Call of Duty: XMODEL formats

Intermediate (*.XMODEL_EXPORT)

Version 5 (vCoD)

Header

// Source filename: 'C:\trees\model_source\character_models\character_lod\airborne_Low.max'
// Export time: Fri Aug 01 15:44:31 2003
MODEL
VERSION 5

• // Comments (optional)
• MODEL data type definition (magic word)
• VERSION number

Bone hierarchy table

Visual bone hierarchy tree (section)

NUMBONES 73
BONE 0 -1 "TAG_ORIGIN"
BONE 1 0 "Bip01 Pelvis"
BONE 2 1 "Bip01 L Thigh"
BONE 3 1 "Bip01 R Thigh"
...

• NUMBONES number of bones (note: bone numeration starts with zero, BONE 0 + BONE 1 + BONE 2 = NUMBONES 3)
• BONE description:
  • Bone number
  • Bone parent number (-1 = root origin, a model can only have one!)
  • Bone "name string" (has to be unique per model)

Bone orientations

Local bone axis, corresponding to vectors of the bone's rotation matrix

BONE 0
OFFSET 0.000002 -2.222280 0.000042
SCALE 1.000000 1.000000 1.000000
X 0.000000 -1.000000 -0.000001
Y 1.000000 0.000000 0.000000
Z -0.000000 -0.000001 1.000000

BONE 1
OFFSET 4.866636 1.218493 37.227966
SCALE 1.000000 1.000000 1.000000
X -0.008941 0.033732 -0.999391
Y -0.004868 -0.999420 -0.033689
Z -0.999948 0.004564 0.009100
...

• BONE number (as declared in the hierarchy table)
• OFFSET translations / position in the 3d space, like a coordinate (3x float)
• SCALE bone scale, appears to be always 1.000000 (3x float)

• X part of rotation matrix, basically the local x-axis of the bone (3x float)
• Y part of rotation matrix, basically the local y-axis of the bone = bone direction (3x float)
• Z part of rotation matrix, basically the local z-axis of the bone (3x float)

Vertices

NUMVERTS 93
VERT 0
OFFSET 0.091243 -5.213182 29.123474
BONES 3
BONE 3 0.333333
BONE 4 0.333333
BONE 2 0.333333

VERT 1
OFFSET 7.581652 -4.076623 29.466268
BONES 2
BONE 2 0.500000
BONE 4 0.500000

• NUMVERTS number of vertices in model
• Vertex description:
  • VERT number
  • OFFSET coordinate (3x float)
  • BONES number of bones influencing this vertex
  • BONE bone number as declared in the hierarchy table, normalized influence (float, between 0.000001 and 1.000000, all listed influences sum up to ~1.0)
    The influences are controlled via weight painting in the 3d modelling application.

Faces

NUMFACES 172
TRI 0 0 0 1
VERT 10 0.873177 0.502103 0.514332 0.849479 0.117676
VERT 3 0.875169 0.254302 0.964290 0.262399 -0.035947
VERT 65 0.910332 0.493356 0.583699 0.238673 -0.776100
TRI 0 0 0 1
VERT 6 0.399969 0.721943 0.699542 -0.713791 -0.033821
VERT 3 0.470804 0.723883 0.964290 0.262399 -0.035947
VERT 2 0.503285 0.902194 0.830325 0.552277 0.074499
TRI 0 0 0 1
VERT 2 0.503285 0.902194 0.830325 0.552277 0.074499
VERT 1 0.435323 0.925295 0.690132 -0.722368 -0.043609
VERT 6 0.399969 0.721943 0.699542 -0.713791 -0.033821

• NUMFACES number of faces in model (face = triangle, quads are not supported!)
• Face description:
  • TRI triangle belonging to object n, unknown number, material number, 1
  • VERT vertex number, UV texture coords (2x float), face normal (3x float)

Objects

This data block seems to have no effect on an xmodel file.

NUMOBJECTS 3
OBJECT 0 "LowModel"
OBJECT 1 "lowhand"
OBJECT 2 "lowhand01"

• NUMOBJECTS number of objects in xmodel_export file
• Object description:
  • OBJECT number, "name string"

Materials

NUMMATERIALS 7
MATERIAL 0 "body@air_chest.tga"
MATERIAL 1 "body@air_upperarm.tga"
MATERIAL 2 "body@air_forearm.tga"
MATERIAL 3 "body@air_upperleg.tga"
MATERIAL 4 "body@air_lowerleg.tga"
MATERIAL 5 "[email protected]"
MATERIAL 6 "body@air_boots.tga"

• NUMMATERIALS number of materials
• Material description:
  • MATERIAL number, "texture file name"

Converted

Version ?

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