What is the structure of a .obj file?

A .obj (Wavefront OBJ) file is a simple plain-text format used for storing 3D geometric models and their accompanying materials. The structure of a .obj file consists of various sections and statements. The file typically begins with metadata lines specifying the file format version, as well as comments for additional information. The vertex section follows, where each vertex is defined by its x, y, and z coordinates. Then comes the texture coordinate section, describing the UV mapping of vertices. The vertex normal section follows, representing the direction the surface is facing at each vertex. The object section defines the objects' names and groups, providing organization to the model. Finally, the face section describes the polygons of the model, connecting the vertices, texture coordinates, and normals to form the 3D shape. These sections, along with material statements, define the structure of a .obj file, enabling easy interchange of 3D models between various software applications.

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