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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js ar - camera access</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> ar - camera access<br/>
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { ARButton } from 'three/addons/webxr/ARButton.js';
- const clock = new THREE.Clock();
- let camera, scene, renderer;
- let cube;
- init();
- async function init() {
- const container = document.createElement( 'div' );
- document.body.appendChild( container );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 20 );
- const defaultLight = new THREE.HemisphereLight( 0xffffff, 0xbbbbff, 3 );
- defaultLight.position.set( 0.5, 1, 0.25 );
- scene.add( defaultLight );
- //
- renderer = new THREE.WebGLRenderer( { antialias: true, alpha: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- renderer.xr.enabled = true;
- container.appendChild( renderer.domElement );
- //
- document.body.appendChild( ARButton.createButton( renderer, { requiredFeatures: [ 'camera-access' ] } ) );
- //
- const boxGeometry = new THREE.BoxGeometry( 1, 1, 1 );
- const boxMaterial = new THREE.MeshStandardMaterial();
- cube = new THREE.Mesh( boxGeometry, boxMaterial );
- cube.position.z = -3;
- scene.add( cube );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function setCameraTexture() {
- if ( ! renderer.xr.getSession() ) {
- if ( cube.material.map ) {
- cube.material.map = null;
- cube.material.needsUpdate = true;
- }
- return;
- }
- const frame = renderer.xr.getFrame();
- const referenceSpace = renderer.xr.getReferenceSpace();
- if ( !frame || !referenceSpace ) return;
- const viewerPose = frame.getViewerPose( referenceSpace );
- if ( ! viewerPose ) return;
- const view = viewerPose.views.find( view => view.camera );
-
- const cameraTexture = renderer.xr.getCameraTexture( view.camera );
- if ( cube.material.map === cameraTexture ) return;
- cube.material.map = cameraTexture;
- cube.material.needsUpdate = true;
-
- }
- function animate() {
- const delta = clock.getDelta();
- setCameraTexture();
- cube.rotation.x += delta;
- cube.rotation.y += delta;
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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