Add Per-Corner Roundness to Rectangle Path: a checkbox (off by default) and four Pixels properties (top-left, top-right, bottom-right, bottom-left). New rectangles initialise the four values from their Roundness, so ticking the box keeps the shape; the radii are animatable and expression-driven.\n\nrect_radii() builds the path clockwise from the top-left with kappa quarter-circle arcs. Overlapping radii scale down like CSS border-radius; negative and non-finite radii are square; rect() delegates to it, so uniform roundness clamps to half the shorter side as before.\n\nLottie rc has one r: four equal static radii export as that value; mixed or animated radii export roundness 0 with a warning. Import puts r into the four per-corner values so ticking the box on an imported rectangle keeps the shape.\n\nTests: path geometry and clamping, rendered per-corner pixels, Lottie equal/mixed/checkbox-off export.
render: upstream moved the tests_*.rs modules into crates/render/src/tests/; the branch's
tests_mask_feather.rs now lives at tests/mask_feather.rs and is registered in tests.rs.
path: rect() keeps the branch's explicit-outline version with an added NaN guard on the
roundness clamp bound (main's fix for the same panic).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
After Effects draws a Rectangle Path clockwise from its top-right corner, or
with round corners from the end of the top-right arc on the right edge;
Trim Paths measures from there (AE 2026, case 930: 400 x 300 rectangles,
Trim 0-25 % and 70 / 30). EffectCraft built the path with kurbo, starting at
the top-left corner, so trimmed rectangles drew another segment: case 930
was 86 of 5184 grid points off (max 255), now 5 at stroke edges. Start > End
was already drawn swapped, as in AE. Convert to Bezier now gives AE's vertex
order (top-right first); the engine test follows. Lottie rectangles share
the path and now start where lottie players start them.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
raster: the inpainting pyramid stops at a missing level, and video inpainting falls back to a
plain patch fill if the previous frame is missing, instead of expect(). path: curve fitting of
an empty point list returns a degenerate cubic instead of indexing/unwrapping, and Merge Paths
no longer has an unreachable!() arm. Denies the panic lints in both crates.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shapes (SHP-2): Stroke Taper (pixels/percent start/end length, width, ease) and
Wave (amount, pixels/cycles, wavelength, phase) rendered as a variable-width
outline; Dash 2/Gap 2/Dash 3/Gap 3 (shape.dashes.add/remove, timeline +/-
buttons); radial gradient Highlight Length/Angle as a focal gradient.
Masks (MSK-1): mask feather points on the Mask Path (mask.featherPoint.*,
Mask Feather tool add/drag), per-point signed radius and tension, rendered
from the signed distance to the path; carried through vertex edits.
Motion blur (LYR-10): Adaptive Sample Limit comp setting; 2D layers take one
sample per pixel of shutter travel between Samples Per Frame and the limit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Library groundwork for mask tracking (MSK-3) and the Warp Stabilizer (TRK-2),
clean-room from published methods:
- track::klt: Shi-Tomasi corners, pyramidal Lucas-Kanade with forward-backward check
- track::fit: RANSAC + least-squares translation/scale/similarity/affine/homography
- track:😷 MaskTracker following the pixels inside a mask outline per frame
- track::stabilize: incremental clip analysis (serde WarpAnalysis), Gaussian path
smoothing (Matsushita 2006), No Motion, preserve scale, crop / auto-scale with
max-scale relaxation
- path::interp: Mask Interpolation correspondence (arc-length vertex insertion,
shape-context matching) and rigid/linear in-betweens
Engine commands, UI and the effect itself are not wired yet (stubs unchanged).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Camille Moine