League of legends model problems....

[fatduck]

Got it!
Indeed, it is using that 15-bit nonsense format:

assume those 3-15-15-15 value are axisflag s2 s1 s0

Code: Select all

  s0 = 1.41421*(s0-0x3FFF)/0x7FFF
  s1 = 1.41421*(s1-0x3FFF)/0x7FFF
  s2 = 1.41421*(s2-0x3FFF)/0x7FFF
  s3 = sqrt(1-(s0^2+s1^2+s2^2))

  case AxisFlg of (
   3: return (quat s2 s1 s0 s3)
   2: return (quat s2 s1 s3 s0)
   1: return (quat s2 s3 s1 s0)
   0: return (quat s3 s2 s1 s0)
  )--end case

[shakotay2]

wow, you're absolutely incredible!

checked this with

730b 5dFB c15F
011 100110000101101 011101111110111 100000101011111

which should uncompress to
float x=0.134586, y=-0.044547, z=0.015197, w=0.989783 ;

and, yes, it works!

Only "issue" I have is that x and z values are swapped.
edit: errr, I mixed the params s0 and s2, sry

[fatduck]

Sorry, I didn't check on the actual animation yet, but

In my defination 3-15-15-15 in axisFlag s2 s1 s0 (High to low)
so:
730b 5dFB c15F
011 100110000101101 011101111110111 100000101011111
3 4C2D 3BF7 415F

calculate by hand:

axisFlag = 3 (quat s2 s1 s0 s3)
s2 = 0x4C2D =result=> 0.13457157444990386669515060884426
s1 = 0x3BF7 =result=> -0.044540687887203588976714377269814
s0 = 0x415F =result=> 0.015192172612689596240119632557146

exactly = quat x=0.134586, y=-0.044547, z=0.015197, w=0.989783 !?

PS:
Just before I forgot about the indices part of the animation

Code: Select all

Struct AmnIdx_ver_4 {
   dword        Bone_Hash
   word         Index_of_Translation    //Reference to Translation_Table
   word         Index_of_Scale          //Reference to Translation_Table(Vector3_Table)
   word         Index_of_Rotation       //Reference to Rotation_Table
   word         null        
}

Struct AmnIdx_ver_5 {
   word         Index_of_Translation    //Reference to Translation_Table
   word         Index_of_Scale          //Reference to Translation_Table(Vector3_Table)
   word         Index_of_Rotation       //Reference to Rotation_Table
}

[krolik]

Guys, you did an incredible work!!!

I don't want to bother you, but could any one explain this stuff on the example? I am not a total noob, but want to understand the algorithm to convert this logic into code.

[shakotay2]

@Fatduck: you're right (as always)
Stupid me called such a function:
Quat Fatduck_quatDecompress(short AxisFlag, short s0, short s1, short s2)
but passed AxisFlag, s2, s1, s0 to it.

@krolik: you've to be more precise. (Do you mean "C" code?)

[Wobble]

[out]

[krolik]

@krolik: you've to be more precise. (Do you mean "C" code?)

Actually C++, but I would like to understand the logic even in pseudo code.

[krolik]

I was tried to understand all your discussion and stuck at the point that I totally got lost.
Could someone share his code here how to read this anm file?

[krolik]

As I finished coding, I would like to share an additional information. Maybe, it would be helpful for someone.

The right CASE for decompression will look like:

Code: Select all

  
case AxisFlg of (
   3: return (quat s0 s1 s2 s3)
   2: return (quat -s0 -s1 -s3 -s2)
   1: return (quat s0 s3 s1 s2)
   0: return (quat s3 s0 s1 s2)
)

The header block changed his structure:

Code: Select all

struct LoL_Header_Data (
   char magic[8]; //always r3d2anmd
   int version;
   int data_size; //size of file = data_size + 12
   char skip1[12]; //skip this block
   int num_bones;
   int num_frames;
   float fps;
   int data_offset1;
   char skip2[8]; 
   int data_offset2;
   int data_offset3;
   int data_offset4;
   char skip3[12];
)
num_pos = (data_offset3 - data_offset2)/12;
num_quat = (data_offset1 - data_offset3)/6;

[hypnolem]

wow

[Doctor Loboto]

So uh, hate to be a bother again, but is there a completed Noesis Script after all this information, or a method of editing the models so they can be viewed? I went over the whole topic but this is a bit over my head...

[finitebytes]

So, theoretically, could we get the work done here patched into Riotfiletranslator so that the new model formats can be opened as well has have files saved into that same format?

[vossphorus]

Hey guys,

First off: I'm really amazed by your detective work on the new *.anm files!

I'm pretty new to this community but I've read all recent posts about League of Legends and it's depending file formats.
I hope I don't ask for something which is already covered somewhere else.

Since the import/export scripts for Maya and Blender are outdated and no longer supported by the developers there's (imho) a need for a simple way to import, modify and export the models.
I'm willing to write an import/export script for Blender (I decided to go with Blender since it's free) but I need some help by a few professionals on this topic.
I've already opened and analyzed the *.skn and *.skl files in a hex editor but I don't quite grasp how it's structured (mainly because I'm relying on old references).

Please don't be too harsh if there's a major fallacy in my naive approach .
It would be really awesome if someone could explain to me how the position of vertices and faces (etc.) is represented in the files.

Thanks in advance

[shakotay2]

I'm willing to write an import/export script for Blender (I decided to go with Blender since it's free)
[...]
It would be really awesome if someone could explain to me how the position of vertices and faces (etc.) is represented in the files.

Afair there's nothing special with the static mesh. Vertex stride of the Twitch is 52 bytes.
Use hex2obj or Noesis to export this model as a wavefront obj. (View posts in this thread as of Thu Apr 17, 2014 1:38 pm
and Thu Apr 17, 2014 3:45 pm.)

[vossphorus]

Use hex2obj or Noesis to export this model as a wavefront obj.

I did that already. But there's no way to export *.obj files to *.skn files to create remodels for the game.

But could you please elaborate on the structure of the file itself? What's in the header and where does it end? How are the vertex strides themselves structured?
And maybe someone could take a look at this resource and tell me if it's still useable or just totally outdated: https://code.google.com/p/lolblender/wiki/fileFormats.

I'm sorry to bother you with these questions but I'm not a pro at this and I'm still in the process of figuring out what is what.