An AutoLISP is a programming language that allows users to create custom commands and functions in AutoCAD, a widely used computer-aided design (CAD) software. With AutoLISP, users can automate repetitive tasks, extend the capabilities of AutoCAD, and enhance their productivity.
What can you do with AutoLISP?
AutoLISP provides users with the ability to create custom commands and functions within AutoCAD. These commands can be used to automate a wide range of tasks, such as drawing objects, modifying existing drawings, and performing calculations.
Some common use cases for AutoLISP include:
- Automating repetitive tasks: With AutoLISP, you can write scripts that automate repetitive tasks, such as creating multiple objects or applying the same modifications to several entities.
- Extending AutoCAD’s functionality: AutoLISP allows you to add new features and capabilities to AutoCAD. You can create custom commands that perform specific actions or create functions that perform complex calculations.
- Enhancing productivity: By automating tasks and adding new features, AutoLISP can significantly improve your productivity in using AutoCAD. It allows you to work more efficiently by reducing manual labor and streamlining workflows.
How does AutoLISP work?
To use AutoLISP in AutoCAD, you need to write LISP code using a text editor of your choice. The code consists of expressions and functions that define the desired behavior of your custom command or function.
An expression in LISP consists of one or more atoms separated by whitespace or parentheses. Atoms can be symbols (such as variable names), numbers, strings (enclosed in double quotes), or other LISP expressions.
Here’s an example of a simple AutoLISP code:
(defun c:mycommand () (command "circle" (getpoint) 5) )
In this example, the defun function is used to define a new command called mycommand. When the command is executed, it calls the command function to create a circle at a specified point with a radius of 5 units.
How to use AutoLISP in AutoCAD?
To use an AutoLISP program in AutoCAD, you need to load the program into the current drawing or make it available through AutoCAD’s startup suite. Here’s how you can load an AutoLISP program:
- Method 1: Type CUILOAD in the command line and press Enter. In the Customize User Interface dialog box, select “Partial Customization Files” and click on “Load”. Browse for your AutoLISP file and click on “Open”. Finally, click on “Close” to close the dialog box.
- Method 2: Type APPLOAD in the command line and press Enter. In the Load/Unload Applications dialog box, click on “Contents”. Browse for your AutoLISP file, select it, and click on “Load”.
Finally, click on “Close” to close the dialog box.
- Method 3: If you want to load your AutoLISP program every time you start AutoCAD, you can add it to the startup suite. Type CUI in the command line and press Enter. In the Customize User Interface dialog box, select “Partial Customization Files” and click on “Add”. Browse for your AutoLISP file, select it, and click on “Open”. Finally, click on “Apply” and then “OK” to close the dialog box.
Once the AutoLISP program is loaded, you can execute your custom commands by typing their names in the command line or assigning them to toolbar buttons, menus, or keyboard shortcuts.
Conclusion
AutoLISP is a powerful programming language that allows users to create custom commands and functions in AutoCAD. By leveraging its capabilities, users can automate repetitive tasks, extend AutoCAD’s functionality, and enhance their productivity. Whether you’re a CAD professional or a hobbyist, learning AutoLISP can greatly improve your efficiency in using AutoCAD.