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181 lines
4.0 KiB
181 lines
4.0 KiB
3 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js ar - hit test</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> ar - hit test<br/>(Chrome Android 81+)
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { ARButton } from 'three/addons/webxr/ARButton.js';
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let container;
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let camera, scene, renderer;
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let controller;
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let reticle;
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let hitTestSource = null;
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let hitTestSourceRequested = false;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 20 );
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const light = new THREE.HemisphereLight( 0xffffff, 0xbbbbff, 1 );
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light.position.set( 0.5, 1, 0.25 );
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scene.add( light );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true, alpha: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.xr.enabled = true;
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container.appendChild( renderer.domElement );
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//
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document.body.appendChild( ARButton.createButton( renderer, { requiredFeatures: [ 'hit-test' ] } ) );
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//
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const geometry = new THREE.CylinderGeometry( 0.1, 0.1, 0.2, 32 ).translate( 0, 0.1, 0 );
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function onSelect() {
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if ( reticle.visible ) {
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const material = new THREE.MeshPhongMaterial( { color: 0xffffff * Math.random() } );
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const mesh = new THREE.Mesh( geometry, material );
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reticle.matrix.decompose( mesh.position, mesh.quaternion, mesh.scale );
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mesh.scale.y = Math.random() * 2 + 1;
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scene.add( mesh );
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}
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}
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controller = renderer.xr.getController( 0 );
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controller.addEventListener( 'select', onSelect );
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scene.add( controller );
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reticle = new THREE.Mesh(
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new THREE.RingGeometry( 0.15, 0.2, 32 ).rotateX( - Math.PI / 2 ),
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new THREE.MeshBasicMaterial()
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);
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reticle.matrixAutoUpdate = false;
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reticle.visible = false;
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scene.add( reticle );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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//
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function animate() {
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renderer.setAnimationLoop( render );
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}
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function render( timestamp, frame ) {
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if ( frame ) {
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const referenceSpace = renderer.xr.getReferenceSpace();
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const session = renderer.xr.getSession();
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if ( hitTestSourceRequested === false ) {
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session.requestReferenceSpace( 'viewer' ).then( function ( referenceSpace ) {
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session.requestHitTestSource( { space: referenceSpace } ).then( function ( source ) {
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hitTestSource = source;
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} );
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} );
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session.addEventListener( 'end', function () {
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hitTestSourceRequested = false;
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hitTestSource = null;
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} );
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hitTestSourceRequested = true;
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}
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if ( hitTestSource ) {
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const hitTestResults = frame.getHitTestResults( hitTestSource );
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if ( hitTestResults.length ) {
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const hit = hitTestResults[ 0 ];
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reticle.visible = true;
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reticle.matrix.fromArray( hit.getPose( referenceSpace ).transform.matrix );
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} else {
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reticle.visible = false;
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}
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}
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}
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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