A DWF sheet or DGN model is drawn as world-space wires (one line wire per
colour and width, one fill wire per colour) instead of a raster rescaled
to the view, so it stays sharp while zooming instead of showing pixels
until the raster is made again. Colours go through the colour table
mapping, contrast, fade and monochrome; clip boundaries clip the wires.
The wires are drawn and plotted but neither picked nor snapped; the
underlay's own snap geometry still serves object snaps.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
One-pixel hairlines keep horizontal and vertical pieces solid, but
slanted pieces and curves are anti-aliased: their pixel steps broke up
into dashes once the raster was scaled to the screen.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- V8 models are placed relative to their global origin (model header).
- A V8 model's extent is the union of its elements' stored ranges; a V7
model's text box is one text height tall.
- Files without a colour table use the standard DGN default table; colour
255 is read from the table's background entry.
- Colours from a file's colour table follow the background: near-white
colours swap with it, and over non-black backgrounds some shades drop a
step.
- DGN contrast pulls towards a pivot taken from the model's own colours,
after the fade, which is blended into the background first.
- Shared cells are read through their full 3D placement, so tilted
instances and 3D definitions are drawn in plan.
- Deleted V8 elements are skipped; lines along the model's extent stay in
the raster.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Insert > Reference: the PDF Attach button becomes an Attach Underlay menu
(PDF / DWF / DGN); its face runs the last one chosen.
- DWFATTACH, DGNATTACH and ATTACH on a .dwf/.dwfx/.dgn open the Attach
dialog for that kind: sheets or models with thumbnails (one chosen),
placement, path type, file details with the sheet / model size, and for
DGN the conversion units (sub units offer 1 / sub units per master as the
scale).
- DGN V8 true colours come from the ExtendedColors record packed in the
non-model attributes stream; the colour word's high part numbers them.
- A DGN model's extent includes each text's box (its length along the
baseline and 1.5 x its height), as the reference sizes a model.
- DWFx text uses the family named in its embedded (deobfuscated) font.
- DWF contrast pivots at 0.73 once colours are turned over for a dark
background.
- Hairline strokes are drawn solid one pixel wide, and underlay rasters are
made at or below their size on screen so those lines stay unbroken.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- PDFOSNAP, DWFOSNAP and DGNOSNAP are separate; UOSNAP sets them all and
reads 2 while they differ. Enable Snap switches the selected kind's.
- DWFCLIP / DGNCLIP clip their own kind with the kind's prompts and message;
CLIP routes DWF and DGN underlays there; Enter at a corner asks again.
- The right-edge underlay tools show for DWF and DGN too (import is PDF
only).
- Underlay layers: DGN levels (V8 level table, "Default" listed as "0"; V7
used levels named from the level name table), hidden through the layer
override data with the DGN placeholder string first; a plotted DWF has
none.
- V8 colour read from its colour word (by level, index, or a true colour
drawn as its nearest index); 3D V8 elements drawn in plan (lines, line
strings, ellipses and arcs by their orientation, text); a model's extent
includes its text.
- DWF 6 TrueType text (font, height, rotation from the font opcode) and DWFx
glyph runs are drawn; the default W2D colour map is the measured one.
- Contrast pulls lightness towards a per-kind pivot as measured (PDF 0.5,
DWF 0.243, DGN 0.65).
- Zoom extents includes raster images and underlays whose frames are hidden.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A page shown small was drawn from its full-size raster and thin lines broke
up into dots. Once a zoom settles on another quarter-octave step, PDF, DWF
and DGN underlays are rasterised again near their size on screen (never
above the full-size raster), frames are requested until that happens, and
the adjusted-pixel memo is kept per raster size. V7 element weights no longer
widen strokes, matching V8 models.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DWFATTACH / -DWFATTACH and DGNATTACH / -DGNATTACH attach a DWF / DWFx sheet
or a DGN (V7 or V8) model with the reference's prompts; ATTACH routes the
file types to them. The sheet or model is read into vector paths, drawn as a
transparent underlay raster (contrast, fade, monochrome and background
adjustment apply) and offers its geometry to object snaps. Definitions are
kept in ACAD_DWFDEFINITIONS / ACAD_DGNDEFINITIONS, the External References
palette lists and reloads them, and image textures get line-keeping mip
levels so thin underlay lines stay visible when zoomed out.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
