3D model format: Difference between revisions

Revision as of 20:56, 31 December 2020

Stores 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 in PC version won't recognise anything other than 1.83
- There is one unused mention of PMD V1.71 in the game binary

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

Blocks 0-11 are 32-bytes aligned, 12 is unaligned and starts directly after this table.

ID	offset	size offset	Description
0	0x20	0xb4	track stuff???
1	0x24	0xb8	polygons data?
2	0x28	0xbc	UV texture data?
3	0x2c	0xc0	vertex data?
4	0x30	0xc4	faces data?
5	0x34	0xc8	Textures names
6	0x38	0xcc	Offsets to texture names, absolute addresses in file
7	0x3c	0xd0	Each element is 16B long, ?, ?, float, float
8	0x40	0xd4	Holds IDs of elements in 7
9	0x44	0xd8	surface transforms data?
10	0x48	0xdc	surfaces data?
11	0x4c	0xe0
12	0x50	0xe4	Offset is 0x0; the size is non-zero, for shadow it's 1, with one `00` byte, size is checked for tracks
13	0x54	0xe8
14	0x58	0xec	track stuff
15	0x5c	0xf0	track stuff
16	0x60	0xf4	track stuff
17	0x64	0xf8
18	0x68	0xfc
19	0x6c	0x100
20	0x70	0x104
21	0x74	0x108	track stuff
22	0x78	0x10c	track stuff
23	0x7c	0x110	track stuff
24	0x80	0x114	track stuff
25	0x84	0x118	track stuff
26	0x88	0x11c	track stuff
27	0x8c	0x120	track stuff
28	0x90	0x124	track stuff
29	0x94	0x128	track stuff
30	0x98	0x12c	track stuff
31	0x9c	0x130	track stuff
32	0xa0	0x134	track stuff
33	0xa4	0x138
34	0xa8	0x13c
35	0xac	0x140
36	0xb0	0x144

@@ Line 27: / Line 27: @@
 |0x20
 |0x94?
-|offsetsTable? array of 37 ints, might need to add constant 0x148 for elements 0-12
+|[[3D model format#OffsetsTable|offsetsTable]]
 |-
 |0xB4
 |0x94?
-|Sizes of data chunks ,array of 37 ints
+|[[3D model format#OffsetsTable|offsetsTable]] sizes
 |}
-=== offsets1Table ===
+== offsetsTable ==
-* Looks like indexes 12, <s>13, 19, 34, and 35</s> are always set to 0 in all known models
+You have to add '''0x148''' to each value to get proper pointers to elements 0-12 (later ones will probably need different bias)
-* <s>14-33 (minus 19 of course) is only set if the type is set to track (1)</s>
-* 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)
+Blocks 0-11 are 32-bytes aligned, 12 is unaligned and starts directly after this table.
-All blocks (or at least 0-11) are 32-bytes aligned, 12 is aligned so that the next block is 32-bit aligned
 {| class="wikitable"
 !ID