我在手机中使用谷歌浏览器(59.0.3071.125(
我启用了：WebVR，我的chrome中的游戏手柄，当我第一次尝试工作时，使用 chrome://flags/来支持WEBVR 但是 2 天后，现在它给出了这个异常：
未捕获(承诺中(DOMException：演示请求被拒绝。
我不知道为什么。 我试图四处搜索，但一无所获
以下是我尝试过的 https://threejs.org/examples/?q=vr#webvr_cubes 代码
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webvr - cubes</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<!-- Origin Trial Token, feature = WebVR, origin = https://threejs.org, expires = 2017-06-13 -->
<meta http-equiv="origin-trial" data-feature="WebVR" data-expires="2017-06-13" content="ApAQvHfiHMQB7SmRhfvCUX61adJaTA6pAu0Ry439jjeipa5lGm1RcTQynFoHGGcaSJkWfMOv7qK6pwSUb95ClQgAAABKeyJvcmlnaW4iOiJodHRwczovL3RocmVlanMub3JnOjQ0MyIsImZlYXR1cmUiOiJXZWJWUiIsImV4cGlyeSI6MTQ5NzMxMjAwMH0=">
<style>
body {
font-family: Monospace;
background-color: #101010;
color: #fff;
margin: 0px;
overflow: hidden;
}
a {
color: #f00;
}
</style>
</head>
<body>
<script src="../build/three.js"></script>
<script src="js/controls/VRControls.js"></script>
<script src="js/effects/VREffect.js"></script>
<script src="js/vr/WebVR.js"></script>
<script>
if ( WEBVR.isAvailable() === false ) {
document.body.appendChild( WEBVR.getMessage() );
}
//
var clock = new THREE.Clock();
var container;
var camera, scene, raycaster, renderer;
var effect, controls;
var room;
var isMouseDown = false;
var INTERSECTED;
var crosshair;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = '<a href="http://threejs.org" target="_blank">three.js</a> webgl - interactive cubes';
container.appendChild( info );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.1, 10 );
scene.add( camera );
crosshair = new THREE.Mesh(
new THREE.RingGeometry( 0.02, 0.04, 32 ),
new THREE.MeshBasicMaterial( {
color: 0xffffff,
opacity: 0.5,
transparent: true
} )
);
crosshair.position.z = - 2;
camera.add( crosshair );
room = new THREE.Mesh(
new THREE.BoxGeometry( 6, 6, 6, 8, 8, 8 ),
new THREE.MeshBasicMaterial( { color: 0x404040, wireframe: true } )
);
scene.add( room );
scene.add( new THREE.HemisphereLight( 0x606060, 0x404040 ) );
var light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 1, 1, 1 ).normalize();
scene.add( light );
var geometry = new THREE.BoxGeometry( 0.15, 0.15, 0.15 );
for ( var i = 0; i < 200; i ++ ) {
var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } ) );
object.position.x = Math.random() * 4 - 2;
object.position.y = Math.random() * 4 - 2;
object.position.z = Math.random() * 4 - 2;
object.rotation.x = Math.random() * 2 * Math.PI;
object.rotation.y = Math.random() * 2 * Math.PI;
object.rotation.z = Math.random() * 2 * Math.PI;
object.scale.x = Math.random() + 0.5;
object.scale.y = Math.random() + 0.5;
object.scale.z = Math.random() + 0.5;
object.userData.velocity = new THREE.Vector3();
object.userData.velocity.x = Math.random() * 0.01 - 0.005;
object.userData.velocity.y = Math.random() * 0.01 - 0.005;
object.userData.velocity.z = Math.random() * 0.01 - 0.005;
room.add( object );
}
raycaster = new THREE.Raycaster();
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setClearColor( 0x505050 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.sortObjects = false;
container.appendChild( renderer.domElement );
controls = new THREE.VRControls( camera );
effect = new THREE.VREffect( renderer );
WEBVR.getVRDisplay( function ( display ) {
document.body.appendChild( WEBVR.getButton( display, renderer.domElement ) );
} );
renderer.domElement.addEventListener( 'mousedown', onMouseDown, false );
renderer.domElement.addEventListener( 'mouseup', onMouseUp, false );
renderer.domElement.addEventListener( 'touchstart', onMouseDown, false );
renderer.domElement.addEventListener( 'touchend', onMouseUp, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onMouseDown() {
isMouseDown = true;
}
function onMouseUp() {
isMouseDown = false;
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
effect.setSize( window.innerWidth, window.innerHeight );
}
//
function animate() {
effect.requestAnimationFrame( animate );
render();
}
function render() {
var delta = clock.getDelta() * 60;
if ( isMouseDown === true ) {
var cube = room.children[ 0 ];
room.remove( cube );
cube.position.set( 0, 0, - 0.75 );
cube.position.applyQuaternion( camera.quaternion );
cube.userData.velocity.x = ( Math.random() - 0.5 ) * 0.02 * delta;
cube.userData.velocity.y = ( Math.random() - 0.5 ) * 0.02 * delta;
cube.userData.velocity.z = ( Math.random() * 0.01 - 0.05 ) * delta;
cube.userData.velocity.applyQuaternion( camera.quaternion );
room.add( cube );
}
// find intersections
raycaster.setFromCamera( { x: 0, y: 0 }, camera );
var intersects = raycaster.intersectObjects( room.children );
if ( intersects.length > 0 ) {
if ( INTERSECTED != intersects[ 0 ].object ) {
if ( INTERSECTED ) INTERSECTED.material.emissive.setHex( INTERSECTED.currentHex );
INTERSECTED = intersects[ 0 ].object;
INTERSECTED.currentHex = INTERSECTED.material.emissive.getHex();
INTERSECTED.material.emissive.setHex( 0xff0000 );
}
} else {
if ( INTERSECTED ) INTERSECTED.material.emissive.setHex( INTERSECTED.currentHex );
INTERSECTED = undefined;
}
// Keep cubes inside room
for ( var i = 0; i < room.children.length; i ++ ) {
var cube = room.children[ i ];
cube.userData.velocity.multiplyScalar( 1 - ( 0.001 * delta ) );
cube.position.add( cube.userData.velocity );
if ( cube.position.x < - 3 || cube.position.x > 3 ) {
cube.position.x = THREE.Math.clamp( cube.position.x, - 3, 3 );
cube.userData.velocity.x = - cube.userData.velocity.x;
}
if ( cube.position.y < - 3 || cube.position.y > 3 ) {
cube.position.y = THREE.Math.clamp( cube.position.y, - 3, 3 );
cube.userData.velocity.y = - cube.userData.velocity.y;
}
if ( cube.position.z < - 3 || cube.position.z > 3 ) {
cube.position.z = THREE.Math.clamp( cube.position.z, - 3, 3 );
cube.userData.velocity.z = - cube.userData.velocity.z;
}
cube.rotation.x += cube.userData.velocity.x * 2 * delta;
cube.rotation.y += cube.userData.velocity.y * 2 * delta;
cube.rotation.z += cube.userData.velocity.z * 2 * delta;
}
controls.update();
effect.render( scene, camera );
}
</script>
</body>
</html>
我刚刚遇到了一个非常相似的问题。 看起来VRButton不能很好地与requestAnimationFrame配合使用。 相反，您需要使用 renderer.setAnimiationLoop。
您的代码：
function animate() {
effect.requestAnimationFrame( animate );
render();
}
将其更改为：
function animate() {
renderer.setAnimationLoop(() => { render(); });
}