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 The variables explorer is parked, not restored: it drove its preview through the same unpublished .html path, so it would have shown an empty frame.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.
3.6 KiB
cursor-glyph-trail
An actor (default: a cursor dot) travels an authored path and deposits small dithered glyphs at its past positions. Each glyph pops in where the actor passed and decays in place; stamps land at fixed arc-length spacing along the path, so the per-second stamp rate scales with the actor's velocity. The jh3yy stamp-and-decay register: the trail is the residue of the motion, fully dissolved before the hold.
4s authored, elastic HOLD, exit none by default.
Variables
| id | type | default | notes |
|---|---|---|---|
glyphs |
string | ░▒▓+·× |
Stamp charset; one glyph per stamp is chosen by a fixed-seed LCG. |
density |
enum | med |
Arc-length spacing between stamps: low (4.6), med (2.9), high (1.8) percent units. |
path |
enum | sweep |
sweep is an S-curve lower-left to upper-right; arc rises over the top; zigzag cuts three straight legs. |
fade |
number | 0.8 |
Per-stamp decay window in seconds, clamped 0.3 to 1.5; per stamp varied 0.75x to 1.25x. |
accent |
enum | green |
Trail and actor color: green rides --brand, blue rides --accent, violet rides --accent-2. |
exit |
enum | none |
none holds until the cut; fade departs opacity-only; up rises out. |
Actor slot
The actor is a slot. Place an inert template anywhere in the HOST page (templates never render, and the runtime wipes the host clip's own children on mount, so the slot lives at document level):
<template data-slot="cursor-glyph-trail-actor">
<img src="./assets/cursor.svg" alt="" style="width: 4cqmin" />
</template>
With no slot, the primitive renders a token cursor dot (accent core, hairline ring, contract tokens only).
Mount
<div
class="clip"
data-composition-id="cursor-glyph-trail"
data-composition-src="./cursor-glyph-trail.html"
data-variable-values='{"path":"zigzag","density":"high","accent":"blue"}'
data-start="0"
data-duration="4"
data-track-index="0"
></div>
Elastic root: no data-width/data-height; it fills whatever box the host clip gives it. Timeline registers under the literal cursor-glyph-trail key.
Notes
- Deterministic: the stamp table (positions, times, glyph choices, jitter, sizes, peaks, decay multipliers) is built once at mount from fixed LCG seed
0x67117a11. Stamps carry no tweens: each stamp's opacity is recomputed on every timeline update as a pure functionf(tl.time() - t_i)of its table row (two sequential tweens on one property render in direction-dependent order under GSAP seeks), and the actor position is recomputed fromtl.time()the same way, so eventful seeks (suppressEvents=false, the engine's render path) land identical frames in any order and either direction. - Density law: stamps land at fixed arc-length spacing, so faster travel deposits more stamps per second; the shared ease (power2-style inOut) makes the trail thin at the ends and dense through the middle.
- Every stamp's decay completes inside IN by construction (
IN = travel + pop + fade * 1.25 + margin), so the HOLD is truly still: the actor rests at the path end and the field is empty. - The travel ease is one shared function used by both the stamp-table sampler and the per-update actor position, so stamps always sit exactly on the actor's past path.