Open someone else’s drawing, look at the block list, and there they are: *U27, *U28, *X4, dozens of them. You did not make them, you cannot edit them, and PURGE will not shift them. They are anonymous blocks, and they are usually not a problem. Here is what they are, where they come from in a modern drawing, and what you can actually do about the ones that … [Read more...] about Anonymous Blocks in AutoCAD – What They Are & How to Fix
AutoLISP Routines
AutoLISP for AutoCAD: Tutorials and 139 Free Routines
This page is the map. AutoLISP material has been published here since 1999 and the site has been online since 2003, which means the archive grew a good deal faster than any structure to hold it. What follows is that structure: a ten-lesson course for anyone who has never written a line of LISP, guidance on writing routines you will still understand in a year, and 139 free … [Read more...] about AutoLISP for AutoCAD: Tutorials and 139 Free Routines
CAD Tools: Autodesk’s R14 Bonus Tools, and What Still Runs
This download is a piece of AutoCAD history, and knowing what it actually is changes how you should approach it. The archive is Autodesk's own Bonus Tools from the Release 14 era — the collection that became Express Tools in later releases and, in many cases, ended up built into AutoCAD itself. The included text file is Autodesk's: "Thank you for Installing the Bonus … [Read more...] about CAD Tools: Autodesk’s R14 Bonus Tools, and What Still Runs
ADD LISP: A Running-Total Calculator for AutoCAD
ADD is a calculator that runs at the AutoCAD command line. You add numbers up, one after another, and it keeps the running total in front of you — without alt-tabbing to another program and losing your place in the drawing. It is by Craig Carr of Superior Designs, written in 1996, and the header records that it was a bonus winner in the November 1996 issue of Cadalyst. … [Read more...] about ADD LISP: A Running-Total Calculator for AutoCAD
Freehand LISP Routine: Hand-Drawn Line Effect for AutoCAD
Freehand is a free AutoLISP routine that makes AutoCAD linework look as though it was sketched by hand. It is aimed squarely at architectural presentation drawings: instead of the crisp, machine-perfect lines AutoCAD normally produces, you get lines with a slight wobble and corners where the strokes overshoot each other, the way they do in a pen sketch. The routine was written … [Read more...] about Freehand LISP Routine: Hand-Drawn Line Effect for AutoCAD
3D LISP Collection: 13 Files from the CompuServe CAD Forums
Thirteen files of 3D AutoLISP, collected from the CompuServe CAD forums in the late 1980s and early 1990s. It is the most historically interesting download in this library, because you can see where the pieces came from: some files are forum messages with the sender's ID still in the header, and at least one was written by Autodesk staff. The spring generator carries the … [Read more...] about 3D LISP Collection: 13 Files from the CompuServe CAD Forums