3DN is a slightly simplified version of the 3DF and CAR file formats from the Action Forms-developed Carnivores games, used in Carnivores: Dinosaur Hunter. Specifically, the 3DN files swap the order of faces and vertices, so that vertices are stored first, and the files store only the model; the texture, animations, and sounds are stored elsewhere. These files are located in \models.
Format
// header
- long - Number of vertices
- long - Number of faces
- long - Number of bones
byte(32) - Image name
// for each vertex (16 bytes)
- float - X coordinate
- float - Y coordinate
- float - Z coordinate
- short - owner, bone to which vertex is attached
- short - unknown
// for each face (64 bytes)
- long - vertex 1
- long - vertex 2
- long - vertex 3
- short(6) - texture vertex coordinates
- long - unknown (always null?) (possibly the place for flags and DMask in CAR/3DF files)
- long - unknown (Distant?)
- long - Next?
- long - unknown (group? usually null but sometimes has low values)
- byte(12) - unknown, but probably reserved (always null)
// for each bone (48 bytes)
- byte(32) - Name
- float - X coordinate
- float - Y coordinate
- float - Z coordinate
- short - index to the "parent" bone, -1 if there is no parent
- short - boolean visibility of bone (normally false)
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