mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-07 01:56:04 +00:00
Miguel Ángel
9734578e60
Restores the 208 catalog items reverted after their previews 404'd in production, this time on the payload mechanism rather than the .html files that caused the outage. The generator no longer writes a preview document to docs/public. That writer, and the machinery under it, existed only to produce files the docs host discards, so it is gone rather than bypassed. Items now embed the composition itself via a payload, which is what the previous change already does for the items that were already in the catalog. The variables explorer is parked, not restored: it drove its preview through the same unpublished .html path, so it would have shown an empty frame. Items that declare variables get the live player plus the static variables table, and reconnecting the explorer to payloads is a follow-up.
61 lines
3.1 KiB
Markdown
61 lines
3.1 KiB
Markdown
# slit-scan-reveal
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Time experiment primitive: the frame's rows sample the subject at offset
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times. An authored token mark (accent-ringed disc with an orbit dot)
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sweeps in on ONE pure position function pos(t); a canvas painter draws the
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frame as row (or column) slices, slice i showing the subject's state at
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t - offset(i). Arrival smears through time, near bands leading, far bands
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trailing; on the resolve cue the offsets collapse to zero with one eased
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0.6s pass and the mark holds coherent. 4s authored, elastic HOLD (never
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time-scaled).
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## Mounting
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```html
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<div
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class="clip"
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data-composition-id="slit-scan-reveal"
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data-composition-src="./components/slit-scan-reveal.html"
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data-variable-values='{"axis":"cols","spread":0.6,"accent":"violet"}'
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data-start="0"
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data-duration="4"
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data-track-index="0"
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></div>
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```
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## Variables
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| id | type | default | notes |
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| ---------- | ------ | ------- | --------------------------------------------------------------------------------------------------------- |
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| axis | enum | rows | rows smears across horizontal slices, cols across vertical slices. |
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| spread | number | 0.45 | Maximum sampling offset in seconds across the frame (clamped 0.1 to 1.2). |
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| resolve_at | number | 2.2 | Seconds when the offsets start collapsing. Clamped so the 0.6s collapse and any exit fit inside the clip. |
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| accent | enum | green | green maps to --brand, blue to --accent, violet to --accent-2. |
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| exit | enum | none | none holds the resolved mark (frame roots own transitions); fade or up add a 0.45s departure. |
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## Choreography
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- 0.25s: the subject starts its sweep from the wing (rows: in from the
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left; cols: down from the top, so the slices always cut across the
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travel): cubic-eased travel to dead center with a decaying two-cycle
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sine bob (integer cycles, exactly zero at rest) and a settling scale.
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- Throughout the sweep the slices smear it through time: slice 0 shows
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now, the far slice shows spread seconds ago, with a seeded hairline
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jitter per slice so the edge stays organic.
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- resolve_at: the offsets collapse to zero over 0.6s (eased both ends);
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the smear zips shut onto the resting subject.
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- HOLD: dead still and coherent, elastic with the clip duration.
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Sync point `resolved` fires as the collapse completes; align SFX to it.
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## Determinism
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pos(t) is closed-form, so any sampled time t - offset is exact; per-slice
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jitter is one table computed once at build from fixed LCG seed 0x51175c4e.
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One plain-object anchor tween feeds one painter that clears and redraws
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every slice from scratch as a pure function of the timeline time, so
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eventful seeks land identical frames in any order and either direction.
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The raster basis is the host box measured once at mount; sampled times
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before mount clamp to the subject's start state (not-yet-appeared), and
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after the collapse every slice samples the same resting state.
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