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The properties of these graphical entities are revealed to AutoLISP as association lists in which values are paired with AutoCAD group codes that indicate properties such as definitional points, radii, colors, layers, linetypes, etc. AutoCAD loads AutoLISP code from .LSP files. [3] AutoLISP code can interact with the user through AutoCAD's ...
As of AutoCAD 2007 and later, AutoLISP or Visual-LISP programs can call routines written in Visual Studio .NET (VB or C#). Programmers can now create dialogs in VB or C# that have the full range of controls found in the .NET Forms API and can be called and accessed from Visual-LISP.
AutoCAD's native file formats are denoted either by a .dwg, .dwt, .dws, or .dxf filename extension. .dwg and, to a lesser extent, .dxf, have become de facto, if proprietary, standards for CAD data interoperability, particularly for 2D drawing exchange. [31] The primary file format for 2D and 3D drawing files created with AutoCAD is .dwg.
AutoLISP, a programming and scripting language for AutoCAD, is based on a very old version of XLISP. XLISP-PLUS is a derivative of XLISP 2.0 that continues to add Common Lisp features. Winterp is a derivative of XLISP-PLUS. XLISP-STAT is an implementation of Lisp-Stat, an environment for dynamic graphics and statistics with objects.
Contains the data that apply to nongraphical objects, used by AutoLISP, and ObjectARX applications. THUMBNAILIMAGE section Contains the preview image for the DXF file. END OF FILE. The data format of a DXF is called a "tagged data" format, which "means that each data element in the file is preceded by an integer number that is called a group code.
Lisp was originally implemented on the IBM 704 computer, in the late 1950s.. The popular explanation that CAR and CDR stand for "Contents of the Address Register" and "Contents of the Decrement Register" [1] does not quite match the IBM 704 architecture; the IBM 704 does not have a programmer-accessible address register and the three address modification registers are called "index registers ...
IntelliCAD versions that work with BIM files added choosing the IFC4 or IFC4x3 schema when exporting to .ifc files, and display properties for AEC styles. IntelliCAD versions that natively work with DGN files added attaching cell library (.cel) files, using the Explorer command to work with layouts and text styles, and snapping to geometric ...
The Common Lisp Object System (CLOS) is the facility for object-oriented programming in ANSI Common Lisp. CLOS is a powerful dynamic object system which differs radically from the OOP facilities found in more static languages such as C++ or Java .