A collection of AutoLISP routines for AutoCAD. Here we have a vast collection of AutoCAD programs going all they way back to the early days of CAD software. Apr 28, 2015 AutoLISP is an interpretive language, so it can be stored in an ASCII text file, loaded, and then executed directly within AutoCAD. AutoLISP files typically have an.lsp file extension, but they can also have the.mnl file extension. Both LSP and MNL files can be edited with a text editor, such as Notepad on Windows and TextEdit on Mac OS.
Contents. Features AutoLISP is a small, dynamically, dynamically typed Lisp language dialect with, immutable list structure, and settable symbols, lacking in such regular Lisp features as system, records definition facilities, arrays, functions with variable number of arguments or let bindings. Aside from the core language, most of the primitive functions are for geometry, accessing AutoCAD's internal database, or manipulation of graphical entities in AutoCAD. The properties of these graphical entities are revealed to AutoLISP as 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. AutoLISP 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. AutoLisp also has a built-in (GUI) mini- or (DSL), the, for creating modal dialog boxes with automated layout, within AutoCAD. History AutoLISP was derived from an early version of XLISP, which was created by David Betz. 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. After that, its development was neglected by in favor of more fashionable development environments like (VBA),. However, it has remained AutoCAD's main user customizing language.
Vital-LISP, a considerably enhanced version of AutoLISP including an (IDE), and support, was developed and sold by third party developer Basis Software. 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. Autodesk purchased this, renamed it Visual LISP, and briefly sold it as an add-on to AutoCAD release 14 released in May 1997.
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It was incorporated into AutoCAD 2000 released in March 1999, as a replacement for AutoLISP. Since then, has ceased major enhancements to Visual LISP and focused more effort on VBA and.NET,.
As of January 31, 2014, Autodesk no longer supports VBA versions older than 7.1. This is part of a long-term process of changing from VBA to.NET for user customizing. AutoLISP has such a strong following that other (CAD) application vendors add it to their products., and others have AutoLISP functionality, so that AutoLISP users can consider using them as an alternative to AutoCAD. Most development involving AutoLISP since AutoCAD 2000 is performed within Visual LISP since the original AutoLISP engine was replaced with the Visual LISP engine. There are thousands of utilities and applications that have been developed using AutoLISP or Visual LISP (distributed as LSP, FAS and VLX files). Timeline of Lisp dialects 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2019 1.5 Examples A simple in AutoLISP would be. 1 ( defun hello ( ) 2 ( princ ' nHello World!'
) 3 ( princ ) 4 ) Note the final line inside the function definition: when evaluated with no arguments, the princ function returns a null symbol, which is not displayed by the AutoCAD. As the AutoCAD command line functions as a (REPL), this would normally print 'Hello World!' To the command line, followed immediately by the return value of the call to princ. Therefore, without the final call to the princ function, the result of this would be: Hello World!' NHello World!' The prin1 function may also be used to achieve the same result.
A more complex example might be. 1 ( defun c:pointlabel ( / pnt ) 2 ( if ( setq pnt ( getpoint ' nSpecify point: ' )) 3 ( progn 4 ( entmake 5 ( list 6 ' ( 0.
'POINT' ) 7 ( cons 10 ( trans pnt 1 0 )) 8 ) 9 ) 10 ( entmake 11 ( list 12 ' ( 0. 'TEXT' ) 13 ( cons 10 ( trans ( cons ( + ( car pnt ) 0.6 ) ( cdr pnt )) 1 0 )) 14 ( cons 40 ( getvar 'textsize )) 15 ( cons 1 ( strcat 'X:' ( rtos ( car pnt )) ' Y:' ( rtos ( cadr pnt )))) 16 ) 17 ) 18 ) 19 ) 20 ( princ ) 21 ) The above code defines a new which generates an AutoCAD point object at a given point, with a one-line text object displaying the X and Y coordinates beside it. The name of the function includes a special prefix 'c:', which causes AutoCAD to recognize the function as a regular command. 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 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 function requires no, and contains one ('pnt'). 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. References.