Spine::at_length computed tangents from flattened polyline chords, which
are piecewise constant and jump discretely between chords on curved
spines. Steps oriented to the spine with Align to Path stuttered at
large step counts.
Fix: store the original PathData in Spine and compute the tangent from
the original cubic at the true arc-length position via ParamCurveDeriv,
proportionally mapping flattened arc-length s onto each segment's curve
arclength using anchor_length values, instead of using piecewise-constant
chord directions.
Updated segment-selection condition in Spine::at_length to skip segments
whose flattened end is not greater than start before checking whether s is
within the segment. Preserve the existing final-segment fallback so
at_length(0.0) selects a nonzero segment and uses its tangent.
Added zero-derivative fallback tangent for blend-step sampling to keep
Align to Path from passing a zero tangent to atan2.
Added missing docstrings for Spine::new and Spine::length to satisfy
docstring coverage requirements.
Co-authored-by: Craft Bot <bot@storytold.dev>
Spine::at_length computed tangents from flattened polyline chords, which
are piecewise constant and jump discretely between chords on curved
spines. Steps oriented to the spine with Align to Path stuttered at
large step counts.
Fix: store the original PathData in Spine and compute the tangent from
the original cubic at the true arc-length position via ParamCurveDeriv,
proportionally mapping flattened arc-length s onto each segment's curve
arclength using anchor_length values, instead of using piecewise-constant
chord directions.
Updated segment-selection condition in Spine::at_length to skip segments
whose flattened end is not greater than start before checking whether s is
within the segment. Preserve the existing final-segment fallback so
at_length(0.0) selects a nonzero segment and uses its tangent.
Added missing docstrings for Spine::new and Spine::length to satisfy
docstring coverage requirements.
Co-authored-by: Craft Bot <bot@storytold.dev>
Spine::at_length computed tangents from flattened polyline chords, which
are piecewise constant and jump discretely between chords on curved
spines. Steps oriented to the spine with Align to Path stuttered at
large step counts.
Fix: store the original PathData in Spine and compute the tangent from
the original cubic at the true arc-length position via ParamCurveDeriv,
proportionally mapping flattened arc-length s onto each segment's curve
arclength using anchor_length values, instead of using piecewise-constant
chord directions.
Added missing docstrings for Spine::new and Spine::length to satisfy
docstring coverage requirements.
Co-authored-by: Craft Bot <bot@storytold.dev>
Spine::at_length computed tangents from flattened polyline chords, which
are piecewise constant and jump discretely between chords on curved
spines. Steps oriented to the spine with Align to Path stuttered at
large step counts.
Fix: store the original PathData in Spine and compute the tangent from
the original cubic at the true arc-length position via ParamCurveDeriv,
proportionally mapping flattened arc-length s onto each segment's curve
arclength using anchor_length values, instead of using piecewise-constant
chord directions.
Reviewed-by: craft-house-rules
Co-authored-by: Craft Bot <bot@storytold.dev>
Spine::at_length computed tangents from flattened polyline chords, which
are piecewise constant and jump discretely between chords on curved
spines. Steps oriented to the spine with Align to Path stuttered at
large step counts.
Store the original PathData in Spine and compute the tangent from the
original cubic at the true arc-length position via ParamCurveDeriv,
instead of flattened chord directions.
Adds a regression test walking 200 samples along a curved spine and
asserting each tangent step stays under 0.1 radians.
SVG export wrote an SVG filter as a live <filter> when its SVG 1.1 form
was at most 64 KB, without counting the region and id it writes into
it. A filter close to the limit came back over it, SVG import dropped
it, and the reopened object had no filter.
Export now leaves room for the id and the measured region, checks the
SVG 1.1 form the way import does, and counts each character past U+00FF
as the character reference Latin-1 output writes. A filter that does not
fit is exported as the other pixel effects are. The SVG 1.1 form and its
check are kept for the filters seen last, as checked filters already
are, so export does not check one filter again for each object.
Type that SVG text can't draw is written as outlines: vertical type, ruby,
right-to-left text, type on a path with an effect other than Rainbow, an end
bracket, Align to Path, Spacing, hanging punctuation, bullets or inline
graphics. Only glyphs bent along a path gave the outlined group a
`role="img"` and `aria-label`; every other case left screen readers and
search with no text. Each of them now names the group with its text.
Convert to Outlines still writes the paths alone, as before.
Inline graphics' placeholder characters stay out of the name, and empty
type gets none. An object whose id is its name also gets `data-name`, so
opening the file again keeps the name instead of taking the label.
Revolve gave each side face a normal as long as its profile edge, and
the mesh kept that length, so the glTF, OBJ and USD files of a revolved
object carried normals of any length (100 for a wall 100 pt tall). A
face whose edge was shorter than about 0.71 pt fell back to its corners'
normal, which turns inward when the profile is drawn the other way, and
its triangles then faced into the solid.
The mesh now scales every given normal to unit length before choosing
between it and the corners' normal.
A path that keeps its shape because the effect would pass the geometry
budget holds a group's own placed gradients in place. A hidden path in a
layer, which the layer's bounds leave out, no longer holds them, so the
layer's gradient moves with its visible art. The art's own gradients
follow the same rule.
A freeform gradient whose points were edited keeps its vector fitted to
the bounds, so it did not count as placed and its points stayed behind
under a Transform effect and Free Distort unless another placed gradient
was in the same appearance. Its points now move like a placed gradient.
docs/file-format-parity.md held 35 copies of the paragraph under
"Illustrator's private editing data" after #6202 left one, each copy
carrying a different set of the changes merged since. The section now
holds one copy with every clause from the others: placed PDF and .ai
pages as placed documents, Bas Relief among the single-effect art
styles, Bas Relief's settings block in type's art style, the fill a
clipping path keeps with its exceptions, paths with an Art brush, the
spot colors in brush art, symbols defined before the art styles
section, the Type on a Path options, and the artboards the type of a
PDF's later pages goes to.
Align to Path moved the whole line by the largest ascent and descent
among its characters. Each character now moves by its own font, size
and vertical scale. Ascender runs the top of the font's em box along
the path: the ideographic em box that the font's BASE table gives, or
in a Chinese, Japanese or Korean font the one that its typographic or
hhea box, a one-em box-drawing cross or its ideographs give; else an
em box centered on the cap height. Descender runs the bottom of the font's
bounding box along the path, and Center runs a line at half the height
of the top of the font's H along it. In vertical type, Ascender and
Descender move the characters half an em, and Center leaves them on
the path.
Existing documents with Align to Path set to Ascender, Descender or
Center lay their type out at a new distance from the path.
Generic CMYK's tone curves now pass through the CGATS TR 001 tone value
increase of each ink at 40% and 50% (C 20.0, M 17.6, Y 16.8, K 21.6 at
50%), and its 16 Neugebauer primaries mix linearly, so a single ink's
tints gain as TR 001 gives. The 300% ink limit stays. The primaries, the
black-generation curve and the black point are VectorCraft's own values.
- The black point is 90% black under neutral CMY that fills the ink
limit: sRGB black separates to C75 M68 Y67 K90 instead of C67 M67 Y67
K100.
- Black follows a curve over the gray component of the black-free
solve, raised by how far that solve stays lighter than the target.
Grays from sRGB 177 up carry no black, and sRGB 128 gray separates to
C50.5 M42.2 Y42.0 K7.5 instead of C38.8 M26.3 Y29.9 K24.4.
- Display of CMYK fills, swatches and imported CMYK values and the
separation of RGB and Lab colors use the same model.
Paper white still separates to C0 M0 Y0 K0, but other separations
change, and so does the display of CMYK colors with ink. Tests that held
numbers of the old model are updated.
The 2,000,000-triangle limit on a 3D object's meshes is now checked as
each mesh is built, so an object past it is refused before the rest of
its meshes are built:
- Revolve counts each fill's and stroke's mesh as it builds it, instead
of building every one first.
- Inflate still solves every shape's membrane at once (the eye depends
on the highest puff), but builds each solid only when its mesh is
reached (inflate_meshes), so a refused object leaves the later
solids unbuilt.
- All the objects of one 3D asset share one budget
(three_d_meshes_of), so assets.export3D refuses an asset whose
objects pass the limit together.
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