Equirectangular Panorama

by andy_fury

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r121/three.min.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">
	</head>
	<body>

		<div id="container"></div>
	
	</body>
</html>

CSS

body {
	margin: 0;
}

canvas {
	display: block;
}

JavaScript

var camera, scene, renderer;

			var isUserInteracting = false,
				onPointerDownMouseX = 0, onPointerDownMouseY = 0,
				lon = 0, onPointerDownLon = 0,
				lat = 0, onPointerDownLat = 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 texture = new THREE.TextureLoader().load( 'https://i.imgur.com/JQj0qVk.jpg' );
				var material = new THREE.MeshBasicMaterial( { map: texture } );

				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 );

				container.style.touchAction = 'none';
				container.addEventListener( 'pointerdown', onPointerDown, false );

				document.addEventListener( 'wheel', onDocumentMouseWheel, false );

				//

				document.addEventListener( 'dragover', function ( event ) {

					event.preventDefault();
					event.dataTransfer.dropEffect = 'copy';

				}, false );

				document.addEventListener( 'dragenter', function () {

					document.body.style.opacity = 0.5;

				}, false );

				document.addEventListener( 'dragleave', function () {

					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...