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XBM 360 model file
Posted: Thu Dec 11, 2014 12:52 am
by JohnHudeski
I usually don't do this but I am having a very slow brain day.
Please can anyone guide my mind into figuring out the rest of this structure
Thanks
Code: Select all
//Big Endian
struct KengoXBM
{
struct Header
{
uint ID;
uint unkn0;
uint otherCount; //mesh? group?
uint shapeCount;
//------------Line 2---------------
uint unk1;
uint unk2; //"Points" to address of first item. always 80
uint addrs[12];
uint addr;//Seems like a special section
uint unkn3; //not 1
}header;
struct Other
{
char name[32];
char data[160];
}other[header.otherCount];
struct Shape
{
char name[32];
float matrix1[16];
float chnk0[32]; //Vertices?
char data[320];
}shape[header.shapeCount];
//Unknown chunks
char un02[header.addrs[3]-header.addrs[2]];
char un03[header.addrs[4]-header.addrs[3]];
char un04[header.addrs[5]-header.addrs[4]];
char un05[header.addrs[6]-header.addrs[5]];
char un06[header.addrs[7]-header.addrs[6]];
char un07[header.addrs[8]-header.addrs[7]];
char un08[header.addrs[9]-header.addrs[8]];
char un09[header.addrs[10]-header.addrs[9]];
char un10[header.addrs[11]];
char un11[header.addr-(header.addrs[11]+header.addrs[10])];
//char un12[addrs[3]-addrs[2]];
struct Unkn_str
{
uint one; //usually
uint size;
uint pad[6]; //usually zero
}unknStr;
char un12[unknStr.size];
char remnants[32];
}xbm;
Re: XBM 360 model file
Posted: Thu Dec 11, 2014 3:50 am
by JohnHudeski
I have updated the structure
Thanks to all who downloaded
Re: XBM 360 model file
Posted: Thu Dec 11, 2014 7:42 am
by JohnHudeski
Code: Select all
//Big endian
struct KengoXBM
{
struct Header
{
uint ID;
uint unkn0;
uint otherCount; //mesh? group?
uint shapeCount;
//------------Line 2---------------
uint unk1;
uint unk2; //"Points" to address of first item. always 80
uint addrs[12];
uint addr;//Seems like a special section
uint unkn3; //not 1
}header;
struct Other
{
char name[32];
int unkn[8];
char data[128];
}other[header.otherCount];
struct Shape
{
char name[32];
float matrix1[16];
float chnk0[32]; //Vertices?
float chnk1[4];
int chunk2[12];
struct ShapeChunk
{
int i0;
int i1;
int i2;
int i3;
int i4;
int i5; //Constant -65536
int i6;
int i7; //268435554, 268435746, 268435458
}sChnk[3];
int addr[7];
int chunk3[33];
}shape[header.shapeCount];
//Unknown chunks
char un02[header.addrs[3]-header.addrs[2]]; //This is a structure of some sort
char un03[header.addrs[4]-header.addrs[3]]; //shape related
//shape related
// 0 - might be an id/int or 2 shorts
float un04[(header.addrs[5]-header.addrs[4])/4];
float un05[(header.addrs[6]-header.addrs[5])/4];
float un06[(header.addrs[7]-header.addrs[6])/4]; //shape related
float un07[(header.addrs[8]-header.addrs[7])/4]; //shape related
float un08[(header.addrs[9]-header.addrs[8])/4]; //shape related
float un09[(header.addrs[10]-header.addrs[9])/4]; //shape related
char un10[header.addrs[11]];
char un11[header.addr-(header.addrs[11]+header.addrs[10])];
//char un12[addrs[3]-addrs[2]];
struct Unkn_str //un12's header
{
uint one; //usually
uint size;
uint pad[6]; //usually zero
}unknStr;
char un12[unknStr.size];
//char remnants[32];
}xbm;
Re: XBM 360 model file
Posted: Thu Dec 11, 2014 1:32 pm
by shakotay2
why do u think .XBM is a model file?
For me it looks like a material file ("Xbox 360 Shader Compiler")
(while matWVPVS could be the abbreviation for "matrix World view projection" for example)
VS= VertexShader
I would search for such structures:
struct VS_OUTPUT
{
float4 Pos : POSITION;
float2 Tex : TEXCOORD0;
float3 Light : TEXCOORD1;
float3 View : TEXCOORD2;
};
Re: XBM 360 model file
Posted: Thu Dec 11, 2014 5:54 pm
by JohnHudeski
I believe it is a large container file with model and shader
Also in the game there are only 6 file type
And I have figure out every other one
Shaders are in a different file
Code: Select all
struct Shape
{
char name[32];
float matrix1[16];
float chnk0[32]; //Bounding box??
float chnk1[4];
int chunk2[12];
struct ShapeChunk
{
int i0;
int i1;
int i2;
int i3;
int i4;
int i5; //Constant -65536
int i6;
int i7; //268435554, 268435746, 268435458
}sChnk[3];
//0 = -1s (random stuff)
//1 = vertices floats
//2 = Draw order? faces? shorts?
//3 = addr in un02 header->(count,size,0,count)?
//------------below are weird ints at the bottom of un03
//4 =
//5 =
//6 =
int addr[7];
int chunk3[33];
}shape[header.shapeCount];
Re: XBM 360 model file
Posted: Fri Dec 12, 2014 7:58 am
by JohnHudeski
Progress!?!?!
So my guess was right to an extent
As you can see from the image I was able to read the bounding box and the object itself
Re: XBM 360 model file
Posted: Fri Dec 12, 2014 8:01 am
by JohnHudeski
The biggest problem was making sense of the triangles
There are many duplicate vertices (uses 24 vertices where 8 would suffice)
I haven't manually rendered an object since 2009 so this is insane to me
basically there is an chunk with vertex indices (shorts) that read in 4s (quads)
0,1,2,3,-1
4,5,6,7,-1
.......,
n-3,n-2,n-1, -1
Where n is the number of vertices
This would be a nightmare for non primitive objects
I did the rendering in unity3d and I had to modify things manually cos i could not make sense of this (triangle strip?)
Anyone willing to educate me?
Sorry! I'm an idiot Just remember Line and triangle strips
Re: XBM 360 model file
Posted: Fri Dec 12, 2014 9:10 am
by JohnHudeski
So this is what is looks like
I the object was called Magic Box and existed in a folder called effects
I can only imagine this is the reason for so many verts that cross each other inside the mesh
I have also figure out how to automate the data reading
All I need now is u,v and normals
Re: XBM 360 model file
Posted: Mon Dec 15, 2014 1:59 pm
by JohnHudeski
Why would a vertex weight come in x,y,z format and not just 1 floating point value per bone?
Re: XBM 360 model file
Posted: Wed Dec 17, 2014 3:16 am
by JohnHudeski
Got everything but UVs
Re: XBM 360 model file
Posted: Thu Dec 18, 2014 2:42 pm
by JohnHudeski
So I think I found the UV coordinates
Basically the only file section i havent touched so far.
And to my surprise it is something unreal
I think the uv's are stored as halves or shorts or am I Nuts?
Or maybe they aren't even uvs
Only files with textures have this section with data other than 0xFFFF
Code: Select all
struct SampleUV
{
int pad0;
hfloat a;
hfloat b;
} ud[number of verts];
Re: XBM 360 model file
Posted: Sat Jan 03, 2015 2:47 am
by JohnHudeski
I can't believe I am still stuck trying to figure out the UV for this game
I have Identified the data chunk but I still cannot understand how it is represented. It is really depressing