Spaces:

mkfallah
/

webxr

Running

App Files Files Community

webxr / index.html

mkfallah

Update index.html

9ab730c verified 5 months ago

raw

history blame contribute delete

17 kB

	<!-- webxr-ar-demo.html -->
	<!doctype html>
	<html lang="fa">
	<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width,initial-scale=1.0,viewport-fit=cover" />
	<title>WebXR AR Demo — Floating Marker</title>
	<style>
	:root{
	--bg:#0f1724;
	--card:#0b1220;
	--accent:#4dd0e1;
	--muted:#9aa6b2;
	--glass: rgba(255,255,255,0.04);
	--radius: 12px;
	}
	html,body{height:100%;margin:0;background:linear-gradient(180deg,#071124,#0f1724);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;}
	#app{height:100%;display:flex;flex-direction:column;align-items:stretch;}
	#overlayUI{position:fixed;left:12px;right:12px;top:12px;display:flex;justify-content:space-between;gap:12px;z-index:50}
	.card{backdrop-filter:blur(6px);background:var(--glass);padding:8px;border-radius:999px;display:flex;gap:8px;align-items:center;}
	button{background:transparent;border:1px solid rgba(255,255,255,0.06);color:white;padding:8px 12px;border-radius:10px;font-weight:600}
	button.primary{background:linear-gradient(90deg,var(--accent),#7bdff0);color:#052026;border:0}
	#hint{position:fixed;left:12px;bottom:16px;right:12px;color:var(--muted);font-size:13px;text-align:center;z-index:40}
	#message{position:fixed;left:50%;transform:translateX(-50%);top:60px;background:rgba(0,0,0,0.5);padding:8px 12px;border-radius:10px;color:white;z-index:60}
	canvas{touch-action:none}
	/* small info card */
	#infoCard{position:fixed;right:12px;top:70px;background:linear-gradient(180deg,#071a23,#0b1620);padding:12px;border-radius:12px;color:var(--muted);font-size:13px;z-index:60;max-width:260px}
	#logo{display:flex;gap:8px;align-items:center}
	#logo .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
	</style>
	</head>
	<body>
	<div id="app">
	<div id="overlayUI">
	<div class="card">
	<div id="logo"><div class="dot"></div><div style="font-weight:700">AR-Demo</div></div>
	</div>
	<div class="card" id="controls">
	<button id="btnStart" class="primary">start ar</button>
	<button id="btnReset">reset</button>
	<button id="btnFallback">demo fallback</button>
	</div>
	</div>

	<div id="message" style="display:none"></div>
	<div id="infoCard">
	<div style="font-weight:700;color:white">Floating Marker — demo</div>
	<div style="margin-top:8px">نحوهٔ کار: روی start ar بزن. سپس صفحهٔ مرورگر اجازهٔ دسترسی به دوربین را می‌پرسد. گوشی را حرکت بده تا شیء در فضا دیده شود. با تپ روی شیء رنگ عوض می‌شود.</div>
	</div>

	<div id="container"></div>
	<div id="hint">best on Chrome (Android). requires https and camera permission.</div>
	</div>

	<!-- three.js and helpers (es modules) -->
	<script type="module">
	// imports
	import * as THREE from 'https://unpkg.com/three@0.152.2/build/three.module.js';
	import { ARButton } from 'https://unpkg.com/three@0.152.2/examples/jsm/webxr/ARButton.js';
	import { XRControllerModelFactory } from 'https://unpkg.com/three@0.152.2/examples/jsm/webxr/XRControllerModelFactory.js';

	// ui elements
	const btnStart = document.getElementById('btnStart');
	const btnReset = document.getElementById('btnReset');
	const btnFallback = document.getElementById('btnFallback');
	const message = document.getElementById('message');
	const container = document.getElementById('container');

	// scene setup variables
	let camera, scene, renderer;
	let reticle = null; // small marker
	let markerGroup = null;
	let clock = new THREE.Clock();
	let xrSessionActive = false;
	let currentColorIndex = 0;
	const colors = [0x4dd0e1, 0x7b61ff, 0xff7ab6, 0x6ee07a];

	// show temporary messages to user
	function showMsg(text, timeout=2500){
	message.style.display='block';
	message.textContent = text;
	clearTimeout(message._t);
	message._t = setTimeout(()=> message.style.display='none', timeout);
	}

	// basic three scene (not yet xr-enabled)
	function initThree(){
	// create renderer
	renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
	renderer.setPixelRatio(window.devicePixelRatio);
	renderer.setSize(window.innerWidth, window.innerHeight);
	renderer.xr.enabled = true;
	container.appendChild(renderer.domElement);

	// create scene and camera (camera will be controlled by XR)
	scene = new THREE.Scene();
	camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 0.01, 100);

	// subtle ambient and a directional light for modern look
	const ambient = new THREE.HemisphereLight(0xffffff, 0x444444, 0.6);
	scene.add(ambient);
	const dir = new THREE.DirectionalLight(0xffffff, 0.8);
	dir.position.set(0.5, 1, 0.2);
	scene.add(dir);

	// marker group: a floating sphere + halo + label
	markerGroup = new THREE.Group();
	markerGroup.visible = false;

	// sphere
	const sphereGeo = new THREE.SphereGeometry(0.12, 32, 24);
	const sphereMat = new THREE.MeshStandardMaterial({ metalness:0.3, roughness:0.2, emissive:colors[0], emissiveIntensity:0.2 });
	const sphere = new THREE.Mesh(sphereGeo, sphereMat);
	sphere.name = 'markerSphere';

	// halo (a thin torus)
	const torusGeo = new THREE.TorusGeometry(0.18, 0.02, 16, 100);
	const torusMat = new THREE.MeshBasicMaterial({ color: colors[0], transparent:true, opacity:0.9 });
	const halo = new THREE.Mesh(torusGeo, torusMat);
	halo.rotation.x = Math.PI / 2;
	halo.position.y = -0.02;

	// floating label (flat plane with basic text using canvas texture)
	const labelCanvas = document.createElement('canvas');
	labelCanvas.width = 512; labelCanvas.height = 128;
	const ctx = labelCanvas.getContext('2d');
	function updateLabel(text){
	ctx.clearRect(0,0,labelCanvas.width,labelCanvas.height);
	ctx.fillStyle = 'rgba(5,32,38,0.9)';
	ctx.fillRect(0,0,labelCanvas.width,labelCanvas.height);
	ctx.font = 'bold 46px system-ui';
	ctx.fillStyle = 'white';
	ctx.textAlign = 'center';
	ctx.fillText(text, labelCanvas.width/2, 76);
	labelTexture.needsUpdate = true;
	}
	const labelTexture = new THREE.CanvasTexture(labelCanvas);
	const labelMat = new THREE.MeshBasicMaterial({ map: labelTexture, transparent:false });
	const labelGeo = new THREE.PlaneGeometry(0.6, 0.15);
	const labelMesh = new THREE.Mesh(labelGeo, labelMat);
	labelMesh.position.y = 0.28;
	labelMesh.lookAt(0,0,0); // will be updated each frame

	updateLabel('ورودی اصلی');

	// add to group
	markerGroup.add(sphere);
	markerGroup.add(halo);
	markerGroup.add(labelMesh);
	scene.add(markerGroup);

	// reticle (small ring used when hit-test available)
	const ringGeo = new THREE.RingGeometry(0.07, 0.09, 32);
	const ringMat = new THREE.MeshBasicMaterial({ color:0xffffff, side:THREE.DoubleSide, transparent:true, opacity:0.85 });
	reticle = new THREE.Mesh(ringGeo, ringMat);
	reticle.rotation.x = -Math.PI / 2;
	reticle.visible = false;
	scene.add(reticle);

	window.addEventListener('resize', onWindowResize);
	}

	function onWindowResize(){
	if (camera){
	camera.aspect = window.innerWidth / window.innerHeight;
	camera.updateProjectionMatrix();
	}
	if (renderer) renderer.setSize(window.innerWidth, window.innerHeight);
	}

	// set marker at given position and make visible
	function placeMarkerAt(pos, quaternion){
	markerGroup.position.copy(pos);
	if (quaternion) markerGroup.quaternion.copy(quaternion);
	markerGroup.visible = true;
	showMsg('marker placed');
	}

	// change marker color (on tap)
	function cycleMarkerColor(){
	currentColorIndex = (currentColorIndex + 1) % colors.length;
	const sphere = markerGroup.getObjectByName('markerSphere');
	sphere.material.emissive.setHex(colors[currentColorIndex]);
	markerGroup.children.forEach(child=>{
	if (child.material && child.material.color){
	child.material.color.setHex(colors[currentColorIndex]);
	}
	});
	}

	// animate floating and halo
	function animateMarker(delta){
	if (!markerGroup.visible) return;
	const t = performance.now() * 0.001;
	markerGroup.position.y += Math.sin(t1.5) 0.0008; // tiny float
	// rotate halo slowly
	const halo = markerGroup.children.find(c=>c.geometry && c.geometry.type === 'TorusGeometry');
	if (halo) halo.rotation.z += delta * 0.6;
	// pulse emissive
	const sphere = markerGroup.getObjectByName('markerSphere');
	sphere.material.emissiveIntensity = 0.2 + Math.abs(Math.sin(t2)) 0.5;
	}

	// start a WebXR AR session via three's ARButton
	async function startARSession(){
	if (!renderer) initThree();

	// create AR button (hidden) to create session
	const arButton = ARButton.createButton(renderer, { requiredFeatures: ['hit-test'] });
	// programmatically click it to request permission and start session
	arButton.style.display='none';
	document.body.appendChild(arButton);
	try {
	const xrStarted = await new Promise((resolve, reject)=>{
	// attach event listeners to detect session start
	renderer.xr.addEventListener('sessionstart', ()=> resolve(true));
	renderer.xr.addEventListener('sessionend', ()=> resolve(false));
	arButton.click();
	});
	if (!xrStarted) {
	showMsg('xr session not started');
	return;
	}
	} catch(e){
	console.error(e);
	showMsg('failed to start xr: ' + (e && e.message ? e.message : e));
	return;
	}

	// set renderer animation loop
	renderer.setAnimationLoop(render);

	// request hit test source if available
	const session = renderer.xr.getSession();
	xrSessionActive = true;

	// preference: use viewer space for hit-test
	let viewerSpace = await session.requestReferenceSpace('viewer').catch(()=>null);
	if (viewerSpace){
	const hitTestSource = await session.requestHitTestSource({ space: viewerSpace }).catch(()=>null);
	// on each frame, we'll use hit test results to position reticle
	session.requestAnimationFrame(function onXRFrame(time, frame){
	// nothing here, actual rendering handled in render loop
	});
	// store in session for use in render
	session._hitTestSource = hitTestSource;
	} else {
	// no viewer space/hit-test available – we'll fallback to fixed distance placement
	showMsg('hit-test not available, using fixed distance placement');
	}

	showMsg('webxr session started', 2000);

	// controller for tap events
	const controller = renderer.xr.getController(0);
	controller.addEventListener('select', onSelect);
	scene.add(controller);
	}

	// select handler when in XR (tap on screen)
	function onSelect(){
	// prefer reticle if visible
	if (reticle && reticle.visible){
	const pos = new THREE.Vector3();
	pos.setFromMatrixPosition(reticle.matrix);
	// also get orientation from camera
	const quat = new THREE.Quaternion();
	quat.setFromRotationMatrix(reticle.matrix);
	placeMarkerAt(pos, quat);
	return;
	}
	// else place at fixed distance in front of camera (1.5m)
	const cam = renderer.xr.getCamera(camera);
	const dir = new THREE.Vector3(0,0,-1).applyQuaternion(cam.quaternion);
	const pos = new THREE.Vector3().copy(cam.position).add(dir.multiplyScalar(1.5));
	placeMarkerAt(pos, null);
	}

	// render loop
	function render(timestamp, frame){
	const delta = clock.getDelta();

	// handle hit-test if possible
	if (frame){
	const session = renderer.xr.getSession();
	if (session && session._hitTestSource){
	const hitTestResults = frame.getHitTestResults(session._hitTestSource);
	if (hitTestResults && hitTestResults.length > 0){
	const hit = hitTestResults[0];
	const pose = hit.getPose(renderer.xr.getReferenceSpace());
	reticle.visible = true;
	reticle.matrix.fromArray(pose.transform.matrix);
	reticle.matrix.decompose(reticle.position, reticle.quaternion, reticle.scale);
	} else {
	reticle.visible = false;
	}
	} else {
	// no hit test — position reticle in front of camera at fixed distance as visual guide
	const cam = renderer.xr.getCamera(camera);
	reticle.visible = true;
	const dir = new THREE.Vector3(0,0,-1).applyQuaternion(cam.quaternion);
	reticle.position.copy(cam.position).add(dir.multiplyScalar(1.6));
	reticle.quaternion.copy(cam.quaternion);
	}
	} else {
	// non-xr rendering fallback path (preview mode)
	}

	// update marker animation
	animateMarker(delta);

	// billboard the label to face camera
	if (markerGroup.visible){
	const label = markerGroup.children.find(c=>c.geometry && c.geometry.type === 'PlaneGeometry');
	if (label) label.lookAt(renderer.xr.isPresenting ? renderer.xr.getCamera(camera).position : camera.position);
	}

	renderer.render(scene, camera);
	}

	// reset scene marker
	function resetMarker(){
	if (markerGroup) markerGroup.visible=false;
	showMsg('reset');
	}

	// simple fallback demo using getUserMedia if WebXR not supported
	async function startFallbackDemo(){
	// init three if not already
	if (!renderer) initThree();
	// remove any XR session if present
	if (renderer.xr && renderer.xr.getSession()){
	try { await renderer.xr.getSession().end(); } catch(e){/ignore/}
	}
	// ask for camera permission via getUserMedia and set as video background
	const stream = await navigator.mediaDevices.getUserMedia({ video: { facingMode: 'environment' }, audio:false });
	const video = document.createElement('video');
	video.autoplay = true; video.playsInline = true; video.muted = true;
	video.srcObject = stream;
	await video.play();

	// create video background as a three texture-mapped plane behind the scene
	const videoTex = new THREE.VideoTexture(video);
	videoTex.minFilter = THREE.LinearFilter; videoTex.magFilter = THREE.LinearFilter; videoTex.format = THREE.RGBFormat;
	// place a large plane behind
	const bgMat = new THREE.MeshBasicMaterial({ map: videoTex });
	const bgGeo = new THREE.PlaneGeometry(2, 2 * (window.innerHeight / window.innerWidth));
	const bgMesh = new THREE.Mesh(bgGeo, bgMat);
	bgMesh.position.set(0,0,-1.5);
	scene.add(bgMesh);

	// show instructions
	showMsg('demo mode: tap screen to place floating marker');

	// simple tap handler for placement on center ray
	renderer.domElement.style.touchAction = 'auto';
	renderer.domElement.addEventListener('pointerdown', (e)=>{
	// place a marker in front of camera at 1.4m
	const pos = new THREE.Vector3(0,0,-1).applyQuaternion(camera.quaternion).multiplyScalar(1.4).add(camera.position);
	placeMarkerAt(pos);
	});

	// run the render loop without xr
	renderer.setAnimationLoop(()=> {
	const delta = clock.getDelta();
	animateMarker(delta);
	if (markerGroup.visible){
	const label = markerGroup.children.find(c=>c.geometry && c.geometry.type === 'PlaneGeometry');
	if (label) label.lookAt(camera.position);
	}
	renderer.render(scene,camera);
	});
	}

	// event wiring
	btnStart.addEventListener('click', async ()=>{
	if (!navigator.xr){
	showMsg('webxr not available on this browser');
	return;
	}
	// initialize three if needed
	if (!renderer) initThree();
	try {
	await startARSession();
	} catch(e){
	console.error(e);
	showMsg('could not start webxr: ' + (e.message \|\| e));
	}
	});

	btnReset.addEventListener('click', ()=> resetMarker());
	btnFallback.addEventListener('click', ()=> {
	if (!renderer) initThree();
	startFallbackDemo().catch(err=> {
	console.error(err);
	showMsg('fallback failed: ' + (err && err.message ? err.message : err));
	});
	});

	// interaction: toggle color when tapping on marker in fallback or when in XR via select event
	// add a pointerdown that raycasts to sphere (for fallback mode)
	function setupPointerInteraction(){
	const raycaster = new THREE.Raycaster();
	const pointer = new THREE.Vector2();
	renderer.domElement.addEventListener('pointerdown', (ev)=>{
	// calculate pointer position
	pointer.x = (ev.clientX / window.innerWidth) * 2 - 1;
	pointer.y = - (ev.clientY / window.innerHeight) * 2 + 1;
	raycaster.setFromCamera(pointer, camera);
	const intersects = raycaster.intersectObjects(markerGroup.children, true);
	if (intersects.length > 0){
	cycleMarkerColor();
	}
	});
	}

	// initialize on load for quick demo
	initThree();
	setupPointerInteraction();
	showMsg('ready — use start ar or demo fallback');

	</script>
	</body>
	</html>