How to convert files from AutoCAD
to OBJ?

AutoCAD is a software application for CAD and drafting built on Autodesk’s proprietary kernel named Shapemanager. Developed by Autodesk, AutoCAD was first to run on microcomputers with internal graphics controllers. As it is available on thirteen different languages, AutoCAD is widely used by architects, project managers engineers, graphic designers, city planners and other professionals all over the globe.

AutoCAD enables professionals to draft and edit 2D geometry and 3D models with solids, surfaces and meshes, annotate drawings with text, leaders, dimensions and tables, customize wit add-on apps and API.

There are different versions of AutoCAD. AutoCAD LT is the lower cost version, with limited capabilities. AutoCAD 360 is an account-based mobile and web application. Its users can view, edit and share files via mobile device and web. To add to it, students can use free student versions of AutoCAD, which are almost identical to the full commercial one.

OBJ is a geometry definition file format (.obj extension) first developed by Wavefront Technologies for its Advanced Visualizer animation package.

The OBJ file format is a simple data-format that represents 3D geometry alone — namely, the position of each vertex, the UV position of each texture coordinate vertex, vertex normals, and the faces that make each polygon defined as a list of vertices, and texture vertices.

Vertices are stored in a counter-clockwise order by default, making explicit declaration of face normals unnecessary. OBJ coordinates have no units, but OBJ files can contain scale information in a human readable comment line.