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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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2
static/arthur/app.css
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@ -502,6 +502,8 @@ button.share-button:hover, button.share-button.on { filter: brightness(1.1); }
.stage { display: block; background: var(--stage); }
.paint-overlay { position: absolute; inset: 0; touch-action: none; }
/* The footage traced over: a reference above the picture, never part of it. */
.underlay { position: absolute; inset: 0; pointer-events: none; }
.paint-overlay.drawing { cursor: crosshair; }
.paint-overlay circle { cursor: grab; }