With Scale Strokes & Effects or Transform Patterns on, the path and each copy are moved by Node::transform, which fixed a fitted gradient to its fit before a scale of 0 flattened it to one color. Scaling::keep_fit_when_flat keeps the gradient fitted under a map that flattens the object (node::flattens, the gate fixes_fit already used), and the Transform effect's path transforms set it.
docs/target-app-parity.md also says that the Gradient tool still shows a fitted gradient's vector at its unturned fit.
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.
A gradient placed with the Gradient tool stayed where it was when the
object's Transform or Free Distort effect moved, turned or scaled the
outline, so the shape slid across its own gradient.
The Transform effect now maps placed gradients by its own transform,
and each of its copies takes them as many times as it takes the
transform. Under Free Distort, each path's placed gradients move and
scale from the path's bounds before the effect to its bounds after it.
This change does not alter gradients fitted to the object.
The canvas, Expand Appearance and export, Pathfinder and compound
shapes, groups, a fill's or stroke's own effects, and Object › Expand
of a gradient fill apply the same rule. In a group, the own fills and
strokes of the group, of the groups inside it and of a symbol's art
follow it too, and images and symbol instances that a group's
Transform effect moves take the placed gradients of their own fills
and strokes along. A group whose path keeps its shape because the
effect would pass the geometry budget keeps its own gradients in
place.
This changes how existing documents draw: a gradient placed on a path,
or on an image's or symbol instance's own fill, inside a group with a
Transform effect now moves with it. Before, only the gradients of type
moved (#2214).
How gradients follow each effect is VectorCraft's own rule. The
Distort & Transform help page describes what the effects do to the
object:
https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html
The reference check now applies wherever a painted effect's geometry is
used: a result whose swatch or pattern is refused keeps its input instead
of giving its geometry. Pathfinder art of type, reshaped groups, compound
shapes, image fills, the renderer's bounds and Object > Expand look the
references up in the document, and the renderer drops its kept bounds and
geometry when the names of the swatches or patterns change.
A gradient placed with the Gradient tool stayed where it was when the
object's Warp effect changed the outline, so the warped shape no longer
matched its gradient.
Under each Warp style the placed gradients of a path now move and scale
from the path's bounds before the warp to its bounds after it, as they
do under Free Distort. This applies to an object's own Warp and to a
fill's or stroke's own (a stroke uses its stroke-inflated bounds), on
the canvas and in Object > Expand of the fill. In a group with a Warp
effect, each path's and compound path's gradient follows its own
bounds, and the own fills of the group and of the groups inside it
follow those groups' bounds. A warp with no bend and no distortion
leaves gradients exactly where they are, and gradients fitted to the
object are unchanged.
This changes how existing documents draw: a placed gradient on art with
a Warp effect now follows the warped outline instead of staying in
place.
How gradients follow the warp is VectorCraft's own rule. What the Warp
effects do to the object is described in
https://helpx.adobe.com/illustrator/using/reshaping-objects-effects.html
A gradient fitted to the object refit to the outline after the object's
Transform effect rotated, reflected or scaled it unevenly, so the
gradient kept running left to right while the shape turned under it.
Object › Transform already turns such a gradient.
A Transform effect that a refit would not reproduce now fixes the
gradient to its fit on the geometry the effect takes, and then maps it
with that effect and the effects after it, as a placed gradient. Under
moves and even scales it draws as a refit does, and an effect that
scales the object to nothing across leaves it fitted. This applies to
an object's own effects, a fill's or stroke's own effects, and a
group's: in a group, the gradients fitted to its paths, to its own
fill, to the groups inside it and to its images' and symbol instances'
own fills each fix to the fit on their own object. Object › Expand of
the fill draws the same.
This changes how existing documents draw: art with a fitted gradient
and a Transform effect that rotates, reflects or scales it unevenly
now shows the gradient turned with the art. How gradients follow the
effect is VectorCraft's own rule.
A gradient placed with the Gradient tool stayed where it was when the
object's Transform or Free Distort effect moved, turned or scaled the
outline, so the shape slid across its own gradient.
The Transform effect now maps placed gradients by its own transform,
and each of its copies takes them as many times as it takes the
transform. Under Free Distort, each path's placed gradients move and
scale from the path's bounds before the effect to its bounds after it.
This change does not alter gradients fitted to the object.
The canvas, Expand Appearance and export, Pathfinder and compound
shapes, groups, a fill's or stroke's own effects, and Object › Expand
of a gradient fill apply the same rule. In a group, the own fills and
strokes of the group, of the groups inside it and of a symbol's art
follow it too, and images and symbol instances that a group's
Transform effect moves take the placed gradients of their own fills
and strokes along. A group whose path keeps its shape because the
effect would pass the geometry budget keeps its own gradients in
place.
This changes how existing documents draw: a gradient placed on a path,
or on an image's or symbol instance's own fill, inside a group with a
Transform effect now moves with it. Before, only the gradients of type
moved (#2214).
How gradients follow each effect is VectorCraft's own rule. The
Distort & Transform help page describes what the effects do to the
object:
https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/distort-and-transform-effects-in-illustrator.html
Follow-up to #4345 / #4145 per maintainer guidance from @bflatastic.
- In `crates/effects/src/geometry.rs` & `crates/effects/src/reshape.rs`:
- Implements `optimize_geometry_effects`: reorders pure-translation Transform effects
with copies after a terminal round-join Offset Path effect when the effective style is safe
(NonZero fill and no stroke).
- Offsetting a union equals the union of offsets for round (Minkowski) offsets; moving
pure-translation copies after the terminal offset evaluates Offset Path once on the base
geometry rather than over dozens of multiplied copies, turning O(copies * segments) planar
sweep explosion into a single fast offset plus lightweight affine copies.
- Safely commutes across multiple consecutive pure-translation Transform effects.
- Preserves exact visual geometry by leaving miter, bevel, EvenOdd, stroked, or non-terminal
effect stacks in their original order.
- Added comprehensive unit and regression tests in `crates/effects/src/tests.rs`.
- Added contributor entry in `contributors/people.toml`.
dotCooCoo