OBJ Format

An OBJ file is a plain text file, containing vertices, polygon faces, and other information. Each vertex, face, etc, is given on a separate line.

Each line begins with a token to identify what sort of line it is - 'v' for vertex, 'f' for face, etc.

v x y z

vertex position

vn x y z

vertex normal

vt u v

texture coordinate

f v1 v2 v3 ...

face (list of vertex numbers)

mtllib file.mtl

file containing material descriptions

usemtl name

current material to apply to geometry