Files
hyperframes/docs/catalog/blocks/loop-spiralstream.mdx
Miao YangandClaude Fable 5.1 44c43fd99f feat(registry): add 249 seamless image-loop blocks (95 motion families, 1:1)
One block per loop variant (loop-<family>[-<n>], 1080x1080), one hand-written engine per family,
driven by a single paused GSAP timeline that recomputes every card transform from t. Every engine
parameter is exposed through data-composition-variables, grouped like a template editor's panel
(Media / Background / Appearance / Animation / Template options), plus image1..N content slots
that default to monochrome SVG placeholders. No third-party media ships.

Validation: scripts/lint-registry-items.mjs 249/249, oxfmt clean, hyperframes check on one variant
per family (95/95), registry.json + docs/catalog pages regenerated by the repo scripts. Previews are
rendered locally (720^2) and need the docs-images upload.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-09 18:40:32 +08:00

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---
title: "Loop Spiral Stream"
description: "A helical ribbon of image slots winds toward the camera. 8 image slots, 24s seamless loop, 1:1."
---
import { InstallCommand } from "/snippets/install-command.jsx";
<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/loop-spiralstream.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/loop-spiralstream.png" autoPlay muted loop playsInline />
## Install
<InstallCommand command="npx hyperframes add loop-spiralstream" item="loop-spiralstream" />
That writes one file: `compositions/loop-spiralstream.html`.
## Add it to your video
It runs for 24 seconds at 1080×1080. Paste this into your composition:
```html index.html
<div
data-composition-id="loop-spiralstream"
data-composition-src="compositions/loop-spiralstream.html"
data-start="0"
data-duration="24"
data-track-index="1"
data-width="1080"
data-height="1080"
></div>
```
Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes) for the rest.
## Variables
Every one of these has a default, so the piece works untouched. Set the ones you
want to change on the element:
| Variable | Default | Accepts | What it does |
| --- | --- | --- | --- |
| `mediaFit` | `natural` | `natural`, `crop` | Natural keeps each image's own ratio; Crop fills the card box at the media aspect below. |
| `cropAspectRatio` | `1:1` | `16:9`, `9:16`, `1:1`, `4:5`, `3:2`, `3:4`, `2:3` | Card aspect used when Fit is Crop. |
| `backgroundType` | `gradient` | `gradient`, `color`, `image` | Gradient (start → end colours), flat Colour, or your own Image. |
| `backgroundGradientStart` | `#111111` | color | Top colour of the gradient. |
| `backgroundGradientEnd` | `#444444` | color | Bottom colour of the gradient. |
| `backgroundColor` | `#0b0b0f` | color | Flat colour when Type is Color; also the ground under an Image. |
| `backgroundImage` | `` | image | Cover-fitted background when Type is Image. |
| `blurAmount` | `0` | 0px to 60px, step 1px | Blur on the background image, px. |
| `backgroundGradientNoise` | `0` | 0% to 100%, step 1% | Film-grain overlay strength. |
| `backgroundOpacity` | `1` | 0 to 1, step 0.05 | Opacity of the whole background layer (0 = transparent ground). |
| `scaleIntensity` | `0.33` | 0 to 1, step 0.05 | Strength of the size change. |
| `borderRadius` | `32` | 0px to 200px, step 1px | Card corner radius in px at 1080. |
| `easing` | `smooth` | `custom`, `smooth`, `natural`, `slowdown`, `snappy`, `accelerate`, `elastic`, `bounce`, `overshoot`, `impulse`, `swing`, `linear` | Easing family for stepped motion. |
| `easeBezier` | `0.50,0.00,0.50,1.00` | string | Cubic-bezier control points for custom easing. |
| `direction` | `down` | `down`, `up` | Direction of travel. |
| `motion` | `flow` | `flow`, `pulse`, `steps` | Motion (engine parameter; see the block header comment). |
| `padding` | `6` | 0px to 100px, step 1px | Padding (engine parameter; see the block header comment). |
| `turns` | `3.75` | 0 to 8, step 0.1 | Turns (engine parameter; see the block header comment). |
| `cardCount` | `24` | 0 to 48, step 1 | Card Count (engine parameter; see the block header comment). |
| `pulse` | `60` | 0 to 120, step 1 | Pulse (engine parameter; see the block header comment). |
| `ringSize` | `62` | 0 to 124, step 1 | Ring Size (engine parameter; see the block header comment). |
| `taper` | `0` | 0 to 2, step 0.01 | Taper (engine parameter; see the block header comment). |
| `cardStyle` | `curved` | `curved`, `upright` | Card Style (engine parameter; see the block header comment). |
| `backFade` | `55` | 0 to 110, step 1 | Back Fade (engine parameter; see the block header comment). |
| `perspective` | `20` | 0 to 40, step 1 | Camera focal length: smaller = stronger perspective. |
| `tilt` | `0` | -180° to 180°, step 1° | Tilt (engine parameter; see the block header comment). |
| `gap` | `28` | 0px to 56px, step 1px | Spacing between cards. |
| `image1` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 1 of 8. Any aspect; fitted per mediaFit. |
| `image2` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 2 of 8. Any aspect; fitted per mediaFit. |
| `image3` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 3 of 8. Any aspect; fitted per mediaFit. |
| `image4` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 4 of 8. Any aspect; fitted per mediaFit. |
| `image5` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 5 of 8. Any aspect; fitted per mediaFit. |
| `image6` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'477.36800000000005' cy%3D'505.896' r%3D'26.004' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 6 of 8. Any aspect; fitted per mediaFit. |
| `image7` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1050' height%3D'1400' viewBox%3D'0 0 1050 1400'%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1050' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1046' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M189 995.05H558.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M223.65 995.05L316.05 879.55L408.45 995.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'489.3' cy%3D'891.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 7 of 8. Any aspect; fitted per mediaFit. |
| `image8` | `data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1400' viewBox%3D'0 0 1400 1400'%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1400' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1396' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 1037.4H744.8' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'22' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M298.2 1037.4L421.4 883.4L544.5999999999999 1037.4Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'652.4000000000001' cy%3D'898.8' r%3D'46.199999999999996' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E` | image | Image on card 8 of 8. Any aspect; fitted per mediaFit. |
Set them with `data-variable-values` on the element that mounts it. These are the
defaults, so this behaves exactly like the preview above until you change one:
```html wrap
<div
data-composition-id="loop-spiralstream"
data-composition-src="compositions/loop-spiralstream.html"
data-variable-values='{"mediaFit":"natural","cropAspectRatio":"1:1","backgroundType":"gradient","backgroundGradientStart":"#111111","backgroundGradientEnd":"#444444","backgroundColor":"#0b0b0f","backgroundImage":"","blurAmount":0,"backgroundGradientNoise":0,"backgroundOpacity":1,"scaleIntensity":0.33,"borderRadius":32,"easing":"smooth","easeBezier":"0.50,0.00,0.50,1.00","direction":"down","motion":"flow","padding":6,"turns":3.75,"cardCount":24,"pulse":60,"ringSize":62,"taper":0,"cardStyle":"curved","backFade":55,"perspective":20,"tilt":0,"gap":28,"image1":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'1050' viewBox%3D'0 0 1400 1050'%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'1050' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'1046' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 778.05H621.6' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'16.5' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M286.65 778.05L379.05 662.55L471.45 778.05Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle cx%3D'552.3' cy%3D'674.1' r%3D'34.65' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3C%2Fsvg%3E","image2":"data:image/svg+xml,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'1400' height%3D'788' viewBox%3D'0 0 1400 788'%3E%3Crect width%3D'1400' height%3D'788' fill%3D'%230b0b0f'%2F%3E%3Crect width%3D'1400' height%3D'788' fill%3D'rgba(255%2C255%2C255%2C0.18)'%2F%3E%3Crect x%3D'2' y%3D'2' width%3D'1396' height%3D'784' fill%3D'none' stroke%3D'rgba(255%2C255%2C255%2C0.14)' stroke-width%3D'4'%2F%3E%3Cpath d%3D'M252 583.908H529.376' stroke%3D'rgba(255%2C255%2C255%2C0.45)' stroke-width%3D'12.382857142857144' stroke-linecap%3D'round'%2F%3E%3Cpath d%3D'M278.004 583.908L347.348 497.228L416.692 583.908Z' fill%3D'rgba(255%2C255%2C255%2C0.45)'%2F%3E%3Ccircle 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></div>
```
## Source
<Accordion title={`loop-spiralstream.html`}>
```html
<!doctype html>
<html
lang="en"
data-composition-variables='[{"id":"mediaFit","type":"enum","role":"style","label":"Media · Fit","description":"Natural keeps each image&#39;s own ratio; Crop fills the card box at the media aspect below.","default":"natural","options":[{"value":"natural","label":"Natural (original ratio)"},{"value":"crop","label":"Crop"}]},{"id":"cropAspectRatio","type":"enum","role":"style","label":"Media · Aspect","description":"Card aspect used when Fit is Crop.","default":"1:1","options":[{"value":"16:9","label":"16:9"},{"value":"9:16","label":"9:16"},{"value":"1:1","label":"1:1"},{"value":"4:5","label":"4:5"},{"value":"3:2","label":"3:2"},{"value":"3:4","label":"3:4"},{"value":"2:3","label":"2:3"}]},{"id":"backgroundType","type":"enum","role":"style","label":"Background · Type","description":"Gradient (start → end colours), flat Colour, or your own Image.","default":"gradient","options":[{"value":"gradient","label":"Gradient"},{"value":"color","label":"Color"},{"value":"image","label":"Image"}]},{"id":"backgroundGradientStart","type":"color","role":"style","label":"Background · Gradient start","description":"Top colour of the gradient.","default":"#111111"},{"id":"backgroundGradientEnd","type":"color","role":"style","label":"Background · Gradient end","description":"Bottom colour of the gradient.","default":"#444444"},{"id":"backgroundColor","type":"color","role":"style","label":"Background · Color","description":"Flat colour when Type is Color; 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>
<head>
<title>loop-spiralstream</title>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1080, height=1080" />
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 1080px;
height: 1080px;
overflow: hidden;
background: #0b0b0f;
}
#loop-spiralstream-bg {
position: absolute;
inset: 0;
}
#loop-spiralstream-stage {
position: absolute;
inset: 0;
perspective-origin: 50% 50%;
}
/* never put opacity/filter in will-change on preserve-3d elements: it flattens them silently */
#loop-spiralstream-world,
.card {
position: absolute;
left: 50%;
top: 50%;
width: 0;
height: 0;
transform-style: preserve-3d;
}
#loop-spiralstream-world {
left: 50%;
top: 50%;
}
.card {
left: 0;
top: 0;
}
/* rotate about the slot origin, not the slice centre (see templates/3d.html) */
.slice {
position: absolute;
left: 0;
top: 0;
overflow: hidden;
transform-origin: 0 0;
}
.slice img {
display: block;
object-fit: cover;
}
.slice .shade {
position: absolute;
inset: 0;
background: #000;
}
</style>
</head>
<body>
<div
id="loop-spiralstream-root"
data-composition-id="loop-spiralstream"
data-start="0"
data-width="1080"
data-height="1080"
data-duration="24"
>
<div
id="loop-spiralstream-loop"
class="clip"
data-start="0"
data-duration="24"
data-track-index="1"
data-layout-allow-overflow
>
<div id="loop-spiralstream-bg"></div>
<div id="loop-spiralstream-stage"><div id="loop-spiralstream-world"></div></div>
</div>
</div>
<script>
// Shared runtime for the the reference tool loop ports. Loaded by every family engine.
// Everything here is a pure function of the HyperFrames variables + t.
//
// Reference constants (measured on the 512x512 preview library, 2026-09-08):
// Marquee planeSize -> 0.3% of frame height per unit (7 variants, all 1.54px/unit @512)
// Marquee gap -> 0.2% of frame height per unit
// 3D perspective -> CSS focal length f = 1000px * (100/perspective) at H=1080
// (3D01/02/08/11: card widths & far-card spacing match to <3%)
// Both are calibrated on a SQUARE canvas; for 16:9 we scale by H. ponytail: if the
// dashboard 16:9 reference shows width-relative scaling, flip REF below to W.
window.RF = (() => {
// Variables are injected by the inline script via RF.use(): HyperFrames wraps INLINE scripts in a
// per-composition scope where getVariables() resolves; this external file only sees the host window.
const V = {},
MEDIA = [];
const use = (vars, media) => {
Object.assign(V, vars || {});
MEDIA.splice(0, MEDIA.length, ...(media || []));
};
const root = document.querySelector("[data-composition-id]");
const W = +root.dataset.width,
H = +root.dataset.height;
const REF = H;
const num = (k, d) => (V[k] !== undefined && V[k] !== "" && !isNaN(+V[k]) ? +V[k] : d);
const str = (k, d) => (V[k] !== undefined && V[k] !== "" ? String(V[k]) : d);
const on = (k, d) => /^(true|on|1)$/i.test(str(k, d ? "on" : "off")); // spec booleans arrive as "true"/"false", enums as on/off
function pick(n) {
n = Math.max(1, Math.min(MEDIA.length, n | 0));
return MEDIA.slice(0, n);
}
// aspect (w/h) a card takes for a media item under mediaFit + cropAspectRatio
function aspect(m, fit, cropAR) {
if (fit === "natural") return m.w / m.h;
const [a, b] = String(cropAR || "1:1")
.split(":")
.map(Number);
return a && b ? a / b : 1;
}
function card(m, w, h, radius) {
const el = document.createElement("div");
el.className = "card";
el.style.cssText = `position:absolute;width:${w}px;height:${h}px;overflow:hidden;border-radius:${radius}px;`;
const img = document.createElement("img");
img.src = m.src;
img.width = Math.round(w);
img.height = Math.round(h);
img.style.cssText = `display:block;width:${w}px;height:${h}px;object-fit:cover;`;
el.appendChild(img);
return el;
}
function background(el) {
// the editor's Background panel: type gradient | color | image, gradient start/end, grain (noise %), opacity, image blur
const type = str("backgroundType", "gradient");
const c = str("backgroundColor", "#0b0b0f");
el.style.background = c;
if (type === "gradient") {
const g1 = str("backgroundGradientStart", "#111111"),
g2 = str("backgroundGradientEnd", "#444444");
el.style.background = `linear-gradient(180deg, ${g1}, ${g2})`;
} else if (type === "image") {
const im = V.backgroundImage,
src = im && typeof im === "object" ? im.url || im.src || "" : im || "";
if (src) {
el.style.background = `${c} url("${src}") center / cover no-repeat`;
const b = num("blurAmount", 0);
if (b > 0) el.style.filter = `blur(${b}px)`;
}
}
el.style.opacity = String(Math.max(0, Math.min(1, num("backgroundOpacity", 1))));
const noise = num("backgroundGradientNoise", 0);
if (noise > 0) {
const g = document.createElement("div");
g.style.cssText = `position:absolute;inset:0;pointer-events:none;mix-blend-mode:overlay;opacity:${((noise / 100) * 0.7).toFixed(3)};background:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'256'%20height%3D'256'%3E%3Cfilter%20id%3D'n'%3E%3CfeTurbulence%20type%3D'fractalNoise'%20baseFrequency%3D'0.9'%20numOctaves%3D'3'%20stitchTiles%3D'stitch'%20seed%3D'7'%2F%3E%3CfeColorMatrix%20values%3D'0%200%200%200%200.5%200%200%200%200%200.5%200%200%200%200%200.5%200%200%200%201%200'%2F%3E%3C%2Ffilter%3E%3Crect%20width%3D'256'%20height%3D'256'%20filter%3D'url(%23n)'%2F%3E%3C%2Fsvg%3E") 0 0 / 256px 256px repeat`;
el.appendChild(g);
}
}
const expoInOut = (x) =>
x <= 0
? 0
: x >= 1
? 1
: x < 0.5
? Math.pow(2, 20 * x - 10) / 2
: (2 - Math.pow(2, -20 * x + 10)) / 2;
const frac = (x) => x - Math.floor(x);
return {
V,
use,
W,
H,
REF,
num,
str,
on,
MEDIA,
pick,
aspect,
card,
background,
expoInOut,
frac,
};
})();
</script>
<script>
(async () => {
// SpiralStream loop family — a helical RIBBON of `cardCount` slots winding
// `turns` times around a vertical axis; the cards stream along it (down = right-and-down at the front),
// exactly cardCount slots per loop, so the slot geometry is static and only the images travel.
// Measured on the 512 preview (2026-09-08, /tmp/rf-spiral):
// ring: radius R = ringSize% * (H - 2*padding%) / 2 (139.5 vs 138.7 fitted from silhouette 142.5 and the
// front/back card-height ratio 146/91.5); CSS-perspective camera with the ring centred at z=0 and
// f = 1.18*H (fov ~46deg) — the `perspective` unit is unmeasured (one variant), exposed as 20/perspective.
// slots: card k at phi = (k - N/2)*turns*360/N, y = (k - N/2)*HT/N with HT = 2*(H - 2*padding%) (per-slot
// dy 37.5 vs 38.2 measured); slot 12 sits at the frame centre at t=0 (card edges 187..323 symmetric).
// cards: vertical-sided helical segments (per-column height constant, top/bottom follow the slope +0.33 px/px);
// arc = 45.4deg of the 52.3deg slot -> slot arc minus gap (gap = 28px @1080 scaled by H; front gap 15px);
// vertical height hv = 0.75*scaleIntensity*(H - 2*padding%) (111 vs 111 fitted); curved = 12 skewed slices.
// flow: LINEAR, 1.744deg/frame = one slot (52.3deg) per second on the 24-card/24s preview; each 1s step repeats the
// geometry (frames 0/30/60 identical). direction down = phi increasing at the front (cards move right).
// fade: backFade% black at the back, 0 at the front, ramp (1 - cos phi)/1.17 clamped (back plateaus 45/52 = 0.42-0.45x
// already at phi~100). The ref is ASYMMETRIC (right card 0.98x, left 0.6-0.7x) — looks like a directional
// light from the front-right, not reproduced.
// corners: ~8px @512 even with borderRadius 0 -> 1.6% of H floor.
// Knobs (guesses): motion steps/pulse = eased 1-slot steps (pulse = moving fraction of the step); taper = linear
// radius shrink toward the bottom (taper% of R); tilt = rotateX of the whole helix in degrees; scalePulse ignored;
// easing enum applies to steps only; mediaFit natural -> object-fit cover (slot arc is fixed by the count).
// media list [{src,w,h}] is inlined by build.mjs; HyperFrames scopes inline scripts, so hand both to the shared lib explicitly
const __V = Object.assign(
{},
(window.__hyperframes && window.__hyperframes.getVariables
? window.__hyperframes.getVariables()
: null) || {},
{ loopDuration: 24, loopRepeat: 2, imageCount: 8 },
);
const __PH = [
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];
const __MEDIA = await Promise.all(
["image1", "image2", "image3", "image4", "image5", "image6", "image7", "image8"].map(
async (id, i) => {
const v = __V[id];
const src = (v && typeof v === "object" ? v.url || v.src : v) || __PH[i];
const img = new Image();
img.src = src;
try {
await img.decode();
} catch (e) {}
return { src, w: img.naturalWidth || 1400, h: img.naturalHeight || 1050 };
},
),
);
RF.use(__V, __MEDIA);
const { W, H, REF, num, str, pick, background, frac } = RF;
const DUR = num("loopDuration", 24);
const PAD = (num("padding", 6) / 100) * REF;
const N = Math.max(2, num("cardCount", 24) | 0);
const TURNS = num("turns", 3.75);
const DOWN = str("direction", "down") === "down";
const MOTION = str("motion", "flow");
const PULSE = Math.min(100, Math.max(1, num("pulse", 60))) / 100;
const RING = num("ringSize", 62) / 100;
const TAPER = num("taper", 0) / 100;
const SCALE = num("scaleIntensity", 0.33);
const CURVED = str("cardStyle", "curved") === "curved";
const BFADE = Math.min(100, Math.max(0, num("backFade", 55))) / 100;
const PERSP = Math.max(1, num("perspective", 20));
const TILT = num("tilt", 0);
const GAP = (num("gap", 28) * REF) / 1080;
const RADIUS = Math.max((num("borderRadius", 0) * REF) / 1080, 0.016 * REF);
const IMAGES = pick(num("imageCount", 16));
const NI = IMAGES.length;
document.getElementById("loop-spiralstream-loop").dataset.duration = DUR;
background(document.getElementById("loop-spiralstream-bg"));
const INNER = REF - 2 * PAD;
const R = (RING * INNER) / 2;
const HT = 2 * INNER; // total helix height (guess, 2% fit)
const f = 1.18 * REF * (20 / PERSP);
const HV = 0.75 * SCALE * INNER;
// preview measures 52.3deg/slot and 52.3deg/s for turns=3.75, N=24 (= 3.5 turns): calibrated by 14/15, unit unverified
const STEP = (TURNS * (14 / 15) * 360) / N; // deg per slot
const SLOT = (2 * Math.PI * R * STEP) / 360; // arc per slot, px at z=0
const ARC = Math.max(SLOT * 0.2, SLOT - GAP); // card arc length (front gap 15px @512 = 28px @1080 scaled)
const SLICES = CURVED ? 12 : 1;
const SKEW = (Math.atan(HT / N / SLOT) * 180) / Math.PI; // slope of the band: y per arc px (top/bottom edges stay continuous across slices)
const stage = document.getElementById("loop-spiralstream-stage");
stage.style.perspective = f + "px";
const world = document.getElementById("loop-spiralstream-world");
world.style.transform = `rotateX(${TILT}deg)`;
// cubic-bezier easing (x monotone) by bisection — for motion=steps/pulse only
const bezier = (x1, y1, x2, y2) => (x) => {
if (x <= 0) return 0;
if (x >= 1) return 1;
let lo = 0,
hi = 1,
s = 0.5;
for (let i = 0; i < 24; i++) {
s = (lo + hi) / 2;
const bx = 3 * (1 - s) * (1 - s) * s * x1 + 3 * (1 - s) * s * s * x2 + s * s * s;
if (bx < x) lo = s;
else hi = s;
}
return 3 * (1 - s) * (1 - s) * s * y1 + 3 * (1 - s) * s * s * y2 + s * s * s;
};
const EASES = {
smooth: [0.65, 0, 0.35, 1],
linear: [0, 0, 1, 1],
slowdown: [0, 0, 0.2, 1],
accelerate: [0.4, 0, 1, 1],
natural: [0.25, 0.1, 0.25, 1],
snappy: [0.4, 0, 0.2, 1],
};
const eName = str("easing", "smooth");
const ease = bezier(
...(eName === "custom"
? str("easeBezier", "0.50,0.00,0.50,1.00").split(",").map(Number)
: EASES[eName] || EASES.smooth),
);
// one card = SLICES planes facing outward, each following the helix slope at its own angle
const cards = [];
for (let i = 0; i < N; i++) {
const m = IMAGES[i % NI];
const el = document.createElement("div");
el.className = "card";
const sw = ARC / SLICES,
dAng = ((sw / R) * 180) / Math.PI;
const slices = [];
for (let k = 0; k < SLICES; k++) {
const s = document.createElement("div");
s.className = "slice";
s.style.width = sw + (SLICES > 1 ? 1 : 0) + "px";
s.style.height = HV + "px";
if (SLICES > 1) {
if (k === 0) s.style.borderRadius = `${RADIUS}px 0 0 ${RADIUS}px`;
else if (k === SLICES - 1) s.style.borderRadius = `0 ${RADIUS}px ${RADIUS}px 0`;
} else s.style.borderRadius = RADIUS + "px";
const img = document.createElement("img");
img.src = m.src;
img.style.width = ARC + "px";
img.style.height = HV + "px";
img.style.marginLeft = -k * sw + "px";
const shade = document.createElement("div");
shade.className = "shade";
s.appendChild(img);
s.appendChild(shade);
el.appendChild(s);
slices.push({ el: s, shade, dphi: (k - (SLICES - 1) / 2) * dAng, sw });
}
world.appendChild(el);
cards.push({ el, slices, i });
}
// position along the helix in slots (continuous); one loop = N slots
function progress(t) {
const u = frac(t) * N,
k = Math.floor(u),
g = u - k;
if (MOTION === "flow") return u;
const move = MOTION === "pulse" ? PULSE : 1; // fraction of each step spent moving
return k + ease(Math.min(1, g / move));
}
function renderAt(t) {
const adv = progress(t) * (DOWN ? 1 : -1);
for (const c of cards) {
const u = (((c.i + adv) % N) + N) % N; // 0..N, wraps at the helix ends (both outside the frame)
const phi0 = (u - N / 2) * STEP,
y0 = ((u - N / 2) * HT) / N;
const r = R * (1 - TAPER * (u / N));
for (const s of c.slices) {
const phi = phi0 + s.dphi,
rad = (phi * Math.PI) / 180;
const y = y0 + ((s.dphi / STEP) * HT) / N; // follow the slope within the card
s.el.style.transform = `rotateY(${phi}deg) translate3d(${-s.sw / 2}px,${y - HV / 2}px,${r}px) translate(0,${(-s.sw / 2) * Math.tan((SKEW * Math.PI) / 180)}px) skewY(${SKEW}deg)`;
s.shade.style.opacity = BFADE * Math.min(1, (1 - Math.cos(rad)) / 1.17); // full fade from ~100deg (ref back plateaus 0.42-0.45x by phi~100)
}
}
}
// one paused linear tween drives t; every frame is recomputed from t alone (seek-safe)
const state = { t: 0 };
const tl = gsap.timeline({ paused: true });
tl.to(state, { t: 1, duration: DUR, ease: "none", onUpdate: () => renderAt(state.t) }, 0);
renderAt(0);
window.__timelines = window.__timelines || {};
window.__timelines["loop-spiralstream"] = tl;
})();
</script>
</body>
</html>
```
</Accordion>
{/* hf:generated-footer */}
Tagged `loop` `images` `showcase` `gallery` `spiralstream` `3d`.
Created by Miao Yang.
## Related topics
- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)