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<html>
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
<meta name='mobile-web-app-capable' content='yes'>
<meta name='apple-mobile-web-app-capable' content='yes'>
<!-- Origin Trial Token, feature = WebXR Device API, origin = https://immersive-web.github.io, expires = 2018-08-28 -->
<meta http-equiv="origin-trial" data-feature="WebXR Device API" data-expires="2018-08-28" content="AnNpu7ceXvLew05ccD8Zr1OZsdZiB2hLQKK82kTTMDwF7oRKtP3QEJ4RzkeHrmB8Sq0vSV6ZNmszpBCZ0I8p9gAAAABceyJvcmlnaW4iOiJodHRwczovL2ltbWVyc2l2ZS13ZWIuZ2l0aHViLmlvOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZSIsImV4cGlyeSI6MTUzNTQxNDQwMH0=">
<title>Stereo Video Player</title>
<link href='css/common.css' rel='stylesheet'></link>
<!--The polyfill is not needed for browser that have native API support,
but is linked by these samples for wider compatibility.-->
<!--script src='https://cdn.jsdelivr.net/npm/webxr-polyfill@latest/build/webxr-polyfill.js'></script-->
<script src='js/webxr-polyfill.js'></script>
<!--This script patches up around implementation differences in past browser versions
so that the samples can always be written against the most recent spec changes.
It won't be necessary after the API has been officially shipped for a bit.-->
<script src='js/webxr-version-shim.js'></script>
<script src='js/cottontail/build/cottontail.js'></script>
<script src='js/webxr-button.js'></script>
</head>
<body>
<header>
<details open>
<summary>Stereo Video Player</summary>
<p>
This sample demonstrates how to play a stereo 3D video. (Stereo part not yet working.)
<a class="back" href="./">Back</a>
</p>
</summary>
</header>
<script>
(function () {
'use strict';
// If requested, initialize the WebXR polyfill
if (QueryArgs.getBool('allowPolyfill', false)) {
var polyfill = new WebXRPolyfill();
}
// Apply the version shim after the polyfill is instantiated, to ensure
// that the polyfill also gets patched if necessary.
var versionShim = new WebXRVersionShim();
// XR globals.
let xrButton = null;
let xrImmersiveFrameOfRef = null;
let xrNonImmersiveFrameOfRef = null;
// WebGL scene globals.
let gl = null;
let renderer = null;
let scene = new Scene();
scene.addNode(new Gltf2Node({url: 'media/gltf/home-theater/home-theater.gltf'}));
scene.enableStats(false);
let video = document.createElement('video');
video.loop = true;
video.src = 'media/video/bbb-sunflower-540p2-1min.webm';
let videoNode = new VideoNode({
video: video,
displayMode: 'stereoTopBottom'
});
// When the video is clicked we'll pause it if it's playing.
videoNode.onSelect(() => {
if (!video.paused) {
playButton.visible = true;
video.pause();
}
});
videoNode.selectable = true;
// Move back to the position of the in-room screen and size to cover it.
// Values determined experimentally and with many refreshes.
videoNode.translation = [0.025, 0.275, -4.4];
videoNode.scale = [2.1, 1.1, 1.0];
scene.addNode(videoNode);
video.addEventListener('loadeddata', () => {
// Once the video has loaded up adjust the aspect ratio of the "screen"
// to fit the video's native shape.
let aspect = videoNode.aspectRatio;
if (aspect < 2.0) {
videoNode.scale = [aspect * 1.1, 1.1, 1.0];
} else {
videoNode.scale = [2.1, 2.1 / aspect, 1.0];
}
});
// Add a button to the scene to play/pause the movie.
let playTexture = new UrlTexture('media/textures/play-button.png');
// Create a button that plays the video when clicked.
let playButton = new ButtonNode(playTexture, () => {
// Play the video and hide the button.
if (video.paused) {
playButton.visible = false;
video.play();
}
});
// Move the play button to the center of the screen and make it much
// bigger.
playButton.translation = [0.025, 0.275, -4.3];
playButton.scale = [5.0, 5.0, 5.0];
scene.addNode(playButton);
function initXR() {
xrButton = new XRDeviceButton({
onRequestSession: onRequestSession,
onEndSession: onEndSession
});
document.querySelector('header').appendChild(xrButton.domElement);
if (navigator.xr) {
navigator.xr.requestDevice().then((device) => {
device.supportsSession({immersive: true}).then(() => {
xrButton.setDevice(device);
});
let outputCanvas = document.createElement('canvas');
let ctx = outputCanvas.getContext('xrpresent');
device.requestSession({ outputContext: ctx })
.then((session) => {
document.body.appendChild(outputCanvas);
onSessionStarted(session);
});
}).catch(() => {
initFallback();
});
} else {
initFallback();
}
}
function initFallback() {
initGL();
document.body.appendChild(gl.canvas);
let fallbackHelper = new FallbackHelper(scene, gl);
}
function initGL(compatibleDevice) {
if (gl)
return;
gl = createWebGLContext({
compatibleXRDevice: compatibleDevice
});
renderer = new Renderer(gl);
scene.setRenderer(renderer);
scene.inputRenderer.setControllerMesh(new Gltf2Node({url: 'media/gltf/controller/controller.gltf'}));
}
function onRequestSession(device) {
// Set up a mirror canvas
let mirrorCanvas = document.createElement('canvas');
let ctx = mirrorCanvas.getContext('xrpresent');
mirrorCanvas.setAttribute('id', 'mirror-canvas');
document.body.appendChild(mirrorCanvas);
device.requestSession({ immersive: true, outputContext: ctx }).then((session) => {
xrButton.setSession(session);
onSessionStarted(session);
});
}
function onSessionStarted(session) {
session.addEventListener('end', onSessionEnded);
session.addEventListener('select', (ev) => {
let frameOfRef = ev.frame.session.immersive ?
xrImmersiveFrameOfRef :
xrNonImmersiveFrameOfRef;
scene.handleSelect(ev.inputSource, ev.frame, frameOfRef);
});
initGL(session.device);
session.baseLayer = new XRWebGLLayer(session, gl);
// In this case we're going to use an eye-level frame of reference
// because we want to users head to appear in the right place relative
// to the center chair, as if they're sitting in it, rather than
// somewhere in the room relative to the floor.
session.requestFrameOfReference('eye-level').then((frameOfRef) => {
if (session.immersive) {
xrImmersiveFrameOfRef = frameOfRef;
} else {
xrNonImmersiveFrameOfRef = frameOfRef;
}
session.requestAnimationFrame(onXRFrame);
});
}
function onEndSession(session) {
session.end();
}
function onSessionEnded(event) {
if (event.session.immersive) {
document.body.removeChild(document.querySelector('#mirror-canvas'));
xrButton.setSession(null);
}
}
function onXRFrame(t, frame) {
let session = frame.session;
let frameOfRef = session.immersive ?
xrImmersiveFrameOfRef :
xrNonImmersiveFrameOfRef;
let pose = frame.getDevicePose(frameOfRef);
scene.startFrame();
session.requestAnimationFrame(onXRFrame);
scene.updateInputSources(frame, frameOfRef);
scene.drawXRFrame(frame, pose);
scene.endFrame();
}
// Start the XR application.
initXR();
})();
</script>
</body>
</html>