AutoLISP Routines

CAM draws the working face of a plate cam — the shape that has to be cut so a roller follower rises by a given amount over a given angle, in a given way. What CamProfile does Three motion laws. Constant velocity rises at a steady rate: simple, and violent, because the acceleration is infinite at each end, so it hammers — use only at low speed. Harmonic … [Read more...] about CAM LISP: Draw a Plate Cam Profile From a Motion Law

CABINETFACE draws the front elevation of a cabinet — carcase outline, base trim, and a full run of drawer or door panels — from a handful of dimensions. This is the drawing nobody wants to do by hand: a six-drawer bank is thirty rectangles and twenty-four mitre lines, every one of which has to divide evenly into the carcase or the elevation looks wrong. What … [Read more...] about CABINETFACE LISP: Parametric Cabinet Elevations in AutoCAD

BOXCULVERT generates the whole detail for a cast-in-place reinforced concrete box. From thirteen numbers you get a complete, dimensioned sheet. What BoxCulvert does Sectional plan through the walls, dimensioned inside and out. Roof plan of the slab over. Section 1 through the side walls, with reinforcement and dowels. Section 2 through the end walls, likewise. And … [Read more...] about BOXCULVERT LISP: Draw a Full RC Box Culvert Detail

BLOCKLOCATE answers “where are all the manholes?” on a drawing too big to see at once. Name a block, or pick one, and every insertion of it is found and shown. What BlockLocate does Three ways to look at the answer. Rays draws temporary lines from a point you pick out to every insertion, so the whole spread is visible in one glance. Step zooms to each … [Read more...] about BLOCKLOCATE LISP: Find Every Insertion of a Block

BANKSLOPE draws the scalloped run of lines that marks an earth bank on a site plan — between the top of a slope and its toe, long and short alternating, each one bowed the opposite way to its neighbour. What BankSlope does Cuttings, embankments, pond edges, bunds, spoil heaps. Pick the top line, pick the bottom, and the hatching is laid between … [Read more...] about BANKSLOPE LISP: Draw Bank and Slope Hatching on Site Plans

BALLOONTAG places a numbered balloon on a leader — the round or hexagonal callout used to key a part on an assembly drawing to a line on the parts list, or a detail on a sheet to the detail that draws it. What BalloonTag does The balloon can be divided into one, two, three or four compartments, which is how detail keys are normally written: detail number … [Read more...] about BALLOONTAG LISP: Numbered Detail Balloons on Leaders