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309 lines
7.3 KiB
HTML
309 lines
7.3 KiB
HTML
<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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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=yes">
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<title>Three.js - WebXR - Point to Select w/Move</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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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/": "../../examples/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 { VRButton } from 'three/addons/webxr/VRButton.js';
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function main() {
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const canvas = document.querySelector( '#c' );
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const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
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renderer.xr.enabled = true;
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document.body.appendChild( VRButton.createButton( renderer ) );
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const fov = 75;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 50;
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const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
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camera.position.set( 0, 1.6, 0 );
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const scene = new THREE.Scene();
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// object to put pickable objects on so we can easily
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// separate them from non-pickable objects
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const pickRoot = new THREE.Object3D();
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scene.add( pickRoot );
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{
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const loader = new THREE.CubeTextureLoader();
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const texture = loader.load( [
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'resources/images/grid-1024.png',
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'resources/images/grid-1024.png',
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'resources/images/grid-1024.png',
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'resources/images/grid-1024.png',
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'resources/images/grid-1024.png',
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'resources/images/grid-1024.png',
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] );
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scene.background = texture;
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}
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{
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const color = 0xFFFFFF;
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const intensity = 3;
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const light = new THREE.DirectionalLight( color, intensity );
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light.position.set( - 1, 2, 4 );
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scene.add( light );
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}
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const boxWidth = 1;
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const boxHeight = 1;
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const boxDepth = 1;
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const boxGeometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
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const sphereRadius = 0.5;
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const sphereGeometry = new THREE.SphereGeometry( sphereRadius );
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function makeInstance( geometry, color, x ) {
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const material = new THREE.MeshPhongMaterial( { color } );
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const cube = new THREE.Mesh( geometry, material );
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pickRoot.add( cube );
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cube.position.x = x;
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cube.position.y = 1.6;
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cube.position.z = - 2;
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return cube;
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}
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const meshToMeshMap = new Map();
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[
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{ x: 0, boxColor: 0x44aa88, sphereColor: 0xFF4444, },
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{ x: 2, boxColor: 0x8844aa, sphereColor: 0x44FF44, },
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{ x: - 2, boxColor: 0xaa8844, sphereColor: 0x4444FF, },
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].forEach( ( info ) => {
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const { x, boxColor, sphereColor } = info;
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const sphere = makeInstance( sphereGeometry, sphereColor, x );
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const box = makeInstance( boxGeometry, boxColor, x );
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// hide the sphere
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sphere.visible = false;
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// map the sphere to the box
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meshToMeshMap.set( box, sphere );
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// map the box to the sphere
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meshToMeshMap.set( sphere, box );
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} );
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class ControllerPickHelper extends THREE.EventDispatcher {
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constructor( scene ) {
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super();
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this.raycaster = new THREE.Raycaster();
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this.objectToColorMap = new Map();
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this.controllerToObjectMap = new Map();
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const pointerGeometry = new THREE.BufferGeometry().setFromPoints( [
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new THREE.Vector3( 0, 0, 0 ),
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new THREE.Vector3( 0, 0, - 1 ),
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] );
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this.controllers = [];
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const selectListener = ( event ) => {
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const controller = event.target;
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const selectedObject = this.controllerToObjectMap.get( event.target );
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if ( selectedObject ) {
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this.dispatchEvent( { type: event.type, controller, selectedObject } );
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}
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};
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const endListener = ( event ) => {
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const controller = event.target;
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this.dispatchEvent( { type: event.type, controller } );
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};
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for ( let i = 0; i < 2; ++ i ) {
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const controller = renderer.xr.getController( i );
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controller.addEventListener( 'select', selectListener );
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controller.addEventListener( 'selectstart', selectListener );
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controller.addEventListener( 'selectend', endListener );
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scene.add( controller );
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const line = new THREE.Line( pointerGeometry );
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line.scale.z = 5;
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controller.add( line );
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this.controllers.push( { controller, line } );
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}
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}
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reset() {
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// restore the colors
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this.objectToColorMap.forEach( ( color, object ) => {
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object.material.emissive.setHex( color );
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} );
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this.objectToColorMap.clear();
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this.controllerToObjectMap.clear();
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}
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update( pickablesParent, time ) {
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this.reset();
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for ( const { controller, line } of this.controllers ) {
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// cast a ray through the from the controller
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this.raycaster.setFromXRController( controller );
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// get the list of objects the ray intersected
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const intersections = this.raycaster.intersectObjects( pickablesParent.children );
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if ( intersections.length ) {
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const intersection = intersections[ 0 ];
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// make the line touch the object
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line.scale.z = intersection.distance;
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// pick the first object. It's the closest one
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const pickedObject = intersection.object;
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// save which object this controller picked
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this.controllerToObjectMap.set( controller, pickedObject );
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// highlight the object if we haven't already
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if ( this.objectToColorMap.get( pickedObject ) === undefined ) {
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// save its color
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this.objectToColorMap.set( pickedObject, pickedObject.material.emissive.getHex() );
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// set its emissive color to flashing red/yellow
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pickedObject.material.emissive.setHex( ( time * 8 ) % 2 > 1 ? 0xFF2000 : 0xFF0000 );
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}
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} else {
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line.scale.z = 5;
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}
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}
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}
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}
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const controllerToSelection = new Map();
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const pickHelper = new ControllerPickHelper( scene );
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pickHelper.addEventListener( 'selectstart', ( event ) => {
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const { controller, selectedObject } = event;
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const existingSelection = controllerToSelection.get( controller );
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if ( ! existingSelection ) {
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controllerToSelection.set( controller, {
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object: selectedObject,
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parent: selectedObject.parent,
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} );
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controller.attach( selectedObject );
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}
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} );
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pickHelper.addEventListener( 'selectend', ( event ) => {
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const { controller } = event;
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const selection = controllerToSelection.get( controller );
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if ( selection ) {
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controllerToSelection.delete( controller );
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selection.parent.attach( selection.object );
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}
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} );
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function resizeRendererToDisplaySize( renderer ) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if ( needResize ) {
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renderer.setSize( width, height, false );
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}
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return needResize;
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}
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function render( time ) {
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time *= 0.001;
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if ( resizeRendererToDisplaySize( renderer ) ) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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let ndx = 0;
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for ( const mesh of meshToMeshMap.keys() ) {
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const speed = 1 + ndx * .1;
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const rot = time * speed;
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mesh.rotation.x = rot;
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mesh.rotation.y = rot;
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++ ndx;
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}
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pickHelper.update( pickRoot, time );
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renderer.render( scene, camera );
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}
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renderer.setAnimationLoop( render );
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}
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main();
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</script>
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</html>
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