Three.js Scroll Waypoints

console.clear();
gsap.registerPlugin(Flip, ScrollTrigger);

let ctx, renderer, scene, camera, mesh, canvasEl;

/*
 makeGradientNoiseTexture() This becomes our texture for the cube.
*/
function makeGradientNoiseTexture() {
 const c = document.createElement("canvas");
 c.width = c.height = 256;
 const g = c.getContext("2d");

 g.fillStyle = (() => {
 const grd = g.createLinearGradient(0, 0, 230, 384);
 grd.addColorStop(0, "#fec5fb"); // color A
 grd.addColorStop(1, "#00bae2"); // color B
 return grd;
 })();
 g.fillRect(0, 0, 256, 256);

 // Subtle grain for texture.
 for (let i = 0; i < 4000; i++) {
 const x = Math.floor(gsap.utils.random(0, 256));
 const y = Math.floor(gsap.utils.random(0, 256));
 const a = gsap.utils.random(0.02, 0.1);
 g.fillStyle = `rgba(0,0,0,${a})`;
 g.fillRect(x, y, 3, 3);
 }

 const tex = new THREE.CanvasTexture(c);
 tex.colorSpace = THREE.SRGBColorSpace;
 tex.anisotropy = 4;
 return tex;
}

/*
 initThree(canvas)
 Sets up a very small Three.js scene that renders into the supplied canvas.
*/
function initThree(canvas) {
 renderer = new THREE.WebGLRenderer({ canvas, antialias: true, alpha: true });
 renderer.outputColorSpace = THREE.SRGBColorSpace;

 scene = new THREE.Scene();
 camera = new THREE.PerspectiveCamera(45, 1, 0.1, 100);
 camera.position.set(0, 0, 3);

 // Square cube with our gradient noise texture
 const mat = new THREE.MeshBasicMaterial({ map: makeGradientNoiseTexture() });
 mesh = new THREE.Mesh(new THREE.BoxGeometry(1, 1, 1), mat);
 scene.add(mesh);

 // Render on the GSAP ticker so ScrollTrigger timing stays in sync
 gsap.ticker.add(render);
 onResize();

 buildTimeline();
}

/*
 render() the scene.
*/
function render() {
 if (!renderer) return;
 renderer.render(scene, camera);
}

/*
 onResize()
*/
function onResize() {
 if (!renderer || !canvasEl) return;
 const r = canvasEl.getBoundingClientRect();
 const dpr = Math.min(window.devicePixelRatio || 1, 2);
 renderer.setPixelRatio(1);
 renderer.setSize(
 Math.max(1, r.width * dpr),
 Math.max(1, r.height * dpr),
 false
 );
 camera.aspect = (r.width || 1) / (r.height || 1);
 camera.updateProjectionMatrix();
}

/*
 buildTimeline()
 Flip moves the canvas between your marker targets
 while we rotate the cube in the same timeline.
*/
function buildTimeline() {
 ctx && ctx.revert(); // clean teardown for resizes
 ctx = gsap.context(() => {
 const s2 = Flip.getState(".second .marker");
 const s3 = Flip.getState(".third .marker");

 const tl = gsap.timeline({
 scrollTrigger: {
 start: 0,
 end: "max",
 scrub: 2
 }
 });

 // Hop to second marker and rotate the cube
 tl.add(Flip.fit(canvasEl, s2, { duration: 1, ease: "none" }), 0)
 .to(
 mesh.rotation,
 { x: `+=${Math.PI}`, y: `+=${Math.PI}`, duration: 1, ease: "none" },
 "<"
 )

 // A little breathing room between hops
 .addLabel("mid", "+=0.5")

 // Hop to third marker and rotate again
 .add(Flip.fit(canvasEl, s3, { duration: 1, ease: "none" }), "mid")
 .to(
 mesh.rotation,
 { x: `+=${Math.PI}`, y: `+=${Math.PI}`, duration: 1, ease: "none" },
 "<"
 );
 });
}

/*
 build()
 Creates the canvas in the starting container and kicks off the scene.
*/
function build() {
 ctx && ctx.revert();
 const start = document.querySelector(".container.initial");
 if (!canvasEl) {
 canvasEl = document.createElement("canvas");
 canvasEl.className = "box";
 start.appendChild(canvasEl);
 initThree(canvasEl);
 } else {
 buildTimeline();
 }
}

// Boot it up
build();

// Keep things laid out correctly when the layout changes
addEventListener("resize", () => {
 onResize();
 buildTimeline();
});

/* StyleGallery host styles: independent replacement for unavailable shared Pen CSS. */
:root{--color-just-black:#111522;--color-surface-white:#f7f3ec;--color-surface75:#cfccc6;--color-surface50:#898e9f;--color-surface25:#414859;--color-shockingly-green:#95efd2;--color-lt-green:#b5f4da;--color-pink:#fbadce;--color-purple:#897dff;--color-lilac:#b5a1ff;--color-orangey:#ffd28c;--color-blue:#75d8ed;--color-ui-gradient:linear-gradient(135deg,#fbadce,#897dff);--light:#f7f3ec;--dark:#111522;--mid:#898e9f}
*{box-sizing:border-box}body{background:#111522;color:#f7f3ec;font-family:system-ui,sans-serif;margin:0;min-height:100vh;width:100%}button,input{font:inherit}button,.button{background:#111522;border:1px solid #898e9f;border-radius:.55rem;color:#f7f3ec;cursor:pointer;padding:.65rem 1rem}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #95efd2;outline-offset:4px}h1,h2,h3,h4{line-height:1.15}h4{font-weight:500}code{font-family:ui-monospace,monospace}.heading-l{font-size:clamp(2rem,6vw,5rem)}.heading-text{font-size:clamp(1.5rem,4vw,3rem)}.box{background:#95efd2;border-radius:14px;height:clamp(38px,12vw,80px);width:clamp(38px,12vw,80px)}.green{background:#95efd2}.purple{background:#897dff}.orange{background:#ffd28c}.gradient-pink{background:linear-gradient(140deg,#fbadce,#fc7f8e)}.gradient-purple{background:linear-gradient(140deg,#b5a1ff,#537ff7)}.center{align-items:center;display:flex;justify-content:center}.text-center{text-align:center}.panel{min-height:100vh;width:100%}.flair:not(img){background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNDgiIGhlaWdodD0iMjQ4IiB2aWV3Qm94PSIwIDAgMjQ4IDI0OCI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJnIiB4Mj0iMSIgeTI9IjEiPjxzdG9wIHN0b3AtY29sb3I9IiNiNWExZmYiLz48c3RvcCBvZmZzZXQ9IjEiIHN0b3AtY29sb3I9IiM3NWQ4ZWQiLz48L2xpbmVhckdyYWRpZW50PjwvZGVmcz48ZyBmaWxsPSJ1cmwoI2cpIj48cGF0aCBkPSJNODcgMjBoNzR2NjdoNjd2NzRoLTY3djY3SDg3di02N0gyMFY4N2g2N1oiLz48L2c+PC9zdmc+");background-position:center;background-repeat:no-repeat;background-size:contain;height:80px;width:80px}.flair--3:not(img){background-image:url("data:image/svg+xml;base64,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")}.braces{font-size:1rem}img{max-width:100%}
/* External font programs are omitted; preserve readable fallback typography. */
body,button,input,h1,h2,h3,h4,p,span,div{font-family:inherit}body{font-family:system-ui,sans-serif}code,pre{font-family:ui-monospace,monospace}

window.__STYLEGALLERY_ASSETS__={};
console.clear();
gsap.registerPlugin(Flip, ScrollTrigger);
let ctx, renderer, scene, camera, mesh, canvasEl;
function makeGradientNoiseTexture() {
  const c = document.createElement("canvas");
  c.width = c.height = 256;
  const g = c.getContext("2d");
  g.fillStyle = (() => {
    const grd = g.createLinearGradient(0, 0, 230, 384);
    grd.addColorStop(0, "#fec5fb");
    grd.addColorStop(1, "#00bae2");
    return grd;
  })();
  g.fillRect(0, 0, 256, 256);
  for (let i = 0; i < 4e3; i++) {
    const x = Math.floor(gsap.utils.random(0, 256));
    const y = Math.floor(gsap.utils.random(0, 256));
    const a = gsap.utils.random(0.02, 0.1);
    g.fillStyle = `rgba(0,0,0,${a})`;
    g.fillRect(x, y, 3, 3);
  }
  const tex = new THREE.CanvasTexture(c);
  tex.colorSpace = THREE.SRGBColorSpace;
  tex.anisotropy = 4;
  return tex;
}
function initThree(canvas) {
  renderer = new THREE.WebGLRenderer({ canvas, antialias: true, alpha: true });
  renderer.outputColorSpace = THREE.SRGBColorSpace;
  scene = new THREE.Scene();
  camera = new THREE.PerspectiveCamera(45, 1, 0.1, 100);
  camera.position.set(0, 0, 3);
  const mat = new THREE.MeshBasicMaterial({ map: makeGradientNoiseTexture() });
  mesh = new THREE.Mesh(new THREE.BoxGeometry(1, 1, 1), mat);
  scene.add(mesh);
  gsap.ticker.add(render);
  onResize();
  buildTimeline();
}
function render() {
  if (!renderer) return;
  renderer.render(scene, camera);
}
function onResize() {
  if (!renderer || !canvasEl) return;
  const r = canvasEl.getBoundingClientRect();
  const dpr = Math.min(window.devicePixelRatio || 1, 2);
  renderer.setPixelRatio(1);
  renderer.setSize(
    Math.max(1, r.width * dpr),
    Math.max(1, r.height * dpr),
    false
  );
  camera.aspect = (r.width || 1) / (r.height || 1);
  camera.updateProjectionMatrix();
}
function buildTimeline() {
  ctx && ctx.revert();
  ctx = gsap.context(() => {
    const s2 = Flip.getState(".second .marker");
    const s3 = Flip.getState(".third .marker");
    const tl = gsap.timeline({
      scrollTrigger: {
        start: 0,
        end: "max",
        scrub: 2
      }
    });
    tl.add(Flip.fit(canvasEl, s2, { duration: 1, ease: "none" }), 0).to(
      mesh.rotation,
      { x: `+=${Math.PI}`, y: `+=${Math.PI}`, duration: 1, ease: "none" },
      "<"
    ).addLabel("mid", "+=0.5").add(Flip.fit(canvasEl, s3, { duration: 1, ease: "none" }), "mid").to(
      mesh.rotation,
      { x: `+=${Math.PI}`, y: `+=${Math.PI}`, duration: 1, ease: "none" },
      "<"
    );
  });
}
function build() {
  ctx && ctx.revert();
  const start = document.querySelector(".container.initial");
  if (!canvasEl) {
    canvasEl = document.createElement("canvas");
    canvasEl.className = "box";
    start.appendChild(canvasEl);
    initThree(canvasEl);
  } else {
    buildTimeline();
  }
}
build();
addEventListener("resize", () => {
  onResize();
  buildTimeline();
});

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GSAP 3.15.0
Copyright 2026, GreenSock. All rights reserved.
Subject to the Standard No Charge License: https://gsap.com/standard-license.
The full notice in each original GSAP library file is preserved.

The MIT License

Copyright © 2010-2023 three.js authors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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