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alecss131, posted Wed Feb 22, 2023 12:54 pm (75540)

---

I found this description

Code:

RpHAnimAnimation   .anm

HAnimAnimation chunk header (0x1B)
   RwInt32                     0x100
   RwInt32                     interpolation type id (1 = RpHAnimStd)
   RwInt32                     numFrames
   RwInt32                     flags
   RwReal                      duration
   numFrames*sizeof(keyFrame)  key frames

serialized format of RpHAnimStdKeyFrame:
   RwReal      time
   RtQuat      q     // quaternion describing rotation
   RwV3d       t     // position
   RwInt32     prev  // should be offset of previous key frame from beginning of frame data but appears to be junk

PS2 .ska (skeletal animation) are almost the same format.
They have no chunk header nor the first two ints (so a file starts at numFrames directly).
In key frames the time comes after t, not before q.

But this wrong.
My data is

Code:

1B 00 00 00 3C 09 00 00 65 00 02 1C 00 01 00 00 
03 11 00 00 74 00 00 00 00 00 00 00 89 88 88 3D 
C6 B4 96 BE 8D 33 DD BE 27 D1 91 BD 00 00 80 3F 
4E 4E 11 40 00 00 80 3F ...

where

Code:

1B 00 00 00 - chunk id (Anim Animation)
3C 09 00 00 - size (without this header, after version) - 2364
65 00 02 1C - engine version 3.7.0.1
00 01 00 00 - Version: animation's version format (in all GTAs - 1.0 (0x100))
03 11 00 00 - Type: defines the frame format, 0x01 - normal,  0x02 - compressed, but what this (03 11) means?
74 00 00 00 - Frames: number of frames defined in the container - 116
00 00 00 00 - Flags

after follow 7 floats (28 bytes), unknown and numframes of char[8] numframes of char[12] (you can clearly see the different structure of bytes in these 2 parts, and therefore divided), or just numframes of char[20].
if type 0x01 then 36 bytes per frame, if 0x02 then 22 bytes per frame, but i have only 20
File example in attachment
Found a pattern in anm files. After 7 unknown floats follow this struct

Code:

struct ver1{
    int8_t un[4];
    float time;
};

After some research
Standard header, with new unknown field

Code:

struct Head {
    uint32_t version; //always 0x100, gta
    uint32_t type; //always 0x1103
    uint32_t count; //number of "packets"
    uint32_t flags; //always 0
    float length; //time length of animation
    float unknown[6];
};

Then 2 structures follow with number of number of packets each

Code:

struct Data0{ 
    int8_t unknown[4];
    float time;
};
struct Data1{
    int8_t unknown[12];
};

Together

Code:

struct File{
    uint32_t type; //0x1B anim animation
    uint32_t size;
    uint32_t version; //engine version 3.7.0.1
    Head head;
    Data0 data0[head.count];
    Data1 data1[head.count];
};

For now trying to understand the structure of data0. Unknown 4 bytes, then time goes by. First comes the number of structures with zero time equal to the number of bones. Then there are packets with other times, and there are as many packets with a finite time as there are bones, and there are no more intermediate ones than bones.
A few words about the unknown 4 bytes. Packets with zero time of the last bit always have 0x83 and one common penultimate, and all the others packets have two last bytes 0. At the same time, there are a lot of repetes.
Judging by the timestamps and the total animation time, the frame rate is always 30 fps. Time step always 0.0333.
Found in the documentation words about the order of frames.

Quote:

The keyframe data does not contain an explicit link to the node it will be applied to. Instead, it is determined implicitly from the ordering of the keyframes in the array. For data cache coherence, the keyframes are sorted in time order.
Each and every node has a keyframe at the beginning and end of the
animation. Then there are optional additional keyframes in-between. The first keyframe is stored for each node in turn, then the second for each node in turn. These are used to initialize the first interpolation for each node.

An unordered array of keyframes may be sorted in a conventional way
using the following as primary and secondary sort keys:
1. The time of the previous keyframe for the node
2. The node index

I have 53 bones (nodes) and frames (packets) ordered by this (hopefully right ) for PC_TG_LockOn_Idle.anm
format string: data0.unknown * data1.unknown # data0.unknown * data1.unknown #

Code:

B8 41 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
CC 41 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
E0 41 38 83 * 7E EB A6 7D EB DF B3 49 90 9C 5C 18  #  24 04 00 00 * 7E EB A6 7D EB DF B3 49 90 9C 5C 18  #  
F4 41 38 83 * 80 00 88 7C FE 0F 5A 4B DE 2B 89 12  #  24 04 00 00 * 80 00 88 7C FE 0F 5A 4B DE 2B 89 12  #  
08 42 38 83 * 8D C6 78 6A CC 2F 21 64 5C 2C 3E 0F  #  24 04 00 00 * 8D C6 78 6A CC 2F 21 64 5C 2C 3E 0F  #  
1C 42 38 83 * 7E 14 D8 9D C6 CF 41 51 00 00 C2 15  #  24 04 00 00 * 7E 14 D8 9D C6 CF 41 51 00 00 C2 15  #  
30 42 38 83 * 79 F3 F7 7E FB 2F 41 50 7E 02 00 00  #  24 04 00 00 * 79 F3 F7 7E FB 2F 41 50 7E 02 00 00  #  
44 42 38 83 * 80 00 08 80 FF 0F 5A 4B EC 25 38 2E  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B EC 25 38 2E  #  
58 42 38 83 * 72 E8 45 84 AA CF 92 32 5C 2C 3E 0F  #  24 04 00 00 * 72 E8 45 84 AA CF 92 32 5C 2C 3E 0F  #  
6C 42 38 83 * 80 EF B7 97 DB FF 73 45 00 00 C2 15  #  24 04 00 00 * 80 EF B7 97 DB FF 73 45 00 00 C2 15  #  
80 42 38 83 * 8E 8B D7 6D D9 4F 72 46 7E 02 00 00  #  24 04 00 00 * 8E 8B D7 6D D9 4F 72 46 7E 02 00 00  #  
94 42 38 83 * 80 00 08 80 FF 0F 5A 4B EC 25 38 2E  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B EC 25 38 2E  #  
A8 42 38 83 * 7A 37 87 7E F3 DF 5A 4B EC 37 15 11  #  24 04 00 00 * 7A 37 87 7E F3 DF 5A 4B EC 37 15 11  #  
BC 42 38 83 * 7F 2B B7 8A EC CF 5A 4B C4 3E 52 10  #  24 04 00 00 * 7F 2B B7 8A EC CF 5A 4B C4 3E 52 10  #  20 03 00 00 * 7F 2B B7 8A EC CF 5A 4B C4 3E 52 10  #  
D0 42 38 83 * 80 2C 97 88 EF DF 5A 4B 73 42 0B 10  #  24 04 00 00 * 80 2C 97 88 EF DF 5A 4B 73 42 0B 10  #  20 03 00 00 * 80 2C 97 88 EF DF 5A 4B 73 42 0B 10  #  
E4 42 38 83 * 81 AC C7 85 FB 7F 5A 4B F2 3F 2E 0B  #  24 04 00 00 * 81 AC B7 85 FB 7F 5A 4B F2 3F 2E 0B  #  20 03 00 00 * 81 AC C7 85 FB 7F 5A 4B F2 3F 2E 0B  #  
F8 42 38 83 * 7E 94 E9 79 D4 CF C8 5D DD 32 A6 25  #  24 04 00 00 * 7E 94 E9 79 D4 DF C8 5D DD 32 A6 25  #  20 03 00 00 * 7E 94 E9 79 D4 CF C8 5D DD 32 A6 25  #  
0C 43 38 83 * 4E 06 18 5A F7 1E 1E 6C B1 30 33 04  #  24 04 00 00 * 4E 06 18 5A F7 1E 1E 6C B1 30 33 04  #  
20 43 38 83 * 73 89 31 7F A1 0C 08 96 D2 2F 63 0D  #  24 04 00 00 * 73 89 31 7F A1 0C 08 96 D2 2F 63 0D  #  
34 43 38 83 * 7B D1 97 7A FB BF D8 92 D0 2F FF 1B  #  24 04 00 00 * 7B D1 97 7A FB BF D8 92 D0 2F FF 1B  #  
48 43 38 83 * 58 8A 36 A5 15 3F 39 54 51 2F 39 1B  #  24 04 00 00 * 58 8A 36 A5 15 3F 39 54 51 2F 39 1B  #  
5C 43 38 83 * 8C 11 9A 8F 9E FF D0 57 05 32 03 10  #  24 04 00 00 * 8C 11 9A 8F 9E FF D0 57 05 32 03 10  #  
70 43 38 83 * 8B 00 08 80 F7 3F 16 5C B6 30 C3 10  #  24 04 00 00 * 8B 00 08 80 F7 3F 16 5C B6 30 C3 10  #  
84 43 38 83 * 7C 26 04 F0 21 B8 B0 55 27 31 58 17  #  24 04 00 00 * 7C 26 04 F0 21 B8 B0 55 27 31 58 17  #  
98 43 38 83 * 82 78 AA F9 F4 07 0A 54 B6 30 3A 12  #  24 04 00 00 * 82 78 AA F9 F4 07 0A 54 B6 30 3A 12  #  
AC 43 38 83 * 7C 30 64 F0 01 F8 26 53 B6 30 3A 12  #  24 04 00 00 * 7C 30 64 F0 01 F8 26 53 B6 30 3A 12  #  
C0 43 38 83 * 38 00 08 80 A0 6E AB 57 11 30 20 11  #  24 04 00 00 * 28 00 08 80 CF 3D AB 57 11 30 20 11  #  6C 02 00 00 * 1A 00 08 80 D8 4C AB 57 11 30 20 11  #  
D4 43 38 83 * 26 88 67 85 A8 2D DB 57 69 2F 21 11  #  24 04 00 00 * 2E 82 A7 81 27 BE DB 57 69 2F 21 11  #  6C 02 00 00 * 38 6F 17 7E 94 0E DB 57 69 2F 21 11  #  
E8 43 38 83 * 80 00 38 91 EC 0F 5A 4B FA 3D EB 18  #  24 04 00 00 * 80 00 38 91 EC 0F 5A 4B FA 3D EB 18  #  6C 02 00 00 * 80 00 38 91 EC 0F 5A 4B FA 3D EB 18  #  
FC 43 38 83 * 6D 77 7B 6F 0A FF 5A 4B 15 38 3E 16  #  24 04 00 00 * 6D 77 7B 6F 0A FF 5A 4B 15 38 3E 16  #  
10 44 38 83 * 7E 14 18 7E FE FF 6B 52 29 3A F7 26  #  24 04 00 00 * 7E 14 18 7E FE FF 6B 52 29 3A F7 26  #  
24 44 38 83 * 7E 14 18 7E FE FF 7F 42 DF 39 F2 26  #  24 04 00 00 * 7E 14 18 7E FE FF 7F 42 DF 39 F2 26  #  
38 44 38 83 * 6B 15 38 FE BA 87 EB 38 D0 32 AB 25  #  24 04 00 00 * 6B 13 38 FE BB 87 EB 38 D0 32 AB 25  #  30 02 00 00 * 6B 15 38 FE BA 87 EB 38 D0 32 AB 25  #  
4C 44 38 83 * 4A 85 75 8B CA AE 95 2A AF 30 37 20  #  24 04 00 00 * 4A 85 75 8B CA AE 95 2A AF 30 37 20  #  
60 44 38 83 * 88 9E 81 73 B9 1C 00 00 9A 31 11 17  #  24 04 00 00 * 88 9E 81 73 B9 1C 00 00 9A 31 11 17  #  
74 44 38 83 * 7C 52 67 7C F5 8F DB 03 9D 31 75 08  #  24 04 00 00 * 7C 52 67 7C F5 8F DB 03 9D 31 75 08  #  
88 44 38 83 * 9B 66 4F A4 0E 49 3D 44 0E 32 93 0A  #  24 04 00 00 * 9B 66 4F A4 0E 49 3D 44 0E 32 93 0A  #  
9C 44 38 83 * A7 49 B9 64 4B AF 5C 58 F7 31 A5 15  #  24 04 00 00 * A7 49 B9 64 4B AF 5C 58 F7 31 A5 15  #  E0 01 00 00 * A7 49 B9 64 4B AF 5C 58 F7 31 A5 15  #  
B0 44 38 83 * 67 00 08 80 D9 BF 9D 3A B6 30 B0 13  #  24 04 00 00 * 67 00 08 80 D9 BF 9D 3A B6 30 B0 13  #  
C4 44 38 83 * 8C 8D FE C6 2A D7 54 42 17 32 13 0C  #  24 04 00 00 * 8C 8D FE C6 2A D7 54 42 17 32 13 0C  #  
D8 44 38 83 * E2 3A 88 66 E1 0C D9 54 B8 30 BA 14  #  24 04 00 00 * E2 3A 88 66 E1 0C D9 54 B8 30 BA 14  #  
EC 44 38 83 * CB 47 28 66 3D 8E 88 52 B8 30 2F 14  #  24 04 00 00 * CB 47 28 66 3D 8E 88 52 B8 30 2F 14  #  
00 45 38 83 * 5D 49 59 F9 7B E8 76 45 59 36 6F 10  #  24 04 00 00 * 5D 49 59 F9 7B E8 76 45 59 36 6F 10  #  
14 45 38 83 * 31 7D 18 76 42 7E 08 3F 5C 31 53 13  #  24 04 00 00 * 2C 3E D8 7B 0A 6E 08 3F 5C 31 53 13  #  7C 01 00 00 * 27 F8 27 81 C9 CD 08 3F 5C 31 53 13  #  
28 45 38 83 * 2D 00 08 80 20 DE D8 3E 03 32 52 13  #  24 04 00 00 * 1E 00 08 80 2E 9D D8 3E 03 32 52 13  #  
3C 45 38 83 * 80 00 38 96 DF 0F 95 6A 0B 29 56 4C  #  24 04 00 00 * 80 00 38 96 DF 0F 95 6A 0B 29 56 4C  #  
50 45 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
64 45 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
78 45 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
8C 45 38 83 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B B6 30 3A 12  #  
A0 45 38 83 * 80 00 08 80 FF 0F 5A 4B FE FF EA 17  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B FE FF EA 17  #  
B4 45 38 83 * 80 00 08 80 FF 0F 5A 4B BB 3B 9E 12  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B BB 3B 9E 12  #  
C8 45 38 83 * 80 00 08 80 FF 0F 5A 4B 3A EC A4 14  #  24 04 00 00 * 80 00 08 80 FF 0F 5A 4B 3A EC A4 14  # 

it turns out 12 bytes per frame, not counting the first 4. it remains to understand how to decrypt them

In the end, it remains to decrypt (understand how and what is stored) in 12 bytes per frame at the bone
for example to decrypt

Code:

80 00 08 80 FF 0F 5A 4B B6 30 3A 12

alecss131, posted Wed Feb 22, 2023 6:45 pm (75546)

---

Maybe this part of the MaxScript from another game will help

Code:

private fn DecompressFloat compressed =
(
   local floatInt = bit.shift (bit.and compressed 0x8000) 16
   if ((bit.and compressed 0x7fff) != 0) then
   (
      floatInt = bit.or floatInt ((bit.shift (bit.and compressed 0x7800) 12)   0x38000000)
      floatInt = bit.or floatInt (bit.shift (bit.and compressed 0x07ff) 12)
   )

   bit.intasfloat floatInt
)

But I don't understand how it works, but I don't want to setup 3DsMax. I hate languages without normal typing
Read 16 bit unsigned integer, run through this script
Can someone help translate it correctly and competently into C/C (or any other typed language with explicit indication of variable sizes)? And then my attempts give incorrect and strange results