tests/composed-views.html - external/github.com/immersive-web/webxr-samples - Git at Google

 <!doctype html>
 <!--
 Copyright 2018 The Immersive Web Community Group

 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software is furnished to do so,
 subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 -->
 <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'>
     <link rel='icon' type='image/png' sizes='32x32' href='../favicon-32x32.png'>
     <link rel='icon' type='image/png' sizes='96x96' href='../favicon-96x96.png'>
     <link rel='stylesheet' href='../css/common.css'>

     <title>Composed Views</title>
   </head>
   <body>
     <header>
       <details id='details-panel' open>
         <summary>Composed Views</summary>
         <p>
           Tests a scenario where views are computed from the viewer space and
           composed with a separately queried viewer pose in the main scene
           reference space. This was known to be buggy in with some implementations.

           Please note this is NOT the recommended way of using the API, but it
           provides a useful validation case for implementers.
           <a class="back" href="./">Back</a>
         </p>
       </details>
     </header>
     <main style='text-align: center;'>
       <p>Click 'Enter XR' to see content</p>
     </main>
     <script type="module">
       import {WebXRButton} from '../js/util/webxr-button.js';
       import {Scene} from '../js/render/scenes/scene.js';
       import {Renderer, createWebGLContext, RenderView} from '../js/render/core/renderer.js';
       import {Gltf2Node} from '../js/render/nodes/gltf2.js';
       import {QueryArgs} from '../js/util/query-args.js';
       import {mat4} from '../js/render/math/gl-matrix.js';

       // If requested, use the polyfill to provide support for mobile devices
       // and devices which only support WebVR.
       import WebXRPolyfill from '../js/third-party/webxr-polyfill/build/webxr-polyfill.module.js';
       if (QueryArgs.getBool('usePolyfill', true)) {
         let polyfill = new WebXRPolyfill();
       }

       // XR globals.
       let xrButton = null;
       let xrViewerSpace = null;
       let xrFloorSpace = null;

       // WebGL scene globals.
       let gl = null;
       let renderer = null;
       let scene = new Scene();
       scene.addNode(new Gltf2Node({url: '../media/gltf/cube-room/cube-room.gltf'}));
       scene.standingStats(true);

       function initXR() {
         xrButton = new WebXRButton({
           onRequestSession: onRequestSession,
           onEndSession: onEndSession
         });
         document.querySelector('header').appendChild(xrButton.domElement);

         if (navigator.xr) {
           navigator.xr.isSessionSupported('immersive-vr').then((supported) => {
             xrButton.enabled = supported;
           });
         }
       }

       function initGL() {
         if (gl)
           return;

         gl = createWebGLContext({
           xrCompatible: true
         });

         document.body.appendChild(gl.canvas);

         function onResize() {
           gl.canvas.width = gl.canvas.clientWidth * window.devicePixelRatio;
           gl.canvas.height = gl.canvas.clientHeight * window.devicePixelRatio;
         }
         window.addEventListener('resize', onResize);
         onResize();

         // Set up a non-black clear color so that we can see if something renders wrong.
         gl.clearColor(0.1, 0.2, 0.3, 1.0);

         renderer = new Renderer(gl);
         scene.setRenderer(renderer);
       }

       function onRequestSession() {
         return navigator.xr.requestSession('immersive-vr', {
             requiredFeatures: ['local-floor'],
         }).then((session) => {
           xrButton.setSession(session);
           session.isImmersive = true;
           onSessionStarted(session);
         });
       }

       async function onSessionStarted(session) {
         session.addEventListener('end', onSessionEnded);

         initGL();
         scene.inputRenderer.useProfileControllerMeshes(session);

         session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });

         xrViewerSpace = await session.requestReferenceSpace('viewer');
         xrFloorSpace = await session.requestReferenceSpace('local-floor');

         session.requestAnimationFrame(onXRFrame);
       }

       function onEndSession(session) {
         session.end();
       }

       function onSessionEnded(event) {
         xrButton.setSession(null);
       }

       let tmpMat = mat4.create();
       function onXRFrame(t, frame) {
         let session = frame.session;
         // Get the viewer pose in viewer space, which means the pose transform
         // should be an identity matrix and the view transforms will effectively
         // be the views offsets from the center of the viewer.
         let viewerPose = frame.getViewerPose(xrViewerSpace);

         // Also query the pose of the viewer space in the local-floor space.
         let pose = frame.getPose(xrViewerSpace, xrFloorSpace);

         session.requestAnimationFrame(onXRFrame);

         scene.updateInputSources(frame, xrFloorSpace);

         if (!viewerPose || !pose) {
           return;
         }

         scene.startFrame();

         let glLayer = session.renderState.baseLayer;
         gl.bindFramebuffer(gl.FRAMEBUFFER, glLayer.framebuffer);
         gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

         let renderViews = [];
         for (let view of viewerPose.views) {
           let viewport = glLayer.getViewport(view);
           gl.viewport(viewport.x, viewport.y,
                       viewport.width, viewport.height);

           // Manually combine the viewer's transform with the transform of the
           // individual view to get a matrix that represents the fully composed
           // transform.
           mat4.multiply(tmpMat, pose.transform.matrix, view.transform.matrix);
           mat4.invert(tmpMat, tmpMat);
           renderViews.push(new RenderView(view.projectionMatrix, tmpMat, viewport, view.eye));
         }
         scene.drawViewArray(renderViews);

         scene.endFrame();
       }

       // Start the XR application.
       initXR();
     </script>
   </body>
 </html>
	<!doctype html>
	<!--
	Copyright 2018 The Immersive Web Community Group

	Permission is hereby granted, free of charge, to any person obtaining a copy of
	this software and associated documentation files (the "Software"), to deal in
	the Software without restriction, including without limitation the rights to
	use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
	the Software, and to permit persons to whom the Software is furnished to do so,
	subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
	FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
	COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
	IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	-->
	<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'>
	<link rel='icon' type='image/png' sizes='32x32' href='../favicon-32x32.png'>
	<link rel='icon' type='image/png' sizes='96x96' href='../favicon-96x96.png'>
	<link rel='stylesheet' href='../css/common.css'>

	<title>Composed Views</title>
	</head>
	<body>
	<header>
	<details id='details-panel' open>
	<summary>Composed Views</summary>
	<p>
	Tests a scenario where views are computed from the viewer space and
	composed with a separately queried viewer pose in the main scene
	reference space. This was known to be buggy in with some implementations.

	Please note this is NOT the recommended way of using the API, but it
	provides a useful validation case for implementers.
	<a class="back" href="./">Back</a>
	</p>
	</details>
	</header>
	<main style='text-align: center;'>
	<p>Click 'Enter XR' to see content</p>
	</main>
	<script type="module">
	import {WebXRButton} from '../js/util/webxr-button.js';
	import {Scene} from '../js/render/scenes/scene.js';
	import {Renderer, createWebGLContext, RenderView} from '../js/render/core/renderer.js';
	import {Gltf2Node} from '../js/render/nodes/gltf2.js';
	import {QueryArgs} from '../js/util/query-args.js';
	import {mat4} from '../js/render/math/gl-matrix.js';

	// If requested, use the polyfill to provide support for mobile devices
	// and devices which only support WebVR.
	import WebXRPolyfill from '../js/third-party/webxr-polyfill/build/webxr-polyfill.module.js';
	if (QueryArgs.getBool('usePolyfill', true)) {
	let polyfill = new WebXRPolyfill();
	}

	// XR globals.
	let xrButton = null;
	let xrViewerSpace = null;
	let xrFloorSpace = null;

	// WebGL scene globals.
	let gl = null;
	let renderer = null;
	let scene = new Scene();
	scene.addNode(new Gltf2Node({url: '../media/gltf/cube-room/cube-room.gltf'}));
	scene.standingStats(true);

	function initXR() {
	xrButton = new WebXRButton({
	onRequestSession: onRequestSession,
	onEndSession: onEndSession
	});
	document.querySelector('header').appendChild(xrButton.domElement);

	if (navigator.xr) {
	navigator.xr.isSessionSupported('immersive-vr').then((supported) => {
	xrButton.enabled = supported;
	});
	}
	}

	function initGL() {
	if (gl)
	return;

	gl = createWebGLContext({
	xrCompatible: true
	});

	document.body.appendChild(gl.canvas);

	function onResize() {
	gl.canvas.width = gl.canvas.clientWidth * window.devicePixelRatio;
	gl.canvas.height = gl.canvas.clientHeight * window.devicePixelRatio;
	}
	window.addEventListener('resize', onResize);
	onResize();

	// Set up a non-black clear color so that we can see if something renders wrong.
	gl.clearColor(0.1, 0.2, 0.3, 1.0);

	renderer = new Renderer(gl);
	scene.setRenderer(renderer);
	}

	function onRequestSession() {
	return navigator.xr.requestSession('immersive-vr', {
	requiredFeatures: ['local-floor'],
	}).then((session) => {
	xrButton.setSession(session);
	session.isImmersive = true;
	onSessionStarted(session);
	});
	}

	async function onSessionStarted(session) {
	session.addEventListener('end', onSessionEnded);

	initGL();
	scene.inputRenderer.useProfileControllerMeshes(session);

	session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });

	xrViewerSpace = await session.requestReferenceSpace('viewer');
	xrFloorSpace = await session.requestReferenceSpace('local-floor');

	session.requestAnimationFrame(onXRFrame);
	}

	function onEndSession(session) {
	session.end();
	}

	function onSessionEnded(event) {
	xrButton.setSession(null);
	}

	let tmpMat = mat4.create();
	function onXRFrame(t, frame) {
	let session = frame.session;
	// Get the viewer pose in viewer space, which means the pose transform
	// should be an identity matrix and the view transforms will effectively
	// be the views offsets from the center of the viewer.
	let viewerPose = frame.getViewerPose(xrViewerSpace);

	// Also query the pose of the viewer space in the local-floor space.
	let pose = frame.getPose(xrViewerSpace, xrFloorSpace);

	session.requestAnimationFrame(onXRFrame);

	scene.updateInputSources(frame, xrFloorSpace);

	if (!viewerPose \|\| !pose) {
	return;
	}

	scene.startFrame();

	let glLayer = session.renderState.baseLayer;
	gl.bindFramebuffer(gl.FRAMEBUFFER, glLayer.framebuffer);
	gl.clear(gl.COLOR_BUFFER_BIT \| gl.DEPTH_BUFFER_BIT);

	let renderViews = [];
	for (let view of viewerPose.views) {
	let viewport = glLayer.getViewport(view);
	gl.viewport(viewport.x, viewport.y,
	viewport.width, viewport.height);

	// Manually combine the viewer's transform with the transform of the
	// individual view to get a matrix that represents the fully composed
	// transform.
	mat4.multiply(tmpMat, pose.transform.matrix, view.transform.matrix);
	mat4.invert(tmpMat, tmpMat);
	renderViews.push(new RenderView(view.projectionMatrix, tmpMat, viewport, view.eye));
	}
	scene.drawViewArray(renderViews);

	scene.endFrame();
	}

	// Start the XR application.
	initXR();
	</script>
	</body>
	</html>