Alter Paths for Appearance wrote every stroke as its filled outline, so a
1 pt circle became two circles and a hatch, and an open arc became a
closed outline and a hatch: two cut lines where a CAM program expects
one. The option now outlines only the strokes a line can't draw: the ones
Preserve Appearance outlines, strokes wider than the widest lineweight
(2.11 mm, to the hundredth), and every stroke in R13 and R14, which have
no lineweights. Other strokes stay CIRCLE, ARC, SPLINE and LWPOLYLINE
entities with their lineweights; R12 keeps them as POLYLINEs with their
width.
A dashed stroke whose offset starts part way into its pattern is now
outlined with Preserve Appearance and with Alter Paths: a linetype always
starts at the start of its pattern, so the dashes were written in the
wrong place.
Laser and cutter software skips HATCH entities, so shapes that were only
filled (type, traced art) reached it as nothing. Each filled area is now
written as its outlines (polylines and splines, in the fill's colour)
followed by the solid hatch; R12 keeps writing the outlines alone.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ASCII DXF of any version opens (document.open) and places (file.place) through
a new reader in vectorcraft-cad: lines, LW/2D/3D polylines with bulge arcs,
circles, arcs, ellipses, NURBS splines (exact Beziers up to cubic, fitted
otherwise), solids, solid and pattern hatches, TEXT/MTEXT/ATTRIB as point
type, named blocks as symbols (one per look for by-block art), anonymous
blocks and dimensions as groups, MINSERT arrays, OCS extrusion; layers keep
off/frozen/locked/plot state; ACI and true colour, lineweights, linetypes and
transparency resolve through layers and blocks. The `dxf` option object picks
the layout, ratio or fit, lineweight scaling, centring and merged layers;
document.dxfInfo lists layouts, layers and units. Binary DXF and DWG answer a
clear error. The DXF Import Options dialog (dxfImport) asks on open and place
with a layout preview. Fuzzed in import_fuzz.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
New crates/cad (L3): a hand-written ASCII DXF writer. Layers become DXF
layers (hidden: off, locked, non-printing: not plotted), straight paths
LWPOLYLINE (POLYLINE before R14), curves cubic SPLINEs through every
anchor, fills solid HATCHes (outlines in R12), strokes lines with a
lineweight and a linetype per dash pattern, type TEXT or glyph outlines,
placed images IMAGE entities linked to PNG or JPEG files. Units and
scale ($INSUNITS), scaled lineweights, 8/16/256 indexed or true colour
(420), transparency (440), Preserve Appearance / Maximize Editability,
Alter Paths for Appearance, Outline Text.
document.export {format: dxf} and document.exportDxf; useArtboards
writes one drawing per artboard; selectedOnly (any export) writes the
selection in its layers. Export As lists DXF (then DXF Options,
ui.dxfOptionsDialog for agents, remembered between exports) and DWG
greyed out; document.formats lists DWG and PICT as unsupported with a
hint, and exporting or opening them answers with it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dotCooCoo