File: //var/www/aspa/three/addons/webxr/ARButton.js
class ARButton {
static createButton( renderer, sessionInit = {} ) {
const button = document.createElement( 'button' );
function showStartAR( /*device*/ ) {
if ( sessionInit.domOverlay === undefined ) {
const overlay = document.createElement( 'div' );
overlay.style.display = 'none';
document.body.appendChild( overlay );
const svg = document.createElementNS( 'http://www.w3.org/2000/svg', 'svg' );
svg.setAttribute( 'width', 38 );
svg.setAttribute( 'height', 38 );
svg.style.position = 'absolute';
svg.style.right = '20px';
svg.style.top = '20px';
svg.addEventListener( 'click', function () {
currentSession.end();
} );
overlay.appendChild( svg );
const path = document.createElementNS( 'http://www.w3.org/2000/svg', 'path' );
path.setAttribute( 'd', 'M 12,12 L 28,28 M 28,12 12,28' );
path.setAttribute( 'stroke', '#fff' );
path.setAttribute( 'stroke-width', 2 );
svg.appendChild( path );
if ( sessionInit.optionalFeatures === undefined ) {
sessionInit.optionalFeatures = [];
}
sessionInit.optionalFeatures.push( 'dom-overlay' );
sessionInit.domOverlay = { root: overlay };
}
//
let currentSession = null;
async function onSessionStarted( session ) {
session.addEventListener( 'end', onSessionEnded );
renderer.xr.setReferenceSpaceType( 'local' );
await renderer.xr.setSession( session );
button.textContent = 'STOP AR';
sessionInit.domOverlay.root.style.display = '';
currentSession = session;
}
function onSessionEnded( /*event*/ ) {
currentSession.removeEventListener( 'end', onSessionEnded );
button.textContent = 'START AR';
sessionInit.domOverlay.root.style.display = 'none';
currentSession = null;
}
//
button.style.display = '';
button.style.cursor = 'pointer';
button.style.left = 'calc(50% - 50px)';
button.style.width = '100px';
button.textContent = 'START AR';
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-ar', sessionInit ).then( onSessionStarted );
} else {
currentSession.end();
if ( navigator.xr.offerSession !== undefined ) {
navigator.xr.offerSession( 'immersive-ar', sessionInit )
.then( onSessionStarted )
.catch( ( err ) => {
console.warn( err );
} );
}
}
};
if ( navigator.xr.offerSession !== undefined ) {
navigator.xr.offerSession( 'immersive-ar', sessionInit )
.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 showARNotSupported() {
disableButton();
button.textContent = 'AR NOT SUPPORTED';
}
function showARNotAllowed( exception ) {
disableButton();
console.warn( 'Exception when trying to call xr.isSessionSupported', exception );
button.textContent = 'AR 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 = 'ARButton';
button.style.display = 'none';
stylizeElement( button );
navigator.xr.isSessionSupported( 'immersive-ar' ).then( function ( supported ) {
supported ? showStartAR() : showARNotSupported();
} ).catch( showARNotAllowed );
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 { ARButton };