Ys Online

[Darkstar]

Hiya!

Recently, a new MMORPG has entered open beta: Ys Online.

I think the 3D models are inside the XAC/XSM format. A quick search on google showed that some sim city game also uses an XAC format, but I didn't find any suitable viewer to try out. Maybe someone else can help out.

I uploaded a sample of some XAC/XSM files extracted from the data files here:
http://www.filefactory.com/file/ahah01b/n/xac_xsm_zip
There's also a Total Commander plugin to unpack the *.yfm files inside to extract all the other data as well.

Would be nice to know if anyone has ever encountered a viewer for those file types.

-Darkstar

[fatduck]

I didn't look deep into the format but the basic format are CHUNK based like:

Code: Select all

dword   ResID       //"XAC ", "XSM " etc
dword   ResVersion  // 1.0.0.1 ??
struct YSOChunk {
   dword    ChunkID             
   dword    ofsDataSize         
   dword    ChunkVersion    
   <data>
}

XSM is animation file and XAC is mesh!

chunk id 0 is node chunk; contains coordinate and name(maybe more) data.
chunk id 1 is geometry chunk
chunk id 8 is contains another XAC files
chunk id 0xC8 is animation data chunk

[Rimbros]

Finally i found the client installer, but the format its .ysf, so far anyone can writhe please .BMS to unpack the data?. I cant found a unpacker in the net.