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Trace a face over its footage, and choose where its origin goes

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A face's :head carries :trace {:frames :origin}: the frames its photo holds
on, and whether the head reads every frame, jumps to the trace frames, or
holds frame 0. It replaces :anchors, so which measured frame a head reads is
one stored fact. An instance's :underlay shows the tracing stills over every
face at or below it, registered through each face's own head, at an opacity,
unkeyed. The clip resolver answers where a row path went on its last frame,
so the paint loop reads the photo's matrix instead of resolving again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Olive Vaughn 2026-09-30 02:49:06 -04:00
parent 550cfe91e5
commit 309c47e0a7
23 changed files with 639 additions and 164 deletions
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docs/timing-model.md
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@ -78,7 +78,8 @@ candidate poses so stage cuts can still select any of them.
| --- | --- | --- |
| Source frames and timestamps | Footage/analysis | Constant-rate frame indexing exists; variable timestamps remain future work |
| Head anchor map | `:head` node | Implemented, stored with the node |
| Tracing cel starts and photo address | Authored cel | Separate future work |
| Trace frames (photo address) and origin | Face symbol's `:head` `:trace`, written through `:anchors` | Implemented, see `domain/trace` |
| Showing the tracing photo, and its opacity | Face instance's `:underlay` | Implemented; a drawing aid, not keyed |
| Generated picture-rate proposal and closure protection | Roto clip/symbol | Generated-only picture sampling exists; closure protection remains future work |
| Stage pose cuts | Symbol instance | Implemented, stored with the instance |