OBJtiedosto

An OBJ file, also known as an object file, is a simple, text-based file format for representing three-dimensional objects. It is widely supported by 3D modeling, animation, and rendering software. The OBJ format stores geometric information, such as vertex coordinates, texture coordinates, and normal vectors, as well as material definitions.

The core of an OBJ file consists of a series of commands, each starting with a different letter. For example, 'v' defines a vertex, 'vt' defines a texture coordinate, 'vn' defines a normal vector, and 'f' defines a face, which is a polygon composed of vertices. Lines in an OBJ file are typically separated by newline characters.

OBJ files can also include references to material library files, usually with a '.mtl' extension. These material files describe the surface properties of the object, such as color, texture maps, and reflectivity. This allows for more detailed and realistic rendering.

While OBJ files are excellent for storing geometric data and are relatively easy to parse, they do not inherently support animation data or complex scene structures. For these purposes, other file formats might be more suitable. Despite these limitations, the OBJ format remains a popular choice for its simplicity and broad compatibility in the 3D graphics industry.