The above example could also be written using built-in AutoCAD commands to achieve the same result, however this approach is susceptible to changes to the command prompts between AutoCAD releases.Change autocad ribbon to classic AutoCAD 2009 Ribbon Interface. The function requires no parameters, and contains one local variable ('pnt'). The function would then place a marker at that point, and create a one-line text object next to it, containing the X and Y coordinates of the point expressed relative to the active User Coordinate System (UCS). The user, upon typing 'pointlabel' at the AutoCAD command line, would be prompted to pick a point, either by typing the X and Y coordinates, or clicking a location in the drawing. The name of the function includes a special prefix 'c:', which causes AutoCAD to recognize the function as a regular command.
#Free autocad lisp code
The above code defines a new function which generates an AutoCAD point object at a given point, with a one-line text object displaying the X and Y coordinates beside it. "TEXT" ) ( cons 10 ( trans ( cons ( + ( car pnt ) 0.6 ) ( cdr pnt )) 1 0 )) ( cons 40 ( getvar 'textsize )) ( cons 1 ( strcat "X:" ( rtos ( car pnt )) " Y:" ( rtos ( cadr pnt )))) ) ) ) ) ( princ ) ) "POINT" ) ( cons 10 ( trans pnt 1 0 )) ) ) ( entmake ( list ' ( 0.
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( defun c:pointlabel ( / pnt ) ( if ( setq pnt ( getpoint "\nSpecify point: " )) ( progn ( entmake ( list ' ( 0. Timeline of Lisp dialects ( edit) 1955Ī simple Hello world program in AutoLISP would be: There are thousands of utilities and applications that have been developed using AutoLISP or Visual LISP (distributed as LSP, FAS and VLX files). Most development involving AutoLISP since AutoCAD 2000 is performed within Visual LISP since the original AutoLISP engine was replaced with the Visual LISP engine. Bricscad, IntelliCAD, DraftSight and others have AutoLISP functionality, so that AutoLISP users can consider using them as an alternative to AutoCAD. ĪutoLISP has such a strong following that other computer-aided design (CAD) application vendors add it to their products. This is part of a long-term process of changing from VBA to. As of January 31, 2014, Autodesk no longer supports VBA versions older than 7.1. Since then, Autodesk has ceased major enhancements to Visual LISP and focused more effort on VBA and. It was incorporated into AutoCAD 2000 released in March 1999, as a replacement for AutoLISP. Autodesk purchased this, renamed it Visual LISP, and briefly sold it as an add-on to AutoCAD release 14 released in May 1997. Vital LISP was a superset of the existing AutoLISP language that added VBA-like access to the AutoCAD object model, reactors (event handling for AutoCAD objects), general ActiveX support, and some other general Lisp functions. Vital-LISP, a considerably enhanced version of AutoLISP including an integrated development environment (IDE), debugger, compiler, and ActiveX support, was developed and sold by third party developer Basis Software. However, it has remained AutoCAD's main user customizing language. After that, its development was neglected by Autodesk in favor of more fashionable development environments like Visual Basic for Applications (VBA). The language was introduced in AutoCAD Version 2.18 in January 1986, and continued to be enhanced in successive releases up to release 13 in February 1995. History ĪutoLISP was derived from an early version of XLISP, which was created by David Betz. AutoLisp also has a built-in graphical user interface (GUI) mini- or domain-specific language (DSL), the Dialog Control Language, for creating modal dialog boxes with automated layout, within AutoCAD.
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ĪutoLISP code can interact with the user through AutoCAD's graphical editor by use of primitive functions that allow the user to pick points, choose objects on screen, and input numbers and other data. 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.
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Aside from the core language, most of the primitive functions are for geometry, accessing AutoCAD's internal DWG database, or manipulation of graphical entities in AutoCAD. AutoLISP is a small, dynamically scoped, dynamically typed Lisp language dialect with garbage collection, immutable list structure, and settable symbols, lacking in such regular Lisp features as macro system, records definition facilities, arrays, functions with variable number of arguments or let bindings.