three.js是JavaScript编写的WebGL第三方库。提供了非常多的3D显示功能。
//使用到的JS库： three.min.js CSS3DRenderer.js
//设置相机
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);//设置场景
scene = new THREE.Scene();//设置3D空间的6个面，通过pano2vr直接将鱼眼全景图生成立体空间的六个面；也可通过Photoshop或其他的专业3D建模工具，将鱼眼图贴到3D球面上，再将球面转为立方面，获得立体空间的六个面。
var sides = [{
url: 'assets/images/posx.jpg',
position: [-512, 0, 0],
rotation: [0, Math.PI / 2, 0]
}, {
url: 'assets/images/negx.jpg',
position: [512, 0, 0],
rotation: [0, -Math.PI / 2, 0]
}, {
url: 'assets/images/posy.jpg',
position: [0, 512, 0],
rotation: [Math.PI / 2, 0, Math.PI]
}, {
url: 'assets/images/negy.jpg',
position: [0, -512, 0],
rotation: [-Math.PI / 2, 0, Math.PI]
}, {
url: 'assets/images/posz.jpg',
position: [0, 0, 512],
rotation: [0, Math.PI, 0]
}, {
url: 'assets/images/negz.jpg',
position: [0, 0, -512],
rotation: [0, 0, 0]
}];//将定义好的6各面添加到空间中,并为每个空间指定ID
for (var i = 0; i < sides.length; i++) {
var side = sides[i];
var element = document.createElement('section');
element.id = 'section_'+i;
var imgElement = document.createElement('img');
imgElement.width = 1026; // 2 pixels extra to close the gap.
imgElement.src = side.url;
element.appendChild(imgElement);
var object = new THREE.CSS3DObject(element);
object.position.fromArray(side.position);
object.rotation.fromArray(side.rotation);
scene.add(object);
}//设置渲染器
renderer = new THREE.CSS3DRenderer();//定义渲染器
renderer.setSize(window.innerWidth, window.innerHeight);//设置尺寸
document.body.appendChild(renderer.domElement);//将场景加入页面//实时渲染
function animate() {
requestAnimationFrame(animate);
//lon = Math.max(-180, Math.min(180, lon));//限制固定角度内旋转
//lon += 0.1;//自动旋转
lon += 0;
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);
}//为每个面构建空间的图标物件
function addIcon(){
var imgIcon = document.createElement('img');
imgIcon.src = '../static/img/arrow_right.png';
imgIcon.classList.add('icon');
document.getElementById('section_4').appendChild(imgIcon);
}
addIcon();//监听触摸事件
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;
}现在还在该尝试基本上使用，但在性能优化，细节完善上和功能上面还继续打磨。