Reference model

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Reference.mdl

The Reference.mdl, conventionally named <modelname>.mdl, contains a range of key information for an in game model:

• The model's Origin, which is used to align its rendermesh (VTX), collisionmodel (PHY), gibs, etc to the Model Entity's position in the World.
• The names of any sound WAV files used by this model.
• The names of the VMT files to use as Skins. (or is this in VTX / VVD files ?)
• The name of the PHY file to use as a collisionmodel.
• The names of the MDL files used to store animations.
• etc

Reference.smd

The reference.smd, conventionally named "<modelname>_ref.smd" or "lod0_<modelname>_ref.smd", contains:

• The nodes block defines the skeletal Bone Hierarchy.
• The skeleton block defines the bone coordinates for a single "idle" animation frame.
• The triangles block defines each (triangular) polygon of the (default LOD) Render Mesh.
  • Each triangle specifies the default Skin filename, followed by a set of XYZUV coordinates for each of its vertices.
  • XYZ are the 3D Mesh coords, and UV are the 2D Texturemap coords.