> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes.heygen.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Whip Pan Cut

> A full-frame whip pan: scene A whips off laterally with capped directional motion blur while scene B enters in the same direction at matched velocity, on a speed-ramp profile with a decelerating catch. Both scenes ride one strip, so seam velocity is exact by construction. Callers fill the named before/after slot panels; token-styled defaults render when a slot is left empty.

export const InstallCommand = ({command}) => {
  const [copied, setCopied] = React.useState(false);
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(command);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = command;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {command}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

<iframe className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800" title="whip-pan-cut preview" loading="lazy" srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/components/whip-pan-cut.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/components/whip-pan-cut.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add whip-pan-cut" />

That writes one file: `compositions/components/whip-pan-cut.html`.

## Paste it into your composition

Open `compositions/components/whip-pan-cut.html` and copy what is inside into your own composition.

A component has no size or duration of its own. It takes both from the composition
you paste it into.

## 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                                                                         |
| ----------- | ------- | ------------------------- | ------------------------------------------------------------------------------------ |
| `direction` | `left`  | `left`, `right`           | Shared travel direction for the outgoing and incoming scenes.                        |
| `whip_at`   | `0.25`  | 0s to 8s, step 0.05s      | Seconds after mount start when the whip begins.                                      |
| `accent`    | `green` | `green`, `blue`, `violet` | Seam hairline and default after art tint.                                            |
| `exit`      | `none`  | `none`, `fade`, `up`      | Optional departure of the landed scene. Default none: it rests until the frame cuts. |

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 theme={null}
<div
  data-composition-id="whip-pan-cut"
  data-composition-src="compositions/components/whip-pan-cut.html"
  data-variable-values='{"direction":"left","whip_at":0.25,"accent":"green","exit":"none"}'
></div>
```

## Source

<Accordion title={`whip-pan-cut.html`}>
  ```html theme={null}
  <!doctype html>
  <!--
    whip-pan-cut: HyperFrames video primitive (transitions / bridge)

    Concept: the louder sibling of cut-the-curve. Scene A whips off laterally
    with directional motion blur while scene B enters in the same direction at
    matched velocity, on a speed-ramp profile (accelerate, fast middle,
    decelerating catch). Two full-bleed content slots (the before-after-wipe
    convention) with token-styled defaults.

    Wave K, unit K6. Velocity matching is structural: both scenes ride ONE
    strip (B docked one frame-width beyond A along the travel direction) and
    the strip runs a single power3.inOut tween, so the seam velocity is exact
    by construction and the profile is fast-middle with a decelerating catch.

    Motion blur follows the motion-blur-streak recipe: a directional SVG
    feGaussianBlur (stdDeviation "X 0", horizontal axis only) applied to the
    mover (the strip carries both transform and filter; nothing else is
    filtered, and there is no 3D on the strip for the filter to flatten). The
    blur envelope is CAPPED at 16px and peaks exactly at mid-whip (peak
    velocity), resolving to 0 at both ends: power3.in up over the first half,
    power3.out down over the second, mirroring the strip's inOut velocity. The
    proxy value is re-written on every seek via onUpdate and seeded at setup so
    frame 0 renders sharp.

    A hairline accent seam rides the boundary between the two scenes; it is
    visible only while the whip runs, so it reads as the frame edge screaming
    past rather than persistent chrome.

    Slots (see README.md for a worked example):
      - [data-slot="before"]: scene A, on stage at mount. Replace the children
        of this element in your installed copy. Default: a muted token
        wireframe.
      - [data-slot="after"]:  scene B, whipping in. Same mechanism. Default: a
        brand-tinted version of the wireframe.
      Direct img/video children of a slot are sized to cover the panel.

    Variables (declared in data-composition-variables below):
      - direction (left | right, default left): shared travel direction for
        both scenes.
      - whip_at (number, seconds, default 0.25): when the whip starts, relative
        to mount start. Clamped so the whip always completes inside the clip.
      - accent (green | blue | violet, default green): seam hairline and the
        default after art tint. green maps to --brand, blue to --accent,
        violet to --accent-2.
      - exit (none | fade | up, default none): optional departure of the landed
        scene B. Enabling it reserves a short tail window (min(0.35s, 25% of
        D)) after B lands.

    Envelope (transition profile, cut-the-curve precedent; the catch may still
    be decelerating when a short clip window ends):
      LEAD  = whip_at (scene A rests, readable)
      WHIP  = 0.55s, power3.inOut, one frame-width of travel
      REST  = elastic remainder, dead still on B
      EXIT  = 0 when exit is none, else min(0.35s, 25% of D)
      If D < LEAD + WHIP + EXIT, LEAD and WHIP scale down together.

    Sync point: whip-cut at LEAD + WHIP/2 (peak velocity, 0.53s at defaults).

    Sound cue: dispatches a bubbling `hf:sfx` CustomEvent with id "whip-cut"
    at peak velocity. This primitive never plays audio.

    Interruptible springs law (L1): the whip is a single owned tween on one
    strip; a host redirect retargets the same transform channel and GSAP's
    default overwrite preserves current velocity-position state at the
    interruption frame (no snap-to-zero).

    Mount contract: MOUNTABLE SUB-COMPOSITION. The runtime clones only
    <template> contents; #root fills the host box (inset:0, container-type:
    size), has no data-width/data-height, and registers one paused timeline
    under the literal "whip-pan-cut" key (mount flattening strips
    data-composition-id from the live root). Variables come from
    window.__hyperframes.getVariables().
  -->
  <html
    lang="en"
    data-composition-id="whip-pan-cut"
    data-composition-duration="1.2"
    data-composition-variables='[
      { "id": "direction", "type": "enum", "role": "motion", "label": "Direction", "description": "Shared travel direction for the outgoing and incoming scenes.", "default": "left", "options": [{ "value": "left", "label": "Left" }, { "value": "right", "label": "Right" }] },
      { "id": "whip_at", "type": "number", "role": "timing", "label": "Whip start", "description": "Seconds after mount start when the whip begins.", "default": 0.25, "min": 0, "max": 8, "step": 0.05, "unit": "s" },
      { "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Seam hairline and default after art tint.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
      { "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure of the landed scene. Default none: it rests until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
    ]'
  >
    <head>
      <meta charset="UTF-8" />
      <title>Whip Pan Cut</title>
    </head>
    <body>
      <template>
        <div id="root" data-composition-id="whip-pan-cut" data-duration="1.2" data-fps="30">
          <style>
            *,
            *::before,
            *::after {
              box-sizing: border-box;
            }

            /* Root fills the host-owned box. Internal measurements use cqw/cqh
               and every painted color comes from a contract token. */
            #root {
              position: absolute;
              inset: 0;
              container-type: size;
              isolation: isolate;
              overflow: hidden;
              background: var(--bg, #07111f);
              color: var(--fg, #f8fafc);
              font-family: var(--font-body, Inter, system-ui, sans-serif);
            }

            .wpc-clip,
            .wpc-strip,
            .wpc-panel,
            .wpc-slot {
              position: absolute;
              inset: 0;
              width: 100%;
              height: 100%;
            }

            .wpc-clip {
              overflow: hidden;
            }

            /* The strip is the ONE mover: it carries both scenes, the transform
               tween, and the directional blur filter. No 3D lives on it, so the
               filter has nothing to flatten. */
            .wpc-strip {
              filter: url("#wpc-blur");
              will-change: transform, filter;
            }

            .wpc-panel {
              overflow: hidden;
            }

            /* Scene B docks one frame-width beyond scene A along the travel
               direction, so the pan crosses one continuous surface. */
            #root[data-direction="left"] .wpc-after {
              left: 100%;
            }

            #root[data-direction="right"] .wpc-after {
              left: -100%;
            }

            /* The seam hairline rides the boundary between the two scenes and
               is timeline-owned: visible only while the whip runs. */
            .wpc-seam {
              position: absolute;
              z-index: 3;
              top: 0;
              bottom: 0;
              width: 0.35cqw;
              transform: translateX(-50%);
              background: var(--wpc-accent, #22c55e);
              pointer-events: none;
            }

            #root[data-direction="left"] .wpc-seam {
              left: 100%;
            }

            #root[data-direction="right"] .wpc-seam {
              left: 0;
            }

            /* Caller-supplied media covers its panel edge to edge. */
            .wpc-slot > img,
            .wpc-slot > video {
              position: absolute;
              inset: 0;
              width: 100%;
              height: 100%;
              object-fit: cover;
            }

            /* Token-styled default slot content: a wireframe card that reads
               muted on the before layer and brand-tinted on the after layer.
               Callers replacing slot children never see any of this. */
            .wpc-default {
              position: absolute;
              inset: 0;
              display: grid;
              place-items: center;
            }

            .wpc-before .wpc-default {
              background:
                linear-gradient(
                    color-mix(in srgb, var(--border, #334155) 34%, transparent) 0.12cqw,
                    transparent 0.12cqw
                  )
                  0 0 / 5cqw 5cqw,
                linear-gradient(
                    90deg,
                    color-mix(in srgb, var(--border, #334155) 34%, transparent) 0.12cqw,
                    transparent 0.12cqw
                  )
                  0 0 / 5cqw 5cqw,
                var(--surface, #172033);
            }

            .wpc-after .wpc-default {
              background: linear-gradient(
                135deg,
                color-mix(in srgb, var(--brand, #22c55e) 32%, var(--surface, #172033)) 0%,
                var(--surface, #172033) 58%,
                color-mix(in srgb, var(--wpc-accent, #22c55e) 22%, var(--surface, #172033)) 100%
              );
            }

            .wpc-card {
              width: 56cqw;
              height: 56cqh;
              padding: var(--space-3, 4cqh) var(--space-3, 4cqw);
              border: 0.16cqw solid var(--border, #334155);
              border-radius: var(--radius, 2.4cqmin);
              background: color-mix(in srgb, var(--surface, #172033) 88%, var(--bg, #07111f));
              box-shadow: 0 2cqh 5cqw color-mix(in srgb, var(--bg, #07111f) 45%, transparent);
            }

            .wpc-after .wpc-card {
              border-color: color-mix(
                in srgb,
                var(--wpc-accent, #22c55e) 52%,
                var(--border, #334155)
              );
              background: color-mix(in srgb, var(--surface, #172033) 86%, var(--brand, #22c55e));
            }

            .wpc-bar {
              width: 34%;
              height: 4.4cqh;
              margin-bottom: var(--space-3, 4cqh);
              border-radius: 1.2cqh;
              background: var(--muted, #94a3b8);
              opacity: 0.5;
            }

            .wpc-after .wpc-bar {
              background: var(--wpc-accent, #22c55e);
              opacity: 0.92;
            }

            .wpc-line {
              height: 2.4cqh;
              margin-bottom: var(--space-2, 2.6cqh);
              border-radius: 1.2cqh;
              background: var(--muted, #94a3b8);
              opacity: 0.4;
            }

            .wpc-line:nth-of-type(2) {
              width: 92%;
            }

            .wpc-line:nth-of-type(3) {
              width: 68%;
            }

            .wpc-line:nth-of-type(4) {
              width: 44%;
            }

            .wpc-after .wpc-line {
              background: color-mix(in srgb, var(--brand, #22c55e) 70%, var(--fg, #f8fafc));
              opacity: 0.75;
            }
          </style>

          <div
            id="whip-pan-cut-clip"
            class="wpc-clip clip"
            data-start="0"
            data-duration="1.2"
            data-track-index="0"
          >
            <svg width="0" height="0" aria-hidden="true" style="position: absolute">
              <defs>
                <filter id="wpc-blur" x="-50%" y="-20%" width="200%" height="140%">
                  <feGaussianBlur class="wpc-blur-node" in="SourceGraphic" stdDeviation="0 0" />
                </filter>
              </defs>
            </svg>

            <div class="wpc-strip">
              <section class="wpc-panel wpc-before" aria-label="Outgoing scene">
                <div class="wpc-slot" data-slot="before">
                  <!-- SLOT "before": replace the children of this element with
                       your own content (img, video, or HTML). -->
                  <div class="wpc-default" aria-hidden="true">
                    <div class="wpc-card">
                      <div class="wpc-bar"></div>
                      <div class="wpc-line"></div>
                      <div class="wpc-line"></div>
                      <div class="wpc-line"></div>
                    </div>
                  </div>
                </div>
              </section>

              <section class="wpc-panel wpc-after" aria-label="Incoming scene">
                <div class="wpc-slot" data-slot="after">
                  <!-- SLOT "after": replace the children of this element with
                       your own content (img, video, or HTML). -->
                  <div class="wpc-default" aria-hidden="true">
                    <div class="wpc-card">
                      <div class="wpc-bar"></div>
                      <div class="wpc-line"></div>
                      <div class="wpc-line"></div>
                      <div class="wpc-line"></div>
                    </div>
                  </div>
                </div>
              </section>

              <div class="wpc-seam" aria-hidden="true"></div>
            </div>
          </div>

          <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
          <script>
            (function () {
              "use strict";

              var root = document.getElementById("root");
              // Literal id: mount flattening strips data-composition-id from the
              // live root before this timeline registers.
              var compositionId = "whip-pan-cut";
              var strip = root.querySelector(".wpc-strip");
              var seam = root.querySelector(".wpc-seam");
              var blurNode = root.querySelector(".wpc-blur-node");

              var vars =
                window.__hyperframes && window.__hyperframes.getVariables
                  ? window.__hyperframes.getVariables()
                  : {};

              var direction = vars.direction === "right" ? "right" : "left";
              var rawWhipAt = vars.whip_at == null ? 0.25 : Number(vars.whip_at);
              var whipAt = Number.isFinite(rawWhipAt) ? Math.max(0, Math.min(8, rawWhipAt)) : 0.25;
              // Each enum choice routes to a DIFFERENT contract token so the
              // variable stays meaningful under a theme.
              var accentColors = {
                green: "var(--brand, #22c55e)",
                blue: "var(--accent, #38bdf8)",
                violet: "var(--accent-2, #c5a3ff)",
              };
              var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
                ? vars.accent
                : "green";
              // The bundler mirrors composition variables as scoped CSS custom
              // props, so this unit's own accent variable can shadow the
              // contract --accent token inside the subtree ("blue" is a valid
              // CSS color and would render pure blue). When the shadow is
              // present, fall back to the literal contract value.
              var computedAccent = getComputedStyle(root).getPropertyValue("--accent").trim();
              if (
                computedAccent === "green" ||
                computedAccent === "blue" ||
                computedAccent === "violet"
              ) {
                accentColors.blue = "#38bdf8";
              }
              // INVARIANT: only none | fade | up reaches the timeline.
              var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";

              root.dataset.direction = direction;
              root.style.setProperty("--wpc-accent", accentColors[accent]);

              // Travel measured in px ONCE at mount (cq units inside tweened
              // transform values are a seek trap). One frame-width lands scene
              // B exactly where scene A stood.
              var travel = root.clientWidth || 1920;
              var sign = direction === "left" ? -1 : 1;

              // RETIME RANGE: 0.6s to 3s. LEAD and WHIP scale together only when
              // D is too short. REST absorbs any remainder; this is a transition
              // profile (cut-the-curve precedent), so a short clip window may
              // end while the catch is still decelerating. Never timeScale().
              var WHIP_DURATION_BASE = 0.55;
              var duration = Math.max(0.001, parseFloat(root.dataset.duration || "1.2"));
              var EXIT = exit === "none" ? 0 : Math.min(0.35, duration * 0.25);
              var scale =
                duration - EXIT < whipAt + WHIP_DURATION_BASE
                  ? (duration - EXIT) / (whipAt + WHIP_DURATION_BASE)
                  : 1;
              var WHIP_AT = whipAt * scale;
              var WHIP_DURATION = WHIP_DURATION_BASE * scale;
              var WHIP_END = WHIP_AT + WHIP_DURATION;
              var CUT_AT = WHIP_AT + WHIP_DURATION / 2;
              var OUT_START = duration - EXIT;

              // Blur cap per the motion-blur-streak recipe: peak stdDeviation
              // stays well under the 30px readability ceiling.
              var PEAK_BLUR = 16;
              var blurProxy = { v: 0 };
              function writeBlur() {
                blurNode.setAttribute("stdDeviation", blurProxy.v + " 0");
              }
              // Seed frame 0 so a seek to t=0 renders sharp, not a stale blur.
              writeBlur();

              function fireSfx(id, t) {
                root.dispatchEvent(
                  new CustomEvent("hf:sfx", { detail: { id: id, t: t }, bubbles: true }),
                );
              }

              // Explicit both-endpoints state makes tl.seek(0) deterministic.
              gsap.set(strip, { x: 0, y: 0, opacity: 1 });
              gsap.set(seam, { autoAlpha: 0 });

              var tl = gsap.timeline({ paused: true });

              // WHIP: one strip, one speed-ramp tween. Both scenes share the
              // transform, so seam velocity is matched by construction.
              tl.fromTo(
                strip,
                { x: 0 },
                { x: sign * travel, duration: WHIP_DURATION, ease: "power3.inOut" },
                WHIP_AT,
              );

              // Blur envelope: peaks at mid-whip (peak velocity), zero at both
              // ends. power3.in up / power3.out down mirrors the inOut ramp.
              tl.to(
                blurProxy,
                { v: PEAK_BLUR, duration: WHIP_DURATION / 2, ease: "power3.in", onUpdate: writeBlur },
                WHIP_AT,
              );
              tl.to(
                blurProxy,
                { v: 0, duration: WHIP_DURATION / 2, ease: "power3.out", onUpdate: writeBlur },
                WHIP_AT + WHIP_DURATION / 2,
              );

              // Seam hairline: alive only while the whip runs.
              tl.fromTo(
                seam,
                { autoAlpha: 0 },
                {
                  autoAlpha: 1,
                  duration: Math.min(0.1 * scale, WHIP_DURATION),
                  ease: "power1.out",
                  immediateRender: false,
                },
                WHIP_AT,
              );
              tl.to(
                seam,
                { autoAlpha: 0, duration: 0.15 * scale, ease: "power1.in" },
                Math.max(WHIP_AT, WHIP_END - 0.15 * scale),
              );

              tl.call(
                function () {
                  fireSfx("whip-cut", CUT_AT);
                },
                [],
                CUT_AT,
              );

              // REST: dead still on scene B until the frame cuts.

              // EXIT: only when the exit variable asks for one; exit none holds
              // the landed scene (frame roots own transitions).
              if (exit !== "none") {
                tl.to(strip, { opacity: 0, duration: EXIT, ease: "power2.in" }, OUT_START);
                if (exit === "up") {
                  tl.to(strip, { y: "-6cqh", duration: EXIT, ease: "power2.in" }, OUT_START);
                }
              }

              tl.seek(0);

              window.__timelines = window.__timelines || {};
              window.__timelines[compositionId] = tl;
            })();
          </script>
        </div>
      </template>
    </body>
  </html>
  ```
</Accordion>

Tagged `transition` `whip-pan` `motion-blur` `velocity-match` `speed-ramp` `bridge` `slots`.

## Related topics

* [Browse the complete Catalog](/catalog)
* [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
* [Build a richer composition](/go-further)


## Related topics

- [Whip Pan](/catalog/blocks/whip-pan.md)
- [Transitions](/prompting/transitions.md)
- [Cut the Curve](/catalog/components/cut-the-curve.md)
