Autocad Tutorials

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AutoCAD is a CAD (Computer Aided Design or Computer Aided Drafting) software application for 2D and 3D design and drafting. It is developed and sold by Autodesk, Inc. First released in December 1982, AutoCAD was one of the first CAD programs to run on personal computers, notably the IBM PC. At that time, most other CAD programs ran on mainframe computers or mini-computers which were connected to a graphics computer terminal for each user.

Early releases of AutoCAD used primitive entities — lines, polylines, circles, arcs, and text — to construct more complex objects. Since the mid-1990s, AutoCAD has supported custom objects through its C++ Application Programming Interface (API). Modern AutoCAD includes a full set of basic solid modeling and 3D tools. With the release of AutoCAD 2007 came improved 3D modeling, which meant better navigation when working in 3D. Moreover, it became easier to edit 3D models. The mental ray engine was included in rendering, it was now possible to do quality renderings. AutoCAD 2010 introduced parametric functionality and mesh modeling.

AutoCAD supports a number of APIs for customization and automation. These include AutoLISP, Visual LISP, VBA, .NET and ObjectARX. ObjectARX is a C++ class library, which was also the base for products extending AutoCAD functionality to specific fields, to create products such as AutoCAD Architecture, AutoCAD Electrical, AutoCAD Civil 3D, or third-party AutoCAD-based applications.

AutoCAD and AutoCAD LT are available for English, German, French, Italian, Spanish, Japanese, Korean, Chinese Simplified, Chinese Traditional, Russian, Czech, Polish, Hungarian, Brazilian Portuguese, Danish, Dutch, Swedish, Finnish, Norwegian, and Vietnamese. The extent of localization varies from full translation of the product to documentation only. The AutoCAD command set is localized as a part of the software localization.

Spratly Islands

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free AutoCAD tutorials

The Spratly Islands are a group of more than 750 reefs, islets, atolls, cays and islands in the South China Sea. The archipelago lies off the coasts of the Philippines and Malaysia (Sabah), about one third of the way from there to southern Vietnam. They comprise less than four square kilometers of land area spread over more than 425,000 square kilometers of sea. The Spratlys are one of three archipelagos of the South China Sea which comprise more than 30,000 islands and reefs and which complicate governance and economics in that region of Southeast Asia. Such small and remote islands have little economic value in themselves, but are important in establishing international boundaries. There are no native islanders but there are rich fishing grounds and initial surveys indicate the islands may contain significant reserves of oil and natural gas.

About 45 islands are occupied by relatively small numbers of military forces from Vietnam, the People's Republic of China, the Republic of China (Taiwan), Malaysia and the Philippines. Brunei has also claimed an EEZ in the southeastern part of the Spratlys encompassing just one area of small islands above mean high water (on Louisa Reef.)