FF8/FileFormat X

By MaKiPL. Thanks for help in research for: shakotay2 (XeNTaX), Halfer, Yagami Light.

Info

.X file is uncompressed 3D stage model with texture embedeed. The file contains basic info (currently unknown, probably for editor?), camera data, movement, translations and geometry data.

Name	Usually starting with:	Description
Info/Script	E8 FF BD 27 01 00 02	Currently unknown. Probably header + info, that is not needed in game itself. Can be null'ied and nothing will happen ingame.
Camera data + movement	02 00 08 00 20 00 (usually 0x5d4/8)	Camera animations, movement (pre-keyed)
Geometry	01 00 00 00 08 (See geometry section info)	Divides to object and it's sub-objects
Texture	01 00 00 00 09 (Always)	Contains one .TIM texture

Info/Script

Currently unknown, takes up to ~1400 bytes from start. Unused in-game. Can be null'ied and nothing happen.

Camera data

Offset	Length	Description
0	2 bytes	Number of cameras
2	2 bytes	Number of camera animations?
?? / Camera data	Varies	Currently unknown

Camera data contains:

1. Prekeyed camera movement
2. Camera zoom
3. Camera FOV (horizontal and vertical)
4. Orthogenical projection
5. Rotation
6. Special effects like earthquake
7. More, unknown?

This file does not contain camera animations for victory, summons and etc.

Geometry

Geometry contains groups, that contains objects. Ground plane is always 1 object, so it's easy to find geometry data by searching for "Usually starting" header as seen in info section. The group contains objects and location to every start of object

Group

Offset	Length	Description
0	4 bytes	Number of objects in group
4	4 bytes	Position of object 1
8 / varies	4 bytes	Position of next objects, if number of objects != 1

Object

Offset	Length	Description
0	4 bytes	Always 01 00 01 00 / Header of object
4	2 bytes	Uint16 / number of vertices.
6	Number of vertices * 6	Vertex data, short X; short Y; short Z;
6 + (Number of vertices *6)	(AbsolutePosition MOD 4) + 2	Padding
varies (just after above)	2 bytes	uint16 / number of triangles
varies (just after above)	2 bytes	uint16 / number of quads
varies (just after above)	4 bytes	padding
varies (just after above)	number of triangles * 20	Triangle data. If NumOfTriangles = 0, then instead of any triangle data, there's quad data.
varies (just after above)	number of quads * 24	Triangle data. If NumOfQuads = 0, then instead of any quad data, there's either next header 01 00 01 00, or end of group.

Triangle

Name	Type	Description
F1 (A)	uint16	A of face indice
F2 (B)	uint16	B of face indice
F3 (C)	uint16	C of face indice
U1	Byte	U of first texture coordinate
V1	Byte	V of first texture coordinate
U2	Byte	U of second texture coordinate
V2	Byte	V of second texture coordinate
Texture related	2 bytes	Texture related (?)
U3	Byte	U of third texture coordinate
V3	Byte	V of third texture coordinate
Texture related	2 bytes	Texture related (?)
Red	Byte	Texture colourization (Red)
Green	Byte	Texture colourization (Green)
Blue	Byte	Texture colourization (Blue)
Texture ID	Byte	Texture ID

Quad

Name	Type	Description
F1 (A)	uint16	A of face indice
F2 (B)	uint16	B of face indice
F3 (C)	uint16	C of face indice
F4 (D)	uint16	D of face indice
U1	Byte	U of first texture coordinate
V1	Byte	V of first texture coordinate
Texture related	2 bytes	Texture related (?)
U2	Byte	U of second texture coordinate
V2	Byte	V of second texture coordinate
Texture related	2 bytes	Texture related (?)
U3	Byte	U of third texture coordinate
V3	Byte	V of third texture coordinate
U4	Byte	U of fourth texture coordinate
V4	Byte	V of fourth texture coordinate
Red	Byte	Texture colourization (Red)
Green	Byte	Texture colourization (Green)
Blue	Byte	Texture colourization (Blue)
Texture ID	Byte	Texture ID

Texture

Contains one TIMs with various size 512x256, 673x256, 768x256 (8BPP).