class XRButton {
static createButton( renderer, sessionInit = {} ) {
const button = document.createElement( 'button' );
function showStartXR( mode ) {
let currentSession = null;
async function onSessionStarted( session ) {
session.addEventListener( 'end', onSessionEnded );
await renderer.xr.setSession( session );
button.textContent = 'STOP XR';
currentSession = session;
}
function onSessionEnded( /*event*/ ) {
currentSession.removeEventListener( 'end', onSessionEnded );
button.textContent = 'START XR';
currentSession = null;
}
//
button.style.display = '';
button.style.cursor = 'pointer';
button.style.left = 'calc(50% - 50px)';
button.style.width = '100px';
button.textContent = 'START XR';
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( mode, sessionOptions )
.then( onSessionStarted );
} else {
currentSession.end();
if ( navigator.xr.offerSession !== undefined ) {
navigator.xr.offerSession( mode, sessionOptions )
.then( onSessionStarted )
.catch( ( err ) => {
console.warn( err );
} );
}
}
};
if ( navigator.xr.offerSession !== undefined ) {
navigator.xr.offerSession( mode, 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 showXRNotSupported() {
disableButton();
button.textContent = 'XR NOT SUPPORTED';
}
function showXRNotAllowed( exception ) {
disableButton();
console.warn( 'Exception when trying to call xr.isSessionSupported', exception );
button.textContent = 'XR 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 = 'XRButton';
button.style.display = 'none';
stylizeElement( button );
navigator.xr.isSessionSupported( 'immersive-ar' )
.then( function ( supported ) {
if ( supported ) {
showStartXR( 'immersive-ar' );
} else {
navigator.xr.isSessionSupported( 'immersive-vr' )
.then( function ( supported ) {
if ( supported ) {
showStartXR( 'immersive-vr' );
} else {
showXRNotSupported();
}
} ).catch( showXRNotAllowed );
}
} ).catch( showXRNotAllowed );
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;
}
}
}
export { XRButton };
