three.js 创建一个在线720度全景展示效果
先看效果，可直接在线运行看效果
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>BFW NEW PAGE</title>
<script id="bfwone" data="dep=three&err=0" type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/bfwone.js"></script>
<style>
body {
background-color: #000000;
margin: 0;
cursor: move;
overflow: hidden;
}
.surface {
width: 1026px;
height: 1026px;
background-size: cover;
position: absolute;
}
.surface .bg {
position: absolute;
width: 1026px;
height: 1026px;
}
.m {
width: 200px;
padding: 20px;
position: fixed;
z-index: 999;
font-weight: bold;
color: #FFFFFF;
}
</style>
</head>
<body>
<div class="m">
720度全景展示
</div>
<div>
<div id="surface_0" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/posx.jpg" alt="">
</div>
<div id="surface_1" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/negx.jpg" alt="">
</div>
<div id="surface_2" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/posy.jpg" alt="">
</div>
<div id="surface_3" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/negy.jpg" alt="">
</div>
<div id="surface_4" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/posz.jpg" alt="">
</div>
<div id="surface_5" class="surface">
<img class="bg" src="http://editor.bfw.wiki/bfwrepo/image/negz.jpg" alt="">
</div>
</div>
<script type="text/javascript">
var camera, scene, renderer;
var geometry, material, mesh;
var target;
var lon = 90,
lat = 0;
var phi = 0,
theta = 0;
var touchX, touchY;
bready(function() {
use(['CSS3DRenderer.min'], function() {
target = new THREE.Vector3();
init();
animate();
});
});
function init() {
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 1000);
scene = new THREE.Scene();
var sides = [{
position: [-512,
0,
0],
rotation: [0,
Math.PI / 2,
0]
},
{
position: [512,
0,
0],
rotation: [0,
-Math.PI / 2,
0]
},
{
position: [0,
512,
0],
rotation: [Math.PI / 2,
0,
Math.PI]
},
{
position: [0,
-512,
0],
rotation: [-Math.PI / 2,
0,
Math.PI]
},
{
position: [0,
0,
512],
rotation: [0,
Math.PI,
0]
},
{
position: [0,
0,
-512],
rotation: [0,
0,
0]
}];
for (var i = 0; i < sides.length; i++) {
var side = sides[i];
var element = document.getElementById("surface_" + i);
element.width = 1026;
var object = new THREE.CSS3DObject(element);
object.position.fromArray(side.position);
object.rotation.fromArray(side.rotation);
scene.add(object);
}
renderer = new THREE.CSS3DRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
document.addEventListener('mousedown', onDocumentMouseDown, false);
document.addEventListener('wheel', onDocumentMouseWheel, false);
document.addEventListener('touchstart', onDocumentTouchStart, false);
document.addEventListener('touchmove', onDocumentTouchMove, false);
window.addEventListener('resize', onWindowResize, false);
}
function animate() {
requestAnimationFrame(animate);
lat = Math.max(-85, Math.min(85, lat));
phi = THREE.Math.degToRad(90 - lat);
theta = THREE.Math.degToRad(lon);
target.x = Math.sin(phi) * Math.cos(theta);
target.y = Math.cos(phi);
target.z = Math.sin(phi) * Math.sin(theta);
camera.lookAt(target);
renderer.render(scene, camera);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function onDocumentMouseDown(event) {
event.preventDefault();
document.addEventListener('mousemove', onDocumentMouseMove, false);
document.addEventListener('mouseup', onDocumentMouseUp, false);
}
function onDocumentMouseMove(event) {
var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;
lon -= movementX * 0.1;
lat += movementY * 0.1;
}
function onDocumentMouseUp(event) {
document.removeEventListener('mousemove', onDocumentMouseMove);
document.removeEventListener('mouseup', onDocumentMouseUp);
}
function onDocumentMouseWheel(event) {
camera.fov += event.deltaY * 0.05;
camera.updateProjectionMatrix();
}
function onDocumentTouchStart(event) {
event.preventDefault();
var touch = event.touches[0];
touchX = touch.screenX;
touchY = touch.screenY;
}
function onDocumentTouchMove(event) {
event.preventDefault();
var touch = event.touches[0];
lon -= (touch.screenX - touchX) * 0.1;
lat += (touch.screenY - touchY) * 0.1;
touchX = touch.screenX;
touchY = touch.screenY;
}
</script>
</body>
</html>
原理就是利用three.js 将6个面的照片进行合成渲染，然后利用鼠标事件进行视图控制，具体步骤就是1、创建场景
scene = new THREE.Scene();
2、创建透视相机
camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 1100 );
3、创建画布
texture_placeholder = document.createElement( 'canvas' );
4.创建立方体网格模型、渲染器
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