3D model format

tores 3D models, more investigation needed

Thanks to Martin for initial format reversing.

• Magic - PMD V1.83
  • some files use version 1.82 instead, but they aren't used by the game, the engine won't recognise anything other than 1.83
  • There is one unused mention of "PMD V1.71" in the game binary

Offset	Size	Description
0x0	0x18?	Magic - "PMD V1.83"
0x18	0x4	Type - 0 = shadow & skybox; 1 = track; 2 = car
0x1C	0x4	Zeroes?
0x20	0x94?	offsetsTable? array of 37 ints, might need to add constant 0x148 for elements 0-12
0xB4	0x94?	Sizes of data chunks ,array of 37 ints

offsets1Table

• Looks like indexes 12, 13, 19, 34, and 35 are always set to 0 in all known models
• 14-33 (minus 19 of course) is only set if the type is set to track (1)
• I was off by 3 bytes, need to redo that part

You have to add 0x148 to each value to get proper pointers (works with elements 0-12, later ones will probably need different bias)

All blocks (or at least 0-11) are 32-bytes aligned, 12 is aligned so that the next block is 32-bit aligned

id	offset	Description
0	0x20
1	0x24	according to martinz it holds polygons data
2	0x28	according to martinz it holds uv texture data
3	0x2c	according to martinz it holds vertex data
4	0x30	Mesh data? Always points to 0x1E, according to martinz it holds faces data0
5	0x34	Textures names
6	0x38	Offsets to texture names, absolute addresses in file
7	0x3c	Each element is 16B long, ?, ?, float, float
8	0x40	Holds IDs of elements in 7
9	0x44	according to martinz it holds surface transforms data
10	0x48	according to martinz it holds surfaces data
11	0x4c	Offset is 0x160, size 0x68
12	0x50	Offset is 0x0; the size is non-zero, for shadow it's 1, with one 00 byte
13	0x54
14	0x58
15	0x5c
16	0x60
17	0x64
18	0x68
19	0x6c
20	0x70
21	0x74
22	0x78
23	0x7c
24	0x80
25	0x84
26	0x88
27	0x8c
28	0x90
29	0x94
30	0x98
31	0x9c
32	0xa0
33	0xa4
34	0xa8
35	0xac
36	0xb0