CODEWITHSUNDEEP
csshtmlthree.jswebglaframe
Bruno Cerk
Bruno Cerk

Reputation: 355

View Image like in inverted carrousel or VR/Spherical

i'm trying to build something like this:

From https://github.com/nicklockwood/iCarousel

But the difference is that i have a background image 4096x1024 and i wanted to look like it's some kind of VR look, that the center is a bit far away from the screen and the edges are a bit stretched and closer

I managed to use aframes and set my image to the background of a <a-sky> tag, so it warps my image in a sphere and the view or camera, in the center of the sphere. I get the right type of view that i want, the problem is that i think there are lighter solutions for this. I also want to put text and i would like it to act the same way the image acts.

Thats what i archived with aframes : Gif on Imgur

I don't want to move around the scene/screen ( with AWDS), just to move the screen horizontal because i will have elements that the user needs to move the screen to see them, just like on the gif and on common carrossel.

Upvotes: 0

Views: 209

Answers (1)

Jorjon
Jorjon

Reputation: 5434

Define "lighter". A-Frame is built on WebVR and three.js, so if you don't want A-Frame dependency, maybe you can build the panorama yourself using three.js. It actually already has an example on how to do so:

https://threejs.org/examples/webgl_panorama_equirectangular.html

<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/92/three.js"></script>
<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - equirectangular panorama</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
			}
			#info {
				position: absolute;
				top: 0px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family:Monospace;
				font-size:13px;
				font-weight: bold;
				text-align:center;
			}
			a {
				color: #ffffff;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js webgl</a> - equirectangular panorama demo. photo by <a href="http://www.flickr.com/photos/jonragnarsson/2294472375/" target="_blank" rel="noopener">Jón Ragnarsson</a>.<br />
			drag equirectangular texture into the page.
		</div>

		<script>
			var camera, scene, renderer;
			var isUserInteracting = false,
			onMouseDownMouseX = 0, onMouseDownMouseY = 0,
			lon = 0, onMouseDownLon = 0,
			lat = 0, onMouseDownLat = 0,
			phi = 0, theta = 0;
			init();
			animate();
			function init() {
				var container, mesh;
				container = document.getElementById( 'container' );
				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 1100 );
				camera.target = new THREE.Vector3( 0, 0, 0 );
				scene = new THREE.Scene();
				var geometry = new THREE.SphereBufferGeometry( 500, 60, 40 );
				// invert the geometry on the x-axis so that all of the faces point inward
				geometry.scale( - 1, 1, 1 );
				var material = new THREE.MeshBasicMaterial( {
					map: new THREE.TextureLoader().load( 'https://farm4.staticflickr.com/3289/2294472375_24a3b8ef46_o.jpg' )
				} );
				mesh = new THREE.Mesh( geometry, material );
				scene.add( mesh );
				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );
				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'mouseup', onDocumentMouseUp, false );
				document.addEventListener( 'wheel', onDocumentMouseWheel, false );
				//
				document.addEventListener( 'dragover', function ( event ) {
					event.preventDefault();
					event.dataTransfer.dropEffect = 'copy';
				}, false );
				document.addEventListener( 'dragenter', function ( event ) {
					document.body.style.opacity = 0.5;
				}, false );
				document.addEventListener( 'dragleave', function ( event ) {
					document.body.style.opacity = 1;
				}, false );
				document.addEventListener( 'drop', function ( event ) {
					event.preventDefault();
					var reader = new FileReader();
					reader.addEventListener( 'load', function ( event ) {
						material.map.image.src = event.target.result;
						material.map.needsUpdate = true;
					}, false );
					reader.readAsDataURL( event.dataTransfer.files[ 0 ] );
					document.body.style.opacity = 1;
				}, false );
				//
				window.addEventListener( 'resize', onWindowResize, false );
			}
			function onWindowResize() {
				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();
				renderer.setSize( window.innerWidth, window.innerHeight );
			}
			function onDocumentMouseDown( event ) {
				event.preventDefault();
				isUserInteracting = true;
				onMouseDownMouseX = event.clientX;
				onMouseDownMouseY = event.clientY;
				onMouseDownLon = lon;
				onMouseDownLat = lat;
			}
			function onDocumentMouseMove( event ) {
				if ( isUserInteracting === true ) {
					lon = ( onMouseDownMouseX - event.clientX ) * 0.1 + onMouseDownLon;
					lat = ( event.clientY - onMouseDownMouseY ) * 0.1 + onMouseDownLat;
				}
			}
			function onDocumentMouseUp( event ) {
				isUserInteracting = false;
			}
			function onDocumentMouseWheel( event ) {
				var fov = camera.fov + event.deltaY * 0.05;
				camera.fov = THREE.Math.clamp( fov, 10, 75 );
				camera.updateProjectionMatrix();
			}
			function animate() {
				requestAnimationFrame( animate );
				update();
			}
			function update() {
				if ( isUserInteracting === false ) {
					lon += 0.1;
				}
				lat = Math.max( - 85, Math.min( 85, lat ) );
				phi = THREE.Math.degToRad( 90 - lat );
				theta = THREE.Math.degToRad( lon );
				camera.target.x = 500 * Math.sin( phi ) * Math.cos( theta );
				//camera.target.y = 500 * Math.cos( phi ); // comment this to disable Y axis
				camera.target.z = 500 * Math.sin( phi ) * Math.sin( theta );
				camera.lookAt( camera.target );
				/*
				// distortion
				camera.position.copy( camera.target ).negate();
				*/
				renderer.render( scene, camera );
			}
		</script>
	</body>
</html>

Upvotes: 1

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