ABC (File Format): Difference between revisions
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(Created page with "'''ABC''' is a file format found in Mario Kart Arcade GP DX. It defines culling areas used in tracks. = File Format = The file byte order is always little endian. == File Header == The file starts with a header that is 0x10 bytes long. {|class=wikitable ! Offset !! Type !! Description |- | 0x00 || Char[4] || '''File magic'''. Always ''ABCT'' in ASCII. |- | 0x04 || Int32 || Always 1. Maybe version? The game checks if this value is 1, otherwise it won't read the fil...") |
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'''ABC''' is a file format found in [[Mario Kart Arcade GP DX]]. | '''ABC''' ('''A'''rea '''B'''lo'''C'''k) is a file format found in [[Mario Kart Arcade GP DX]] and [[Luigi's Mansion Arcade]]. In Mario Kart Arcade GP DX it defines culling areas used in tracks, whereas in Luigi's Mansion Arcade it defines areas used for lighting. | ||
= File Format = | = File Format = | ||
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[[Category:Luigi's Mansion Arcade File Formats]] | |||
[[Category:Mario Kart Arcade GP DX File Formats]] | [[Category:Mario Kart Arcade GP DX File Formats]] | ||
Revision as of 10:53, 4 May 2026
ABC (Area BloCk) is a file format found in Mario Kart Arcade GP DX and Luigi's Mansion Arcade. In Mario Kart Arcade GP DX it defines culling areas used in tracks, whereas in Luigi's Mansion Arcade it defines areas used for lighting.
File Format
The file byte order is always little endian.
File Header
The file starts with a header that is 0x10 bytes long.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Char[4] | File magic. Always ABCT in ASCII. |
| 0x04 | Int32 | Always 1. Maybe version? The game checks if this value is 1, otherwise it won't read the file. |
| 0x08 | Int32 | Number of Culling Areas (N). |
| 0x0C | Byte[4] | Padding. |
| 0x10 | End of header, start of Culling Areas | |
Culling Areas
After the header, there are N 0x40-byte culling areas. Each area corresponds to each section of the track's VMD file, and it is made of a single 4x4 matrix that is used to transform the current position of the camera's target. The game checks once per frame if the transformed position of each area lies within a -0.5f to 0.5f AABB cube to determine the culling status.
| Offset | Type | Description |
|---|---|---|
| 0x00 | Float[16] | 4x4 matrix. |
Tools
The following tools can handle ABC files:
- (none)
