AutoLISP Routines

Draws a boundary, a traverse or a road centreline straight from the way survey data is written on a deed or in a field book — a bearing and a distance for each leg, and a radius for each curve. TRAVERSE enters the legs and draws them as one polyline. INVERSE works the other way: pick two points and be told the bearing and distance between them, in surveyor’s … [Read more...] about TRAVERSE LISP: Boundaries From Bearings and Distances

Three shapes AutoCAD has no command for. SPIRAL draws a flat Archimedean spiral. SLOT draws a slotted hole at any angle. FLANGE draws a bolted flange in plan. What ShopShapes does SPIRAL  a flat Archimedean spiral - the kind used for coils, springs seen         on edge, scroll details and clock springs. HELIX draws a … [Read more...] about SHOPSHAPES LISP: Spirals, Slotted Holes and Bolted Flanges

Draws a rafter as it is actually cut — the sloping member, the birdsmouth seat where it sits on the wall plate, the tail overhang, and the blocking behind the seat. RAFTER draws a single cut rafter; RAFTERTRUSS draws a truss rafter with separate top and bottom cords. Both will mirror about the ridge to give you the opposite side in the same operation. What … [Read more...] about RAFTERCUT LISP: Cut Rafters and Truss Rafters in Section

FASTENER draws hexagon nuts, socket head cap screws and flat (countersunk) head cap screws in side elevation, at any angle, at any thread diameter, as ordinary lines and arcs. Nothing is inserted as a block, so a fastener can be trimmed into an assembly or edited member by member. What FastenerKit does Fastener head sizes are not a constant multiple of thread … [Read more...] about FASTENER LISP: Hex Nuts and Cap Screws in Side Elevation

BATT fills a cavity with the standard batt insulation squiggle — the serpentine loop run used on wall sections, roof build-ups and partition plans to show what is insulated. Pick along one face of the cavity, give the thickness or pick the opposite face, and the run is filled between the two. What BattInsul does Note: there are two BATT routines on this … [Read more...] about BATT LISP: Fibreglass Batt Insulation Symbol

Draws a double-hung window two ways. WINDOWELEV draws the elevation — outer casing, frame, sill, meeting rail, both sashes and any number of glazing bars. WINDOWPLAN draws the plan — cutting the opening through the wall, with jambs, glass line and sill projection. What WindowSymbol does Everything is measured from the frame opening — the hole the … [Read more...] about WINDOWPLAN LISP: Double-Hung Window in Plan and Elevation