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CAD file formats

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Source: Wikipedia. Pages: 30. Chapters: AutoCAD DXF, ACIS, .dwg, ISO 10303, STL, Wavefront .obj file, IGES, JT, MD3, CAD data exc... Weiterlesen
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Source: Wikipedia. Pages: 30. Chapters: AutoCAD DXF, ACIS, .dwg, ISO 10303, STL, Wavefront .obj file, IGES, JT, MD3, CAD data exchange, COLLADA, List of STEP parts, Design Web Format, CAD standards, .3ds, PLY, MD2, .MDX, Open Design Alliance, ISO 13399, OpenCTM, Parasolid, Geometric Description Language, PRC, Product Data Record, 3CT, DGN, VDA 6.1, BE-Bridge, ArchiCAD library part, Intergraph Standard File Formats, VDA-FS. Excerpt: DWG ("drawing") is a binary file format used for storing two and three dimensional design data and metadata. It is the native format for several CAD packages including AutoCAD, IntelliCAD (and its variants) and Caddie. In addition, DWG is supported non-natively by many other CAD applications. The .bak (drawing backup), .dws (drawing standards), .dwt (drawing template) and .sv$ (temporary automatic save) files are also DWG files. DWG (denoted by the .dwg filename extension) was the native file format for the Interact CAD package, developed by Mike Riddle in the late 1970s, and subsequently licensed by Autodesk in 1982 as the basis for AutoCAD. From 1982 to 2009, Autodesk created versions of AutoCAD which wrote no fewer than 18 major variants of the DWG file format, none of which are publicly documented. The DWG format is probably the most widely used format for CAD drawings. Autodesk estimates that in 1998 there were in excess of two billion DWG files in existence. There are several claims to control of the DWG format. It is Autodesk who designs, defines, and iterates the DWG format as the native format for their CAD applications. Autodesk sells a read/write library, called RealDWG, under selective licensing terms for use in non-competitive applications. Several companies have attempted to reverse engineer Autodesk's DWG format, and offer software libraries to read and write Autodesk DWG files. The most successful is Open Design Alliance, a non-profit consortium created in 1998 by a number of software developers (including competitors to Autodesk), released a read/write/view library called the OpenDWG Toolkit, which was based on the MarComp AUTODIRECT libraries. (ODA has since rewritten and updated that code.) In 1998, Autodesk added file verification to AutoCAD R14.01, through a function called DWGCHECK. This function was supported by an encrypted checksum and product code (called a "watermark" by Autodesk), written into DWG files created by the program. In 2006, in

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Titel: CAD file formats
Editor:
EAN: 9781155428956
ISBN: 1155428951
Format: Kartonierter Einband
Anzahl Seiten: 68
Gewicht: 304g
Größe: H246mm x B189mm x T4mm
Jahr: 2012

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