Saved corners from an .ai file stay on the same anchors when the
envelope is reflected, as they already did when it was moved or
rotated. A reflected outline runs counter-clockwise; the corners were
then mapped as if the outline had been drawn the other way round, no
longer fit it, and were found again from the outline.
On a tie between two corner anchors, or two nearest outline points,
the one met first along the outline in the order it was drawn wins,
for outlines drawn counter-clockwise too.
The docs state the corner rule in full: a handle 0.01 pt long or
shorter makes an anchor a corner whichever way it turns; otherwise its
tangent unit vectors must differ by 0.01 or more in x or y and turn
out of the outline. Content spreads evenly along a segment without
handles.
An anchor with a handle shorter than 0.01 pt counts as a corner of a top
object whichever way it turns; only an anchor whose tangents differ must
turn out of the outline. docs/mcp.md and the progress line in
docs/target-app-parity.md now say so.
A top-object envelope splits its outline into four sides at four corners
and maps the content onto the Coons patch of those sides. The sides
shared out the content by length, and the corners were the anchors or
curve points nearest the bounding box corners.
Each piece of a side between anchors and corners now takes a share of the
content's width or height in proportion to the length of its control
polygon, spread along the piece by its curve parameter. A straight
segment spreads it evenly by length. A rounded rectangle stays close to
the identity, and the content follows the curves of a side whose segments
differ in size.
Each corner is now the nearest anchor to its bounding box corner among
the sharp anchors that point out of the outline and lie within 47.5% of
the box's width and height from that corner. A handle shorter than
0.01 pt, or tangent unit vectors that differ by 0.01 or more in x or y,
makes an anchor sharp, and the first one along the outline wins a tie.
Without such an anchor, the corner is the outline's nearest point to the
box corner, moved onto the end anchor of its segment within 0.5% of the
segment's parameter. Envelopes opened from .ai files keep the corners the
file saves.
These are VectorCraft's own rules. Existing top-object envelopes redraw by
them. Gradient meshes made from a path keep their sides measured by length.
- crates/doc/src/live/mesh.rs: Coons::from_top_object and the corner
search, used for top-object envelopes.
- EnvelopeKind::TopObject gains an optional `corners` field (anchor
indices); the .ai importer fills it from the mesh's corners.
- Params text of object.envelope.makeWithTopObject, docs/mcp.md
(Envelopes) and a progress line in docs/target-app-parity.md.
Covers the other places a Warp now moves placed gradients: a group's
and a nested group's own strokes and a compound path's stroke (with the
stroke-inflated bounds), the art of a symbol instance and the area of a
compound shape with a Warp, and a stroke's own Warp on the canvas. A
new test checks that Arc's no-bend threshold for gradients matches the
one the warp uses, and the no-bend test now covers all fifteen styles.
The render test's Fisheye case, which left the square's bounds as they
were, is replaced by a vertical Bulge, and each style there is checked
to move the outline's left or right edge. The Object > Expand test
checks that it measures the ramp and not an edge of the outline.
The params text and docs/mcp.md now state which bounds each gradient
follows, and that a warp moves them with a bend or a distortion.
Closing a document told the worker to forget every row whose document was
not open at that moment. The worker keeps that test until it is idle, so
while a job still ran, a document opened afterward had its rows dropped
and they stayed without thumbnails. The worker now forgets only the
documents that closed.
A plug-in of the wrong kind now gets "is a plug-in of kind `exporter`, not an importer", with rows in every complete-message catalog. The importer failure test also covers an open, edited document. docs/plugins.md states that Open Recent does not remember Open With's importer or parameters.
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