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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js ar - hit test</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 - hit test<br/>(Chrome Android 81+)
- </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';
- let container;
- let camera, scene, renderer;
- let controller;
- let reticle;
- let hitTestSource = null;
- let hitTestSourceRequested = false;
- init();
- function init() {
- 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 light = new THREE.HemisphereLight( 0xffffff, 0xbbbbff, 3 );
- light.position.set( 0.5, 1, 0.25 );
- scene.add( light );
- //
- 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: [ 'hit-test' ] } ) );
- //
- const geometry = new THREE.CylinderGeometry( 0.1, 0.1, 0.2, 32 ).translate( 0, 0.1, 0 );
- function onSelect() {
- if ( reticle.visible ) {
- const material = new THREE.MeshPhongMaterial( { color: 0xffffff * Math.random() } );
- const mesh = new THREE.Mesh( geometry, material );
- reticle.matrix.decompose( mesh.position, mesh.quaternion, mesh.scale );
- mesh.scale.y = Math.random() * 2 + 1;
- scene.add( mesh );
- }
- }
- controller = renderer.xr.getController( 0 );
- controller.addEventListener( 'select', onSelect );
- scene.add( controller );
- reticle = new THREE.Mesh(
- new THREE.RingGeometry( 0.15, 0.2, 32 ).rotateX( - Math.PI / 2 ),
- new THREE.MeshBasicMaterial()
- );
- reticle.matrixAutoUpdate = false;
- reticle.visible = false;
- scene.add( reticle );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function animate( timestamp, frame ) {
- if ( frame ) {
- const referenceSpace = renderer.xr.getReferenceSpace();
- const session = renderer.xr.getSession();
- if ( hitTestSourceRequested === false ) {
- session.requestReferenceSpace( 'viewer' ).then( function ( referenceSpace ) {
- session.requestHitTestSource( { space: referenceSpace } ).then( function ( source ) {
- hitTestSource = source;
- } );
- } );
- session.addEventListener( 'end', function () {
- hitTestSourceRequested = false;
- hitTestSource = null;
- } );
- hitTestSourceRequested = true;
- }
- if ( hitTestSource ) {
- const hitTestResults = frame.getHitTestResults( hitTestSource );
- if ( hitTestResults.length ) {
- const hit = hitTestResults[ 0 ];
- reticle.visible = true;
- reticle.matrix.fromArray( hit.getPose( referenceSpace ).transform.matrix );
- } else {
- reticle.visible = false;
- }
- }
- }
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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