OBJ
OBJ (Object File) is a simple, text-based 3D model file format that stores geometric data such as vertices, texture coordinates, normals, and face elements. It is widely used in computer graphics, 3D printing, and CAD applications due to its human-readable structure and compatibility with many software tools. The format supports polygonal geometry and can include material definitions through associated MTL files.
Developers should learn OBJ when working with 3D graphics, game development, or 3D printing, as it is a standard interchange format supported by most 3D modeling software like Blender, Maya, and 3ds Max. It is particularly useful for exporting and importing models between different applications, prototyping, and educational purposes due to its simplicity and widespread adoption.