AutoLISP Routines

WALLSECT constructs an exterior wall section — the vertical slice through a wall that goes on nearly every set of architectural drawings. It is somebody's first program. The header says so, in the author's own words: "Not bad for my first shot at LISP programs!!!" She was Brigitte Robertson, a student at Billings Vocational Technical Center in Montana, and she wrote it … [Read more...] about WALLSECT LISP: A 1994 Student Wall Section Routine

WALLS is a nine-command wall drafting package for AutoCAD floor plans, credited to Alacrity and now at its third revision, version 1.3. It gives you four different ways to draw parallel-line walls, a cleanup routine for the junctions, and commands for openings, doors and windows. The documentation is a proper reference manual with worked examples, which for a package of this … [Read more...] about WALLS LISP for AutoCAD: Nine Wall Drafting Commands

Three small editing commands in one file, each changing one property of one object you pick. Between them they cover the three edits that come up most often when tidying somebody else's drawing: the content of a piece of text, how wide that text is squeezed, and the colour of an object. They are by Ade Suharna, dated 1 September 2004, and carry his own program numbering along … [Read more...] about MET, WF and EOC: Three Small AutoCAD Edit Commands

VPTEXT is a small free AutoLISP routine that scales selected single-line text by a viewport scale factor you type in. It comes from an era when annotative text did not exist and drafters routinely drew text in model space at its intended paper height, then had to multiply every height up to suit the viewport scale before plotting. VPTEXT does that multiplication in one pass … [Read more...] about VPTEXT LISP Routine: Scale Text to Viewport Scale in AutoCAD

VPGRID draws a survey coordinate grid over a viewport. You select a viewport in a layout, give it a grid interval in metres, and it lays a border around the viewport, tick marks where each grid line meets that border, easting and northing labels against every tick, and small crosses at each grid intersection inside. It is a more considered piece of work than its one-line … [Read more...] about VPGRID LISP: Survey Coordinate Grid Over an AutoCAD Viewport

Three lines of AutoLISP that solve one specific, maddening problem. UXS unloads every xref in the current drawing, saves the file, then reloads them all again. That sequence — unload, save, reload — is the workaround for a Revit link behaving badly, and doing it by hand through the External References palette a dozen times a day gets old fast. The problem it was … [Read more...] about UXS LISP: Unload Xrefs, Save and Reload in One Command