object.vectorHalftone read frequency, angle, invert, clip and
keepOriginal with readers that fall back to the default for a value of
the wrong type, so {"frequency": "60"} drew a 20 lpi screen. shape and
mode given as a non-string also fell back to circle and mono. Each of
these is now an error and the document is left as it was. A null
value, color included, still stands for the default.
The params docs now state the direction (and the zero) of each angle or
rotation a command takes; behaviour is unchanged. Shape creation, text.create,
the grids, add-on shapes, saved views, Liquify, Puppet Warp pins, Mirror and
Radial Repeat and Vector Halftone turn clockwise; text character rotation,
gradients, the eraser tip and print screen angles turn counter-clockwise.
view.saved.new's rotation note changes its schema, so the API level goes to 3.
A test walks every command's params doc and fails when a param named like an
angle or rotation doesn't say clockwise or counter-clockwise.
Effect › Color Effects › Vector Halftone… (addon.color.halftone, also in
Object › Plug-ins › Color Effects) draws its object as the halftone dots
Object › Vector Halftone makes, live: mono (one dot colour, or each dot in
the art's colour under it) or CMYK screens, the five dot shapes,
frequency, angle, invert and clip to the art's outline.
- The screens, dots and caps move to vectorcraft_effects::addons::halftone,
shared by the command (its behaviour and tests unchanged) and the effect.
- The renderer samples the art (vectorcraft_render::addons::halftone) and
keeps the dots by the object's content and what it reads from the
document, so unchanged art isn't sampled again; past 100000 cells per
screen the object draws as it is.
- Expand Appearance turns the object into its dots, and the SVG, PDF, EPS
and AI exporters write them as paths.
- Its dialog reuses the command's fields, without Keep Original.
Deferred: stochastic and radial patterns, a dot-gain curve, per-screen
separation settings, type or symbols as dots.
Object > Rasterize, Crop Image, Flatten Transparency, Expand
Appearance of raster effects and Vector Halftone draw the art with the
renderer and replace it with the result. When the art held an image
that could not be decoded, the renderer drew nothing for it, and the
result lacked the image with no message. A raster export of the same
art warns that "an image couldn't be decoded and is missing from the
picture".
These five commands now compare decode_failures before and after they
draw, as raster exports do, and their replies carry that text as
`warning`. They still make their result in one undo step. The app
shows a command's `warning` in the status bar: after a menu command,
after OK in a dialog with a preview, and after a tool runs a command
(Crop Image's Apply).
Docs: docs/mcp.md (Flatten Transparency, Expand Appearance, Document
Raster Effects Settings, Vector halftone).
Offset Path, Outline Stroke, the Pathfinder panel, Clean Up, Make
Blend, Rasterize and the other commands that #1429's table marks 3,
except Split Into Grid, added, removed or replaced their objects one at
a time, and so did Remove Anchor Points, Redefine Symbol and the
removal of Shaper groups whose source art is gone. Each insertion or
removal moved the later objects of the layer or group. The lookups by
id that followed walked the tree, and every fourth walk rebuilt the
lookup cache. On 25,000 rectangles a release build of vectorcraft-cli
took 29.1 s for Offset Path.
These commands now make their edits with Document::wrap,
Document::insert_beside and Document::remove_many, in one pass over the
children of each layer or group, and Outline Stroke and Expand write
each new object into the place of the object it replaces. A list that
holds an object twice, or an object and another inside it, and that was
edited without an error before, is still edited one object at a time.
The documents, selections and undo steps are the same. On the same
rectangles Offset Path now takes 1.3 s.
Docs: docs/target-app-parity.md.
The issue asked for a vector halftone that turns art or an image into
vector dots, lines or shapes by tone, with angle, frequency, shape, mono
or CMYK separations and clipping to the object. Nothing like it existed.
object.vectorHalftone renders the selection offscreen, samples its tone
once per cell of a grid turned by the screen angle and places a shape
whose area follows the tone (circle, ellipse, square, diamond or line).
Mono screens follow lightness in one colour; CMYK screens follow the ink
amounts the CMYK output separates, one screen per ink at the classic
angles, multiplied over each other. Dots are clipped to the art's
outline as real geometry (only the dots crossing it go through a
boolean). It is a command rather than a live effect: the live pipeline
can't sample rendered tone when exporting. Its dialog previews live and
OK keeps it as one undo step.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dotCooCoo