AutoCAD was derived from a program called Interact, which was written in a proprietary language (SPL) and ran on the Marinchip Systems 9900 computer (Marin-chip Systems was owned by the Autodesk co-founders John Walker and Dan Drake).
When Marin-chip Software Partners (later known as Autodesk) formed, the co-founders decided to re-code Interact in C and PL/1. They chose C because it seemed to be the biggest upcoming language.[citation needed] In the end, the PL/1 version was unsuccessful. The C version was, at the time, one of the most complex programs in that language. Autodesk had to work with the compiler developer Lattice to update C to get AutoCAD to run. Early releases of AutoCAD used primitive entities — lines, polylines, circles, arcs, and text — to construct more complex objects. Since the mid-1990s, AutoCAD supported custom objects through its C++ Application Programming Interface (API).
The modern AutoCAD includes a full set of basic solid modeling and 3D tools. The release of AutoCAD 2007 included the improved 3D modeling that provided better navigation when working in 3D. Moreover, it became easier to edit 3D models. The mental ray engine was included in rendering and therefore it is possible to do quality renderings. AutoCAD 2010 introduced parametric functionality and mesh modeling.
The latest AutoCAD releases are AutoCAD 2012 and AutoCAD 2012 for Mac. The release marked the 26th major release for the AutoCAD for Windows, and the second consecutive year for AutoCAD for Mac.
Autocad 2012
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Source : www.wikipedia.org
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