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| class VRButton { | |
| static createButton( renderer, sessionInit = {} ) { | |
| const button = document.createElement( 'button' ); | |
| function showEnterVR( /*device*/ ) { | |
| let currentSession = null; | |
| async function onSessionStarted( session ) { | |
| session.addEventListener( 'end', onSessionEnded ); | |
| await renderer.xr.setSession( session ); | |
| button.textContent = 'EXIT VR'; | |
| currentSession = session; | |
| } | |
| function onSessionEnded( /*event*/ ) { | |
| currentSession.removeEventListener( 'end', onSessionEnded ); | |
| button.textContent = 'ENTER VR'; | |
| currentSession = null; | |
| } | |
| // | |
| button.style.display = ''; | |
| button.style.cursor = 'pointer'; | |
| button.style.left = 'calc(50% - 50px)'; | |
| button.style.width = '100px'; | |
| button.textContent = 'ENTER VR'; | |
| // WebXR's requestReferenceSpace only works if the corresponding feature | |
| // was requested at session creation time. For simplicity, just ask for | |
| // the interesting ones as optional features, but be aware that the | |
| // requestReferenceSpace call will fail if it turns out to be unavailable. | |
| // ('local' is always available for immersive sessions and doesn't need to | |
| // be requested separately.) | |
| const sessionOptions = { | |
| ...sessionInit, | |
| optionalFeatures: [ | |
| 'local-floor', | |
| 'bounded-floor', | |
| 'layers', | |
| ...( sessionInit.optionalFeatures || [] ) | |
| ], | |
| }; | |
| button.onmouseenter = function () { | |
| button.style.opacity = '1.0'; | |
| }; | |
| button.onmouseleave = function () { | |
| button.style.opacity = '0.5'; | |
| }; | |
| button.onclick = function () { | |
| if ( currentSession === null ) { | |
| navigator.xr.requestSession( 'immersive-vr', sessionOptions ).then( onSessionStarted ); | |
| } else { | |
| currentSession.end(); | |
| if ( navigator.xr.offerSession !== undefined ) { | |
| navigator.xr.offerSession( 'immersive-vr', sessionOptions ) | |
| .then( onSessionStarted ) | |
| .catch( ( err ) => { | |
| console.warn( err ); | |
| } ); | |
| } | |
| } | |
| }; | |
| if ( navigator.xr.offerSession !== undefined ) { | |
| navigator.xr.offerSession( 'immersive-vr', sessionOptions ) | |
| .then( onSessionStarted ) | |
| .catch( ( err ) => { | |
| console.warn( err ); | |
| } ); | |
| } | |
| } | |
| function disableButton() { | |
| button.style.display = ''; | |
| button.style.cursor = 'auto'; | |
| button.style.left = 'calc(50% - 75px)'; | |
| button.style.width = '150px'; | |
| button.onmouseenter = null; | |
| button.onmouseleave = null; | |
| button.onclick = null; | |
| } | |
| function showWebXRNotFound() { | |
| disableButton(); | |
| button.textContent = 'VR NOT SUPPORTED'; | |
| } | |
| function showVRNotAllowed( exception ) { | |
| disableButton(); | |
| console.warn( 'Exception when trying to call xr.isSessionSupported', exception ); | |
| button.textContent = 'VR NOT ALLOWED'; | |
| } | |
| function stylizeElement( element ) { | |
| element.style.position = 'absolute'; | |
| element.style.bottom = '20px'; | |
| element.style.padding = '12px 6px'; | |
| element.style.border = '1px solid #fff'; | |
| element.style.borderRadius = '4px'; | |
| element.style.background = 'rgba(0,0,0,0.1)'; | |
| element.style.color = '#fff'; | |
| element.style.font = 'normal 13px sans-serif'; | |
| element.style.textAlign = 'center'; | |
| element.style.opacity = '0.5'; | |
| element.style.outline = 'none'; | |
| element.style.zIndex = '999'; | |
| } | |
| if ( 'xr' in navigator ) { | |
| button.id = 'VRButton'; | |
| button.style.display = 'none'; | |
| stylizeElement( button ); | |
| navigator.xr.isSessionSupported( 'immersive-vr' ).then( function ( supported ) { | |
| supported ? showEnterVR() : showWebXRNotFound(); | |
| if ( supported && VRButton.xrSessionIsGranted ) { | |
| button.click(); | |
| } | |
| } ).catch( showVRNotAllowed ); | |
| return button; | |
| } else { | |
| const message = document.createElement( 'a' ); | |
| if ( window.isSecureContext === false ) { | |
| message.href = document.location.href.replace( /^http:/, 'https:' ); | |
| message.innerHTML = 'WEBXR NEEDS HTTPS'; // TODO Improve message | |
| } else { | |
| message.href = 'https://immersiveweb.dev/'; | |
| message.innerHTML = 'WEBXR NOT AVAILABLE'; | |
| } | |
| message.style.left = 'calc(50% - 90px)'; | |
| message.style.width = '180px'; | |
| message.style.textDecoration = 'none'; | |
| stylizeElement( message ); | |
| return message; | |
| } | |
| } | |
| static registerSessionGrantedListener() { | |
| if ( typeof navigator !== 'undefined' && 'xr' in navigator ) { | |
| // WebXRViewer (based on Firefox) has a bug where addEventListener | |
| // throws a silent exception and aborts execution entirely. | |
| if ( /WebXRViewer\//i.test( navigator.userAgent ) ) return; | |
| navigator.xr.addEventListener( 'sessiongranted', () => { | |
| VRButton.xrSessionIsGranted = true; | |
| } ); | |
| } | |
| } | |
| } | |
| VRButton.xrSessionIsGranted = false; | |
| VRButton.registerSessionGrantedListener(); | |
| export { VRButton }; | |