FF8/FileFormat DAT

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Revision as of 22:29, 7 December 2010 by my_wiki>Myst6re
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By Mirex, JWP and myst6re.

Contents

Header

DAT file is divided into 11 sections (except for c0m127.dat, which contains only 2 sections : 7th and 8th).

Offset Length Description
0 4 bytes Number of sections (always =11, except for c0m127.dat)
4 nbSections * 4 bytes Section Positions
4 + nbSections * 4 4 bytes File size

Section 1: Skeleton

Offset Length Description
0 2 bytes Number of bones
2 14 bytes Unknown
16 Number of bones * 48 bytes Bones

Bone struct

Offset Length Description
0 2 bytes Parent id
2 2 bytes Bone size
4 44 bytes Unknown (often empty)

Section 2: Model geometry

Header (data sub table)

Offset Length Description
0 4 bytes Number of objects
4 nbObjects * 4 bytes Object Positions

Object Data

Offset Length Description
0 2 bytes Number of Vertices Data
2 Varies * NbVerticesData Vertices Data
Varies absolutePosition % 4 Padding (0x00)
Varies 2 bytes Num triangles
Varies 2 bytes Num quads
Varies 8 bytes Padding (0x00)
Varies numTriangles * 16 bytes Triangles
Varies numQuads * 20 bytes Quads
Varies 4 bytes Total number of vertices (may be not visible)

Vertice Data

Offset Length Description
0 2 bytes Bone id
2 2 bytes Number of vertices
4 nbVertices * 6 bytes Vertices (nbVertices * 3 shorts)

Useful structures

typedef struct {
     sint16	x, y, z;
} vertice;

(sizeof = 6)

typedef struct {
     uint16	vertex_indexes[3];
     uint8	texCoords1[2];
     uint8	texCoords2[2];
     uint16	textureID_related;
     uint8	texCoords3[2];
     uint16	u; // textureID_related2
} triangle;

(sizeof = 16)

typedef struct {
     uint16	vertex_indexes[4];
     uint8	texCoords1[2];
     uint16	textureID_related;
     uint8	texCoords2[2];
     uint16	u; // textureID_related2
     uint8	texCoords3[2];
     uint8	texCoords4[2];
} triangle;

(sizeof = 20)

Section 3: Model animation

Header (data sub table)

Offset Length Description
0 4 bytes Number of animations
4 nbAnimations * 4 bytes Animations Positions