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VRML (Virtual Reality Modeling Language) is a text-based 3D graphics language for describing virtual reality scenes and objects. It was originally released in 1994 to enable Internet users to browse and interactively navigate 3D models and create VR scenes. VRML files usually end with .wrl Enterprise Archive File and contain information about geometry, materials, animation, and interactivity with individual elements in the scene. These elements can be basic geometry such as spheres, cuboids, or cylinders, complex surface models or 3D mesh models with texture mapping. VRML files, when run in a browser, allow users to interact with the mouse and keyboard to browse, zoom, rotate, and pan 3D scenes. In addition, VRML also supports scripting, allowing developers to achieve higher levels of interactivity. Although VRML received a lot of attention in the late 1990s and early 2000s, it has been replaced by most emerging 3D graphics technologies in web applications due to its more restricted use and backward technology. However, VRML is still considered an important historical milestone in the field of virtual reality.
DXF (Drawing Exchange Format) is an electronic drawing file format originally developed by AutoCAD and widely used. It is used to exchange and share 2D and 3D graphic data between different CAD (Computer Aided Design) software.
DXF files are in plain text format, which is readable and editable. It can store various types of graphic entities, such as points, lines, circles, polylines, polygons, arcs, text, and so on. In addition, DXF also supports storing metadata information such as layers, colors, linetypes, fonts, sizes, block definitions, and block references.
Due to DXF being an open file format, many CAD software supports importing and exporting DXF files. This enables the exchange of drawing data between different CAD software, facilitating collaboration and collaborative work between designers and engineers.
In DXF files, graphic data is saved in ASCII format and can be viewed and modified using a text editor. The structure of DXF files is clear and easy to parse and process. It is widely used in fields such as mechanical design, architectural design, and circuit design, becoming a universal data exchange standard between CAD software.