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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 - paint</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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+ <!-- WebXR Device API (For Chrome M76+), expires 12/04/2019 -->
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+ <meta http-equiv="origin-trial" content="Aq9LklhCLNUveuCr7QTpGpqwCPG817cYHdVyQuJPOZYk47iRB390lUKa5edVmgS1pZSl8HPspElEC/91Fz55dwIAAABTeyJvcmlnaW4iOiJodHRwczovL3RocmVlanMub3JnOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZU03NiIsImV4cGlyeSI6MTU3NTQxNzU5OX0=">
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+ </head>
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+ <body>
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+
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+ <div id="info">
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+ <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> ar - paint
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+ </div>
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+
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+ <script type="module">
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+
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+ import * as THREE from '../build/three.module.js';
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+ import { TubePainter } from './jsm/misc/TubePainter.js';
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+ import { ARButton } from './jsm/webxr/ARButton.js';
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+
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+ var container;
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+ var camera, scene, renderer;
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+ var controller, painter;
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+
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+ var up = new THREE.Vector3( 0, 1, 0 );
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+
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+ init();
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+ animate();
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+
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+ function init() {
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+
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+ container = document.createElement( 'div' );
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+ document.body.appendChild( container );
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+
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+ var info = document.createElement( 'div' );
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+ info.style.position = 'absolute';
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+ info.style.top = '10px';
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+ info.style.width = '100%';
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+ info.style.textAlign = 'center';
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+ info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> ar - paint<br/>Enable chrome://flags/#webxr-ar-module<br/>(Chrome 80+)';
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+ container.appendChild( info );
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+
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+ scene = new THREE.Scene();
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+
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+ camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 20 );
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+
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+ //
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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.vr.enabled = true;
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+ container.appendChild( renderer.domElement );
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+
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+ //
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+
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+ document.body.appendChild( ARButton.createButton( renderer ) );
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+
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+ // model
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+
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+ var light = new THREE.HemisphereLight( 0xffffff, 0xbbbbff, 1 );
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+ light.position.set( 0, 1, 0 );
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+ scene.add( light );
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+
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+ //
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+
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+ painter = new TubePainter();
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+ painter.setSize( 0.4 );
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+ painter.mesh.material.side = THREE.DoubleSide;
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+ scene.add( painter.mesh );
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+
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+ //
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+
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+ function onSelectStart() {
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+
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+ this.userData.isSelecting = true;
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+ this.userData.skipFrames = 2;
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+
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+ }
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+
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+ function onSelectEnd() {
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+
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+ this.userData.isSelecting = false;
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+
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+ }
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+
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+ controller = renderer.vr.getController( 0 );
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+ controller.addEventListener( 'selectstart', onSelectStart );
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+ controller.addEventListener( 'selectend', onSelectEnd );
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+ controller.userData.points = [ new THREE.Vector3(), new THREE.Vector3() ];
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+ controller.userData.matrices = [ new THREE.Matrix4(), new THREE.Matrix4() ];
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+ controller.userData.skipFrames = 0;
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+ scene.add( controller );
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+
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+ //
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+
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ //
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+
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+ function handleController( controller ) {
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+
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+ var userData = controller.userData;
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+
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+ var point1 = userData.points[ 0 ];
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+ var point2 = userData.points[ 1 ];
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+
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+ var matrix1 = userData.matrices[ 0 ];
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+ var matrix2 = userData.matrices[ 1 ];
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+
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+ point1.set( 0, 0, - 0.2 ).applyMatrix4( controller.matrixWorld );
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+ matrix1.lookAt( point2, point1, up );
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+
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+ if ( userData.isSelecting === true ) {
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+
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+ if ( userData.skipFrames >= 0 ) {
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+
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+ // TODO(mrdoob) Revisit this
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+
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+ userData.skipFrames --;
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+
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+ } else {
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+
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+ var count = painter.mesh.geometry.drawRange.count;
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+
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+ painter.stroke( point1, point2, matrix1, matrix2 );
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+
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+ painter.updateGeometry( count, painter.mesh.geometry.drawRange.count );
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+
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+ }
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+
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+ }
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+
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+ point2.copy( point1 );
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+ matrix2.copy( matrix1 );
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+
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+ }
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+
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+ function animate() {
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+
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+ renderer.setAnimationLoop( render );
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+
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+ }
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+
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+ function render() {
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+
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+ handleController( controller );
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+
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+ renderer.render( scene, camera );
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+
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+ }
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+
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+ </script>
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+ </body>
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+</html>
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Mr.doob