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AC format files are file formats used for 3D model data storage, mainly used by AC3D software.
AC files use plain text format to store data of 3D models. The file content includes information such as vertices, surfaces, and materials.
Each .ac file can contain multiple objects, each with its own vertex and face definitions. With this structured text format, .ac files can effectively describe complex 3D models.
The STL file format is a file format used to describe three-dimensional objects. It consists of a series of triangular faces, each face composed of three vertices and a normal vector. It is commonly used in 3D printing and computer-aided design (CAD) software, where three-dimensional models can be exported as STL files for further processing and manufacturing. The STL file format is simple and easy to use, making it widely used in various fields.