Moto Racer (1997, Windows)

[petitcoq]

Hello,

I'm currently in the process of documenting the 3DF format of Moto Racer for Windows, using 3D Model Researcher.

Frist step, all Moto Racer files are packed in BFK files, and can be extracted using QuickBMS and the corresponding script.

Second step, all 3DF files are the 3D models, and are organized the following way:

typedef struct vec3_t vec3_t;
struct vec3_t {
  float x;
  float y;
  float z;
};

 

uint16_t unknown1
uint16_t number_of_vertices
vec3_t vertices[number_of_vertices];
??? unknown2[???]; // list of faces?

 

For now I'm unable to properly render the faces, despite all of my tweaks. If anyone more experienced than me want to continue from where I left, and report its progress here, please do so.

A demo of Moto Racer for Windows is available on the Internet Archive.

Best regards.

[theone_32]

hi

i have reversed most of the game files, including 3d models files.

these are my findings on 3df and map files:

3DF file

field	size in bytes	note
header
magic	2	must be = 1
vertex list
vertex_count	2	number of vertices
vertex	12*vertex_count	3 floats
face		repeated until face_vertices = 0
face_vertices	2	number of vertices per face (3 or 4)
unknown	2
vertices_index	2*face_vertices	indices on the vertex list

 

MAP file

field	size in bytes	note
MAGIC	2	0x8001 (01 80)
unknown	510	all zeroes
face block	128*faces in 3DF	see face block format
face block format
UV per face	2	number of UV coords per face
when < 3		no UV, color is provided
color	2	RGB555
unknown	124
when 3
unknown	32
U1	4	integers 0..255
U2	4
U3	4
dummy	4
V1	4
V2	4
V3	4
dummy	4
unknown	62
when 4
unknown	32
U1	4	integers 0..255
U2	4
U3	4
U4	4
V1	4
V2	4
V3	4
V4	4
unknown	62

I've also dumped SKL and ROT files entirely, presumably skeleton and poses, but I don't have enough experience to know what to do with these.

I am attaching some dumper tools you can use on the game demo in the first post; i might have misnamed or misinterpreted some values; if anyone wants to give some hints it would be appreciated.

 

 

rot_dumper.py skldumper.py

Edited 16 hours ago by theone_32