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CSS

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HTML 

              
                <div class="css3d" id="css3d">
  <div class="youtube-wrapper">
    <div class="iframe-wrapper">
    <iframe width="560" height="315" src="https://www.youtube.com/embed/KAvafLZZ7J0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
  </div>
  </div>
</div>

<p class="credit">
  This work uses a model created under the CC-BY-4.0 license. Original author: AnnPiskacov (https://sketchfab.com/AndreaPiskacova)
</p>

    <nav class="action-nav">
      <button class="button" id="zoom-button">画面に近づく</button>
      <button class="button" id="pull-button">元の位置に戻る</button>
    </nav>

<script async src="https://ga.jspm.io/npm:es-module-shims@1.5.1/dist/es-module-shims.js" crossorigin="anonymous"></script>
<script type="importmap">
  {
    "imports": {
      "three": "https://unpkg.com/three@0.152.0/build/three.module.js",
      "three/addons/": "https://unpkg.com/three@0.152.0/examples/jsm/"
    }
  }
</script>
!

CSS 

              
                body {
  color: #333;
  position: relative;
  width: 100vw;
  overflow: hidden;
}

p {
  margin: 0;
  padding: 0;
  line-height: 1.2;
}

iframe {
  overflow: auto;
}

.css3d {
  -webkit-perspective: 1000px;
  perspective: 1000px;
  opacity: 0
}
.iframe-wrapper {
  /* width: 1260px; */
  aspect-ratio: 16 / 9;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
  /* transform: scale(0.44); */
}

.iframe-wrapper iframe {
  /* width: 100%;
  height: 100%; */
}

.credit {
  position: absolute;
  bottom: 16px;
  left: 16px;
  color: #fff;
  font-size: 10px;
}
.action-nav {
  position: fixed;
  left: 24px;
  top: 24px;
  z-index: 100000;
}
.button {
  background-color: #eee;
  z-index: 10000;
  font-size: 18px;
  padding: 0.5em 2em;
  border-radius: 40px;
  color: #fff;
}
.button:hover {
  opacity: 0.8;
}
#zoom-button {
  background-color: #c24242;
}
#pull-button {
  background-color: #425cc2;
}

@media screen and (max-width: 767px) {
  .button {
    display: block;
    font-size: 11px;
  }
  #pull-button {
    margin-top: 16px;
  }
}
!

JS 

              
                import * as THREE from "three";
import { CSS3DRenderer, CSS3DObject } from 'three/addons/renderers/CSS3DRenderer.js';
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";

let camera, scene, renderer,scene2, cssrenderer,object,wsw,css3dobject;
let cameraPosition = new THREE.Vector3(1000, 500, 700);
let cameraPositionSp = new THREE.Vector3(1000, 500, 800);
let cameraTargetPosition = new THREE.Vector3(400, 600, -20);
let cameraTargetPositionSp = new THREE.Vector3(700, 600, 40);

init();
animate();

function init() {
	camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1.0, 4000);
	wsw = window.screen.width;
	if (wsw < 768) {
		camera.position.set(cameraPositionSp.x, cameraPositionSp.y, cameraPositionSp.z);
		camera.fov=60
	}
	else{
		camera.position.set(cameraPosition.x, cameraPosition.y, cameraPosition.z);
	}
	camera.rotation.set(0, THREE.MathUtils.degToRad(60), 0);

	scene = new THREE.Scene();
	scene.background = new THREE.Color(0xffffff);
	const light = new THREE.SpotLight(0xFFFFFF, 4, 2200, Math.PI / 4, 1, 0.5);
	light.position.set(0, 2200, 0);
	scene.add(light);

	scene2 = new THREE.Scene();

	const loader = new GLTFLoader();
	loader.load('https://anbitbeans.github.io/css3d//isometric_room/scene.gltf', (data) => {
		const gltf = data;
		object = gltf.scene;
		object.scale.set(620.0, 620, 620.0);
		object.position.set(0, 0, 0);
		object.rotation.y = THREE.MathUtils.degToRad(80); 
		scene.add(object);
	});

	const cssobj = document.getElementById("css3d");
	css3dobject = new CSS3DObject(cssobj);
	css3dobject.scale.set(1.04, 1.04, 1.0);
	css3dobject.position.set(-450, 603, -173);
	css3dobject.rotation.set(0, THREE.MathUtils.degToRad(80), 0);
	scene2.add(css3dobject);
    cssobj.style.opacity = '1';
  
	renderer = new THREE.WebGLRenderer();
	renderer.antialias = true;
	renderer.setPixelRatio((Math.min(window.devicePixelRatio, 2)));
	
	renderer.setSize(window.innerWidth, window.innerHeight);
	document.body.appendChild(renderer.domElement);

	cssrenderer = new CSS3DRenderer();
	cssrenderer.setSize(window.innerWidth, window.innerHeight);
	cssrenderer.domElement.style.position = 'absolute';
	cssrenderer.domElement.style.top = 0;
	document.body.appendChild(cssrenderer.domElement);

	window.addEventListener("DOMContentLoaded", onWindowResize);
	window.addEventListener("resize", onWindowResize);
	window.addEventListener("orientationchange", onWindowResize);

	document.getElementById("zoom-button").addEventListener("click", moveCamera);
	document.getElementById("pull-button").addEventListener("click", pullCamera);
}

function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize(window.innerWidth, window.innerHeight);
    cssrenderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
	requestAnimationFrame(animate);
	renderer.render(scene, camera);
	cssrenderer.render(scene2, camera);
}

function moveCamera() {
	const tl = gsap.timeline();
	wsw = window.screen.width;
	if (wsw < 768) {
		tl
		.to(camera.rotation, { duration: 3.0, y: THREE.MathUtils.degToRad(80) })
		.to(camera.position, { duration: 3.0, x: cameraTargetPositionSp.x, y: cameraTargetPositionSp.y,z: cameraTargetPositionSp.z,ease: "power4.out" }, "-=3.0");
	}
	else{
		tl
		.to(camera.rotation, { duration: 3.0, y: THREE.MathUtils.degToRad(80) })
		.to(camera.position, { duration: 3.0, x: cameraTargetPosition.x, y: cameraTargetPosition.y,z: cameraTargetPosition.z,ease: "power4.out"}, "-=3.0");
	}

 }

 function pullCamera() {
	const tl = gsap.timeline();

	wsw = window.screen.width;
	if (wsw < 768) {
		tl
		.to(camera.rotation, { duration: 3.0, y: THREE.MathUtils.degToRad(60),ease: "power4.out"})
		.to(camera.position, { duration: 3.0, x: cameraPositionSp.x, y: cameraPositionSp.y,z: cameraPositionSp.z,ease: "power4.out" }, "-=3.0");
	}
	else{
		tl
		.to(camera.rotation, { duration: 3.0, y: THREE.MathUtils.degToRad(60),ease: "power4.out"})
		.to(camera.position, { duration: 3.0, x: cameraPosition.x, y: cameraPosition.y,z: cameraPosition.z,ease: "power4.out" }, "-=3.0");
	}

 }
!
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