利用html5实现的360度全景图浏览（带天地）
var camera, scene, renderer; var texture_placeholder,
isUserInteracting = false,
onMouseDownMouseX = 0, onMouseDownMouseY = 0,
lon = 90, onMouseDownLon = 0,
lat = 0, onMouseDownLat = 0,
phi = 0, theta = 0,
target = new THREE.Vector3(); init(); function init() { var container, mesh; container = document.getElementById( 'container' ); camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 1100 ); scene = new THREE.Scene(); scene.add( camera ); texture_placeholder = document.createElement( 'canvas' );
texture_placeholder.width = 128;
texture_placeholder.height = 128; var context = texture_placeholder.getContext( '2d' );
context.fillStyle = 'rgb( 200, 200, 200 )';
context.fillRect( 0, 0, texture_placeholder.width, texture_placeholder.height ); var materials = [ loadTexture( 'images/textures/cube/skybox/px.jpg' ), // right
loadTexture( 'images/textures/cube/skybox/nx.jpg' ), // left
loadTexture( 'images/textures/cube/skybox/py.jpg' ), // top
loadTexture( 'images/textures/cube/skybox/ny.jpg' ), // bottom
loadTexture( 'images/textures/cube/skybox/pz.jpg' ), // back
loadTexture( 'images/textures/cube/skybox/nz.jpg' ) // front ]; mesh = new THREE.Mesh( new THREE.CubeGeometry( 300, 300, 300, 7, 7, 7, materials ), new THREE.MeshFaceMaterial() );
mesh.scale.x = - 1;
scene.add( mesh ); renderer = new THREE.CanvasRenderer();
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( 'mousewheel', onDocumentMouseWheel, false ); document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false ); } function loadTexture( path ) { var texture = new THREE.Texture( texture_placeholder );
var material = new THREE.MeshBasicMaterial( { map: texture, overdraw: true } ); var image = new Image();
image.onload = function () { texture.needsUpdate = true;
material.map.image = this; render(); };
image.src = path; return material; } function onDocumentMouseDown( event ) { event.preventDefault(); isUserInteracting = true; onPointerDownPointerX = event.clientX;
onPointerDownPointerY = event.clientY; onPointerDownLon = lon;
onPointerDownLat = lat; } function onDocumentMouseMove( event ) { if ( isUserInteracting ) { lon = ( onPointerDownPointerX - event.clientX ) * 0.1 onPointerDownLon;
lat = ( event.clientY - onPointerDownPointerY ) * 0.1 onPointerDownLat;
render(); }
} function onDocumentMouseUp( event ) { isUserInteracting = false;
render(); } function onDocumentMouseWheel( event ) { camera.fov -= event.wheelDeltaY * 0.05;
camera.updateProjectionMatrix(); render(); }
function onDocumentTouchStart( event ) { if ( event.touches.length == 1 ) { event.preventDefault(); onPointerDownPointerX = event.touches[ 0 ].pageX;
onPointerDownPointerY = event.touches[ 0 ].pageY; onPointerDownLon = lon;
onPointerDownLat = lat; } } function onDocumentTouchMove( event ) { if ( event.touches.length == 1 ) { event.preventDefault(); lon = ( onPointerDownPointerX - event.touches[0].pageX ) * 0.1 onPointerDownLon;
lat = ( event.touches[0].pageY - onPointerDownPointerY ) * 0.1 onPointerDownLat; render(); } } function render() { lat = Math.max( - 85, Math.min( 85, lat ) );
phi = ( 90 - lat ) * Math.PI / 180;
theta = lon * Math.PI / 180; target.x = 500 * Math.sin( phi ) * Math.cos( theta );
target.y = 500 * Math.cos( phi );
target.z = 500 * Math.sin( phi ) * Math.sin( theta ); camera.lookAt( target ); renderer.render( scene, camera ); }
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