: Use ssget to pick multiple objects based on criteria (like layer or color), allowing you to modify hundreds of items at once.
: The (command ...) function allows a routine to execute standard AutoCAD commands just as a user would type them. AutoLISP in AutoCAD
: Use the setq function to assign a value to a variable, such as (setq myWidth 10.5) . Essential Functions for Automation : Use ssget to pick multiple objects based
: Functions like getpoint , getreal , and getstring pause the routine to ask the user for specific data. Essential Functions for Automation : Functions like getpoint
AutoLISP is a powerful, high-level programming language specifically designed to extend and automate the functionality of AutoCAD. Based on the LISP (LISt Processing) language, it was first introduced in 1986 and has since become the most popular tool for CAD users to create custom commands and streamline repetitive drafting tasks. As an interpreted language, you can run code directly from the AutoCAD command line without needing to compile it first. Core Concepts and Syntax
: Common types include integers, real numbers (decimals), strings (text), and lists. Lists are the heart of the language and can store anything from a simple set of coordinates to complex drawing data.
: In AutoLISP, the function name always comes first, followed by its arguments. For example, to add two numbers, you write (+ 1 2) instead of 1 + 2 .