Wexos: Imported from avsys wiki

2024-05-01T17:08:00Z

Imported from avsys wiki

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'''BFG''' ('''B'''inary '''F'''o'''G''') files are one of the multiple [[post-effect]] controllers [[Mario Kart Wii]] provides. It controls fog used in tracks, and they appear in the "./posteffect" folder inside [[U8 (File Format)|U8 file]]s.

= File Format =
The file byte order is always big endian. The structure of the file is based in four fog entries, where each entry is 0x1C bytes long.

{|class=wikitable
! Offset !! Type !! Description
|-
| 0x00 || Int32 || '''Fog type''':
* 0x00 = No fog.
* 0x01 = Perspective projection linear.
* 0x02 = Perspective projection exponential.
* 0x03 = Perspective projection exponent squared.
* 0x04 = Perspective projection inverse exponent.
* 0x05 = Perspective projection inverse of the square exponent.
* 0x06 = Orthographic projection linear.
* 0x07 = Orthographic projection exponential.
* 0x08 = Orthographic projection exponent squared.
* 0x09 = Orthographic projection inverse exponent.
* 0x0A = Orthographic projection inverse of the square exponent.
|-
| 0x04 || Float || '''StartZ'''. The Z-value where fog generation begins inside the view space.
|-
| 0x08 || Float || '''EndZ'''. The Z-value at which fog density is maximum inside the view space.
|-
| 0x0C || Byte[4] || '''Fog color''', stored in RGBX format (alpha is ignored).
|-
| 0x10 || UInt16 || '''Fog range correction'''. 0 = Disabled, 1 = Enabled.
|-
| 0x12 || UInt16 || {{Unknown-left|Maybe center to which the range correction is applied?}}
|-
| 0x14 || Float || Affects the transition speed when swapping fog entries. 1.0 is instant; lower values create longer fades. Whether it affects swapping to this entry, from this entry, or both is unknown.
|-
| 0x18 || UInt16 || {{Unknown-left|'''Unknown'''. 0 in most Nintendo tracks, 5544 in N64 DK's Jungle Parkway.}}
|-
| 0x1A || UInt16 || {{Unknown-left|'''Unknown'''.}}
|-
| 0x1C || colspan=2 {{unknown|End of fog entry}}
|}

= Tools =
The following tools can handle BFG files:
* [[FogConv]], by [[Atlas]]
* [[Post-Effect Editor]], by [[Wexos]]

[[Category:Mario Kart Wii File Formats]]

BFG (File Format) - Revision history

Wexos: Imported from avsys wiki