte || '''Texture format''':
| 0x00 || Triangle Entry['''T'''] || '''Triangle entries'''.
* 1 = A3I5
|}
* 2 = 4-Color Palette
 
* 3 = 16-Color Palette
{|class=wikitable
* 4 = 256-Color Palette
|+ Triangle Entry
* 5 = 4x4-Texel Compressed
! Offset !! Type !! Description
* 6 = A5I3
* 7 = Direct Color (RGB5551)
|-
| 0x09 || Byte || {{unknown-left|'''Unknown'''.}}
|-
|-
| 0x0A || Byte || {{unknown-left|'''Unknown'''.}}
| 0x00 || UInt16 || '''Texture ID'''. References the index from the [[#Texture Reference Table|Texture Reference Table]].
|-
|-
| 0x0B || Byte || {{unknown-left|'''Unknown'''.}}
| 0x02 || UInt16[3] || '''Vertex indices'''.
|-
|-
| 0x0C || Byte[4] || {{unknown-left|'''Unknown'''.}}
| 0x08 || UInt16[3] || '''Vertex colors'''. One per vertex, in RGBA5551 format.
|-
|-
| 0x10 || UInt16[2] || '''Texture dimensions'''.
| 0x0E || UInt16[2][3] || '''UVs'''. One set per vertex.
|-
| 0x14 || colspan=2 {{unknown|End of Texture Entry header, start of texture data}}
|}
|}
== Texture Group ==
See '''[[DKRDS Texture Group]]'''.


== Texture Reference Table ==
== Texture Reference Table ==
This section lists each 4-byte texture UID directly, in order.
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.
 
{|class=wikitable
! Offset !! Type !! Description
|-
| 0x00 || Byte[4]['''Number of Textures in [[#Texture Group|Texture Group]]'''] || '''Texture UID'''.
|}


= Tools =
= Tools =

Latest revision as of 13:58, 22 June 2024

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:
  • 0 = Divided by 16 (?)
  • 1 = Divided by 4096 (?)
0x02 UInt16 Unknown various flags. Each bit seems to correspond to a different flag:
  • 0 = If 1, bone IDs are attached to each vertex
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.

Model Entry Header
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.
Vertex Entry
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.
Triangle Entry
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)
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