A composition could be placed and played, but not filled. Its tab
puts the picture at the playhead above a timeline of tracks, so a cut
or a cutscene is laid out by dragging assets onto tracks.
- The timeline takes the song tab's geometry with frames for ticks:
ruler in seconds, scrubbing, play and pause, + Track. Zoom and pan
glide through viewTween like the other tabs.
- A placeable asset dropped on a track becomes an item, 3 s long or
as long as its sprite's video. Dropped on an item it lands behind.
- Items move without overlapping. The right edge stops at the next
item. The left edge trims into a video and not before its start.
- An animation dropped on a track becomes a narrower clip bar above
the item it plays on. The asset panel now starts a drag for
animations too.
- The picture is a scene view over compositionHolder. A click picks
an item or its child, a drag moves the real object. It takes no
assets, since an object there would have no item.
- The hierarchy lists the items alive at the playhead. Reparenting is
off there, items stay at the top level.
- The inspector shows a TIMING block on an item (start, length,
offset for a video, Fit to media) and edits tracks and clips.
- Delete, the context menu and Remove item take item and object in
one undo step.
- fitMedia: an override that gives an item another video sets its
length in the same undo step, capped at the next item. Dragging an
edge or typing a length turns it off.
- A composition inside a composition is refused.
Tests:
- Unit composition-edit (new): 19 tests. Four counter-checks each
turned their test red. The "back to 3 s" test got a step in
between after one stayed green.
- e2e 69 (new): 11 checks, 9 own. The hierarchy check reads the rows
shown, after a counter-check on the model's rows stayed green.
- Gate on melektaus-atx: CHECK EXIT 0, 302 files, 4662 tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
adminandClaude Opus 5.5
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