网页3D显示实践
作者：互联网
系统中可能有产品的3D显示，Thress.js的例子如下：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>一个可以开门的机柜</title>
<style>
*{
margin:0;
padding:0;
text-decoration: none;
box-sizing: border-box;
}
ul,li{
list-style: none;
border:none;
}
.clear:after{
content:"";
display:block;
clear:both;
}
body{
overflow: hidden;
}
</style>
<!-- <script src="js/jquery-3.2.1.min.js"></script>-->
<!-- 引入3D库-->
<script src="js/three.js"></script>
<!-- 引入控制器-->
<script src="js/OrbitControls_alter.js"></script>
<!-- 引入动画库-->
<script src="js/tween.min.js"></script>
</head>
<body>
<script>
//添加场景
var scene = new THREE.Scene();
//添加坐标轴
scene.add(axes = new THREE.AxisHelper(100));
//配置相机
var camera;
function initCamera(){
camera = new THREE.PerspectiveCamera(45,window.innerWidth/window.innerHeight,0.1,2000);
camera.position.set(0,150,300);
// camera.lookAt({
// x : 0,
// y : 1000,
// z : 0
// });
}
initCamera();
//配置光源
var dircLight;
function initLight(){
dircLight = new THREE.DirectionalLight(0xffffff);
dircLight.position.set(300,400,200);
scene.add(dircLight);
scene.add(new THREE.AmbientLight(0x444444));
}
initLight();
//设置渲染器
var renderer;
function initRenderer(){
renderer = new THREE.WebGLRenderer({
antialias:true//抗锯齿:true
});
renderer.setSize(window.innerWidth,window.innerHeight);//画布尺寸
renderer.setClearColor('#39609B');//背景色
document.body.appendChild(renderer.domElement);
}
initRenderer();
//设置贴图
var floorTexture;//地板贴图
function initTexture(){
floorTexture = THREE.ImageUtils.loadTexture('img/floor.jpg', render);
floorTexture.wrapS = floorTexture.wrapT = THREE.RepeatWrapping;//两个方向都重复
floorTexture.repeat.set(14,10);//两个方向上的重复数
}
initTexture();
//floor
var floor;
function initFloor(){
var geometry = new THREE.BoxGeometry(400,2,300);
var material = new THREE.MeshLambertMaterial({
color:0xffffff,
map:floorTexture
});
floor = new THREE.Mesh(geometry,material);
floor.position.set(0,-1,0);
scene.add(floor);
}
initFloor();
//画机柜上的编号贴图
function canvasTxture(str){
var canvas = document.createElement("canvas");
canvas.width = 50;
canvas.height = 40;
var ctx = canvas.getContext("2d");
var g = ctx.createLinearGradient(0,0,50,40);
g.addColorStop(0,"#777");
g.addColorStop(1,"#777");
ctx.fillStyle = g;
ctx.fillRect(0,0,50,40);
ctx.textBaseline='top';
ctx.font="20px SimHei";
ctx.fillStyle = "#00ffff";//编号颜色
var txtWidth = ctx.measureText(str).width;
ctx.fillText(str ,50/2-txtWidth/2,40/2-20/2);
var texture = new THREE.Texture(canvas);
texture.needsUpdate = true;
return texture;
}
//机柜
//构造机柜:参数x坐标,z坐标,机柜号
function Cabient(x,z,cabNmb){
this.x=x;
this.z=z;
this.y=0;
this.number = cabNmb;
var dk = 30;//底宽
var dc = 40;//底长
//设置机箱的外壳
var texture1 = THREE.ImageUtils.loadTexture('img/rack_panel.jpg', {}, render);//机箱外表贴图
var texture3 = THREE.ImageUtils.loadTexture('img/cabz.jpg', {}, render);//cabz
var texture2 = THREE.ImageUtils.loadTexture('img/caby.jpg', {}, render);//caby
var cabGroup = new THREE.Group();
//cabGroup的平面中心是机柜主体的平面中心
cabGroup.position.set(this.x,this.y,this.z);
cabGroup.name = 'cabGroup';
var cabMatLambert = new THREE.MeshLambertMaterial({//设置朗伯材质和贴图
color:0x8E8E8E,
map:texture1
});
var cabMatBasic = new THREE.MeshBasicMaterial({//设置基础材质和贴图
color:0x8E8E8E,
map:texture1
});
var cabdGeo = new THREE.BoxGeometry(dk,2,dc);//箱主体底宽30，高2，长40
var cabd = new THREE.Mesh(cabdGeo,cabMatBasic);
cabd.position.set(0,1,0);
var cabzGeo = new THREE.BoxGeometry(2,88,dc);//箱左侧，厚2，高88，长40
var cabzMaterials = [];
cabzMaterials.push(//push顺序：X轴正、反，Y轴正、反，Z轴正、反
cabMatLambert,
cabMatLambert,
cabMatLambert,
cabMatLambert,
new THREE.MeshBasicMaterial({
color:0xBEBEBE,
map:texture2
}),
cabMatBasic
);
var cabzMat = new THREE.MeshFaceMaterial(cabzMaterials);
var cabz = new THREE.Mesh(cabzGeo,cabzMat);
cabz.position.set(dk/2-1,46,0);
var cabyGeo = new THREE.BoxGeometry(2,88,dc);//箱左侧，厚2，高88，长40
var cabyMaterials = [];
cabyMaterials.push(
cabMatLambert,
cabMatBasic,
cabMatLambert,
cabMatLambert,
new THREE.MeshBasicMaterial({
color:0xBEBEBE,
map:texture3
}),
cabMatBasic
);
var cabyMat = new THREE.MeshFaceMaterial(cabyMaterials);
var caby = new THREE.Mesh(cabyGeo,cabyMat);
caby.position.set(-dk/2+1,46,0);
var cabhGeo = new THREE.BoxGeometry(dk-4,88,2);//后板宽26，高88，厚2
var cabh = new THREE.Mesh(cabhGeo,cabMatBasic);
cabh.position.set(0,46,0-dc/2+1);
var cabsGeo = new THREE.BoxGeometry(dk,2,dc);
var cabsMaterials = [];
cabsMaterials.push(
cabMatBasic,
cabMatBasic,
new THREE.MeshLambertMaterial({
color:0x8E8E8E,
map:canvasTxture(this.number)//canvas贴图
}),
cabMatLambert,
cabMatLambert,
cabMatLambert
);
var cabsMat = new THREE.MeshFaceMaterial(cabsMaterials);
var cabs = new THREE.Mesh(cabsGeo,cabsMat);
cabs.position.set(0,91,0);
cabs.name = 'cabs';
cabGroup.add(cabd,cabz,caby,cabh,cabs);//cabGroup不包括机箱门
//设置机箱门
var menGroup = new THREE.Group();
menGroup.position.set(this.x+15,this.y,this.z+20);
menGroup.name = this.number;//机箱门的名字为输入的编号
var menGeo = new THREE.BoxGeometry(dk,92,1);//机箱们宽，高，厚
var mMaterials = [];
mMaterials.push(
new THREE.MeshLambertMaterial({color:0x999999}),
new THREE.MeshLambertMaterial({color:0x999999}),
new THREE.MeshLambertMaterial({color:0x999999}),
new THREE.MeshLambertMaterial({color:0x999999}),
new THREE.MeshLambertMaterial({
map:THREE.ImageUtils.loadTexture(
'img/rack_front_door.jpg',
{},
render
),
overdraw:true
}),
new THREE.MeshBasicMaterial({
map:THREE.ImageUtils.loadTexture(
'img/rack_door_back.jpg',
{},
render
),
overdraw:true
})
);
var menMat = new THREE.MeshFaceMaterial(mMaterials);
var men = new THREE.Mesh(menGeo,menMat);
men.name='men';
men.position.set(-dk/2,46,.5);
menGroup.add(men);
scene.add(cabGroup,menGroup);
}
var cab1= new Cabient(50,50,'1A01');
// 可以继续添加机柜
// var cab2 = new Cabient(-100,100,'1A02');
// var cab3 = new Cabient(-100,-100,'1B01');
//构造服务器。参数：所属机柜（如cab1）,高度坐标
function Server(obj,h){
this.x = obj.x;
this.z = obj.z;
this.y = 0;
this.h = h;
var serv2Group = new THREE.Group();
serv2Group.position.set(this.x ,this.y,this.z);
//两层的服务器
var servTexture = THREE.ImageUtils.loadTexture('img/rack_inside.jpg', {}, render);
var serv2Geo = new THREE.BoxGeometry(24,3.5,36);//这里服务器的尺寸要跟机箱尺寸对应好
var servMat = new THREE.MeshBasicMaterial({
color:0x9AC0CD,
map:servTexture
});
var server2 = new THREE.Mesh(serv2Geo,servMat);//服务器主体
server2.position.set(0,this.h,2);
var server2mGeo = new THREE.BoxGeometry(26.4,4,0.2);//服务器面板尺寸
var smb2Materials = [];
smb2Materials.push(
new THREE.MeshBasicMaterial({color:0xffffff}),
new THREE.MeshBasicMaterial({color:0xffffff}),
new THREE.MeshBasicMaterial({color:0xffffff}),
new THREE.MeshBasicMaterial({color:0xffffff}),
new THREE.MeshBasicMaterial({
map:THREE.ImageUtils.loadTexture(
'img/server2.jpg',
{},
render
),
overdraw:true
}),
new THREE.MeshBasicMaterial({color:0xffffff})
);
var server2mMat = new THREE.MeshFaceMaterial(smb2Materials);//服务器面板材质
var server2face = new THREE.Mesh(server2mGeo,server2mMat );
server2face.name= 'ctr2';
server2face.position.set(0,this.h,36/2+0.2/2+2);
serv2Group.add(server2,server2face);
scene.add(serv2Group);
}
// 往机柜里加个服务器
var server1 = new Server(cab1,50);// 突然发现高度好像没对应好，懒，不想算了
// 往机柜里加个构造交换机
function Switchboard(obj,h){
this.x = obj.x;
this.z = obj.z;
this.h = h;
var switchGroup = new THREE.Group();
switchGroup.position.set(this.x ,0,this.z);
var switchTexture = THREE.ImageUtils.loadTexture('img/rack_inside.jpg', {}, render);
var switchGeo = new THREE.BoxGeometry(24,11.5,36);//交换机主体尺寸，宽厚长，要跟机箱对应
var switchMat = new THREE.MeshBasicMaterial({
color:0x9AC0CD,
map:switchTexture
});
var switchBody = new THREE.Mesh(switchGeo,switchMat);
switchBody.position.set(0,this.h,2);
var switchmGeo = new THREE.BoxGeometry(26.4,12,0.2);//交换机面板尺寸
var switchmMat = new THREE.MeshBasicMaterial({//交换机面板材质
color:0xffffff
});
var switchfMaterials = [];
switchfMaterials.push(
switchmMat,
switchmMat,
switchmMat,
switchmMat,
new THREE.MeshBasicMaterial({
map:THREE.ImageUtils.loadTexture(
'img/switchboard.jpg',
{},
render
),
overdraw:true
}),
switchmMat
);
var switchfMat = new THREE.MeshFaceMaterial(switchfMaterials);//交换机面板材质
var switchface = new THREE.Mesh(switchmGeo,switchfMat);
switchface.position.set(0,this.h,36/2+0.2/2+2);
switchGroup.add(switchBody,switchface);
scene.add(switchGroup);
}
var switchboard11 = new Switchboard(cab1,30);
document.addEventListener('dblclick', onDocumentMouseDown, false);
function onDocumentMouseDown(event) {
event.preventDefault();
//1、先基于我们在屏幕上点击的位置创建一个向量
var vector = new THREE.Vector3(
(event.clientX / window.innerWidth ) * 2 - 1,
-( event.clientY / window.innerHeight ) * 2 + 1,
0.5
);
//2、然后用unproject函数将点击位置转换成Thres.js场景中的坐标
vector = vector.unproject(camera);
//3、用THREE.Raycaster对象向点击位置发射光线
var raycaster = new THREE.Raycaster(camera.position, vector.sub(camera.position).normalize());
//4、计算射线相机到的对象，可能有多个对象，因此返回的是一个数组，按离相机远近排列
//将射线投影到屏幕，如果scene.children里的某个或多个形状相交，则返回这些形状
//第二个参数是设置是否递归，默认是false，也就是不递归。当scene里面添加了Group对象的实例时，就需要设置这个参数为true
//第一个参数不传scene.children也可以，传一个group.children或一个形状数组都可以（这样可以实现一些特别的效果如点击内部的效果）
//另外，因为返回的是一个数组，所以遍历数组就可以获得所有相交的对象，当元素重叠时，特别有用
var intersects = raycaster.intersectObjects(scene.children,true);
var currObj = intersects[0].object;//currObj为点击到的第一个对象
//如果这个对象是门
//如果门是关闭的
//那么打开，并且移动摄像机位置
//如果门是打开的
//那么关闭
if(currObj.name=='men'){
// console.log(currObj.parent.name);//currObj.parent是menGroup
var p1=new THREE.Vector3(currObj.parent.position);//
var number = currObj.parent.name;
if(currObj.parent.rotation.y == 0){
new TWEEN.Tween( currObj.parent.rotation ).to({
y: .6*Math.PI
}, 1500 ).easing( TWEEN.Easing.Elastic.Out).start();
// console.log(currObj.parent.position);
controls.target=new THREE.Vector3(
currObj.parent.position.x,
currObj.parent.position.y+50,
currObj.parent.position.z
);
//移动相机的位置(有动画)，但是有个问题还不知怎么解决
// new TWEEN.Tween( camera.position ).to({
// x:currObj.parent.position.x-15,
// y:currObj.parent.position.y+100,
// z:currObj.parent.position.z+130
// }, 500 ).start();
camera.position.set(
currObj.parent.position.x+15,
currObj.parent.position.y+100,
currObj.parent.position.z+130
);
}else{
new TWEEN.Tween( currObj.parent.rotation ).to({
y: 0
}, 300 ).start();
}
controls.update();
}
if(currObj.name=='ctr2'){
console.log(currObj.parent.position.z);
var p1=new THREE.Vector3(currObj.parent.position);//
if(currObj.parent.position.z == 50){
new TWEEN.Tween( currObj.parent.position ).to({
z:currObj.parent.position.z+20
}, 500 ).easing( TWEEN.Easing.Elastic.Out).start();
// console.log(currObj.parent.position);
}else{
new TWEEN.Tween( currObj.parent.position ).to({
z:currObj.parent.position.z-20
}, 500 ).easing( TWEEN.Easing.Elastic.Out).start();
}
controls.update();
}
render();
}
//视角控制器
var controls;
function ctr(){
controls = new THREE.OrbitControls(camera);
controls.addEventListener('change',render);
//相机到原点的最远距离
controls.maxDistance = 2000;
}
ctr();
function render(){
TWEEN.update();
renderer.render(scene,camera);
}
render();
function animate() {
requestAnimationFrame(animate);
render();
}
animate();
function onResize() {
// aspect表示屏幕长宽比
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
// 浏览器变化时画布自适应
window.addEventListener('resize', onResize, false);
</script>
</body>
</html>
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标签：currObj,网页,parent,THREE,实践,position,var,new,3D 来源： https://www.cnblogs.com/shiningleo007/p/16657339.html