Composition viewer interaction parity with After Effects:
- Snapping (View > Snapping, the Tools bar checkbox, Cmd/Ctrl inverts while
dragging): layer edges, centres and anchor points, mask and shape-path
vertices, comp edges/centre, guides (Snap to Guides) and grid (Snap to
Grid), with highlighted target box / line / cross feedback. Pure maths in
engine::viewer (nearest target within tolerance, priority ties).
- Rulers (Cmd+R) with live pointer markers and a draggable zero point;
guides dragged out of the rulers, moved in the viewer, dragged off to
remove (view.moveGuide / view.removeGuide), lock respected; proportional
grid.
- Show Channel (RGB/Red/Green/Blue/Alpha/RGB Straight, Colorize), exposure
(+/- stops in linear light, reset), Take Snapshot (Shift+F5) with a stored
render and Show Snapshot (F5 held / button held), Fast Previews (Off,
Adaptive Resolution, Draft, Fast Draft, Wireframe), Resolution > Custom.
- Region of interest: drawn in the viewer; RenderOpts.roi renders only that
rectangle (crop of the full render, tested), Crop Comp to ROI uses it.
- Bottom bar in AE 2026 order ("136.1 %", "(Full)").
- Shape Pen (SHP-1): Pen on a shape layer / nothing selected draws Shape n
groups (Path 1, Stroke 1, Fill 1) via shape.newPath; the G slot cycles
Add / Delete / Convert Vertex and Mask Feather; mask.* vertex commands
work on shape paths; mask.insertVertex / mask.convertVertex; marquee
vertex selection, Alt-drag/click converts, double-click free transform
box (path.freeTransform on masks and shape paths).
- Motion paths (ANM-3): keyframe dots and spatial tangent handles, dragging
keys (keys.set) and tangents (keys.setSpatialTangents), parented layers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A real Settings model in the engine (`engine::prefs`): serde, versioned, dotted keys
(`general.undoLevels`, `labels.3.name`), migration of older layouts, unknown keys kept,
persisted through a `ConfigStore` trait (platform config dir on the desktop; MemoryConfig
for tests; the web app can back it with localStorage).
- After Effects 2026 pages (General … Scripting & Expressions) as a schema shared by the
dialog, `prefs.pages` and docs/preferences.md (rows not wired yet are listed there and
kept in step by a test).
- Commands: prefs.get, prefs.set {key, value | values}, prefs.reset {page?}, prefs.open
{page?}, prefs.pages.
- Wired settings: undo levels, path point size, tool tips, layers at comp start / CTI,
default spatial interpolation linear, Home screen on launch, new project template,
rendering progress in Info, adaptive resolution limit, cache when idle, fast previews,
theme + UI brightness, label names/colours everywhere (Label menu, timeline, project,
render queue, viewer), label colour for handles, grid colour/spacing/subdivisions, guide
colour, safe margins, still footage duration, sequence fps, audio output device and
output mapping, layer / footage / preview cache budgets, default 3D renderer.
- Settings dialog: AE's left page list + right content, OK / Cancel (restores) / Previous /
Next, every widget with an automation id.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Angle dial with revolutions (0x+45.0°), point crosshair + on-viewer effect
point controls via a small viewer hook, colour eyedropper sampling the
composited frame, Curves graph editor and Levels histogram/triangles bound
to their params, layer params with a Source/Masks/Effects & Masks companion,
mask (Path) popups, keyframe navigator, drag-to-reorder effect headers.
Engine: effect.copy / effect.paste / effect.reset; effect.remove takes the
selection; Edit > Copy/Paste/Duplicate/Clear act on selected effects; all
undoable.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Integrate main (render queue, timeline/keys, time remap, masks/pen, 3D, MCP/CLI).
- Menu tree now runs renderQueue.add, layer.enableTimeRemap, layer.timeReverse,
layer.freezeFrame/OnLastFrame, prop.separateDimensions, mask.setClosed,
layer.cameraSettings, view.3d.* / view.3d.last / view.reset3DView, main's
layer.autoOrient and keyframe velocity/interpolation/time-stretch dialogs;
matching stubs deleted (view.3d.default stays disabled).
- Keyframe clipboard is main's (keys.copy/paste); Paste Reversed Keyframes
reuses it. Animation-menu commands moved to commands/animation.rs.
- Main's spec menu paths/labels aligned with AE (Camera Settings under
Layer > Camera, "..." labels, Freeze On Last Frame).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Engine (mask.rs, tests in tests_timeline.rs incl. render + undo/redo):
mask.new, mask.addVertex, mask.setVertex, mask.setClosed (Layer > Mask and Shape Path >
Closed), mask.selectVertices, mask.moveVertices (merged drags), mask.deleteVertices
(Delete with vertices selected), mask.remove / mask.removeAll (Layer > Mask). Edits of an
animated Mask Path key the current time.
Viewer: Pen tool on the selected layer - click = corner vertex, drag = Bezier vertex,
click the first vertex to close, Esc/Enter or another tool ends the path; rubber band to
the pointer. Selection tool: click/shift-click mask vertices, drag selected vertices,
drag tangent handles (symmetric; Alt breaks). Vertices register automation ids
viewer.mask.<uid>.vertex.<i>. Mode/inverted/feather/opacity/expansion stay in the
timeline mask rows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Engine (all commands with undo/redo + tests in engine/src/tests_timeline.rs):
- keys.copy/paste (Edit Copy/Cut/Paste route to keys when keys are selected;
relative timing kept, paste at CTI, cross-property paste of same type),
keys.selectAll (Cmd+Alt+A), keys.nudge* (Alt+Arrow, Alt+Shift+Arrow),
keys.set / keys.setEase (graph editor drags), keys.info (dialog data),
keys.timeReverse; keys.interpolation gains continuous/auto Bezier, spatial
interpolation and roving; keys.velocity takes per-dimension values and
Continuous.
- Roving keys (keyframe::retime_roving): constant speed along the motion path.
- Layer > Time: layer.timeStretch (percent|duration, hold in/current/out),
layer.timeReverse (Cmd+Alt+R), layer.enableTimeRemap (Cmd+Alt+T),
layer.freezeFrame, layer.freezeOnLastFrame; render uses Time Remap as the
source time for precomp/footage layers.
- prop.separateDimensions (X/Y/Z Position; prop.set on Position writes them).
- layer.setParent compensates so the layer stays in place (compensate:false
to opt out).
- prop.pickWhip writes AE-style reference expressions (thisComp.layer(..),
effect(..)(..), mask(..).maskFeather, temp=…;[temp,temp], …[0]).
- prop.setExpression: syntax errors keep the text but disable the expression.
- expr: arrays of properties returned by an expression are resolved.
UI: Keyframe Velocity, Keyframe Interpolation and Time Stretch dialogs;
Graph Editor (value + speed graphs, draggable keys and Bezier/influence
handles, auto-zoom, fit, show selected, separate dimensions, hold/linear/
auto Bezier/Easy Ease buttons); key + layer context menus. Clears the
workspace clippy -D warnings failures.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
