ABC (File Format) - Revision history

Atlas at 10:57, 4 May 2026

2026-05-04T10:57:11Z

← Older revision		Revision as of 10:57, 4 May 2026
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	\| 0x04 \|\| Int32 \|\| Always 1. Maybe version? The game checks if this value is 1, otherwise it won't read the file.		\| 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\|~~Culling~~ Areas]]''' ('''N''').		\| 0x08 \|\| Int32 \|\| '''Number of [[#Areas\|Areas]]''' ('''N''').
	\|-		\|-
	\| 0x0C \|\| Byte[4] \|\| '''Padding'''.		\| 0x0C \|\| Byte[4] \|\| '''Padding'''.
	\|-		\|-
	\| 0x10 \|\| colspan=2 {{unknown\|End of header, start of ~~Culling~~ Areas}}		\| 0x10 \|\| colspan=2 {{unknown\|End of header, start of Areas}}
	\|}		\|}

	== ~~Culling~~ Areas ==		== 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.		After the header, there are '''N''' 0x40-byte areas. Each area corresponds to each section of a corresponding [[VMD]] file. In Luigi's Mansion Arcade, it also references the sections from an [[ABT]] file. The area is made of a single 4x4 matrix. In Mario Kart Arcade GP DX this matrix 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.

	{\|class=wikitable		{\|class=wikitable
	\|+ ~~Culling~~ Area		\|+ Area
	! Offset !! Type !! Description		! Offset !! Type !! Description
	\|-		\|-

Atlas at 10:53, 4 May 2026

2026-05-04T10:53:02Z

← Older revision		Revision as of 10:53, 4 May 2026
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	'''ABC''' is a file format found in [[Mario Kart Arcade GP DX]]. It defines culling areas used in tracks.		'''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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	* (none)		* (none)

			[[Category:Luigi's Mansion Arcade File Formats]]
	[[Category:Mario Kart Arcade GP DX File Formats]]		[[Category:Mario Kart Arcade GP DX File Formats]]

Atlas: 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..."

2025-07-05T17:55:45Z

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..."

New page

'''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 file.
|-
| 0x08 || Int32 || '''Number of [[#Culling Areas|Culling Areas]]''' ('''N''').
|-
| 0x0C || Byte[4] || '''Padding'''.
|-
| 0x10 || colspan=2 {{unknown|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.

{|class=wikitable
|+ Culling Area
! Offset !! Type !! Description
|-
| 0x00 || Float[16] || '''4x4 matrix'''.
|}

= Tools =
The following tools can handle ABC files:
* (none)

[[Category:Mario Kart Arcade GP DX File Formats]]