首先我们来看下要实现的效果
这个缩小后的图片, 下面我们来看下近距离的动态效果..
效果比较简陋, 需要后期再处理...
下面进入主题, 代码篇..
HTML 部分:
- <!DOCTYPE HTML>
- <HTML lang="en">
- <head>
- <meta charset="UTF-8">
- <title>
- 全球航班
- </title>
- <style>
- HTML{overflow: hidden;} body { margin: 0;}
- </style>
- <script src="js/jquery.min.js">
- </script>
- </head>
- <body>
- <!-- 地国 -->
- <div id="zh_globe_container">
- </div>
- <!-- 容器 -->
- <script src="js/threejs/Detector.js">
- </script>
- <!-- webGL 浏览器支持检测 -->
- <script src="js/threejs/three.min.js">
- </script>
- <!-- 核心 js -->
- <script src="js/threejs/stats.min.js">
- </script>
- <!-- 性能测试 -->
- <script src="js/threejs/OrbitControls.js">
- </script>
- <!-- 地球控制 -->
- <script src="js/socketio-1.4.5.js">
- </script>
- <!-- socket -->
- <script src="js/globe.js">
- </script>
- <!-- -->
- </body>
- </HTML>
Web 前端开发学习 Q-q-u-n: 731771211, 分享学习的方法和需要注意的小细节, 不停更新最新的教程和学习方法 (详细的前端项目实战教学视频, PDF)
JS 部分 (globe.JS)
1, 实现地球
地球贴图 (可以在网上下载)
- // 地球
- function globe() {
- var globeTextureLoader = new THREE.TextureLoader();
- globeTextureLoader.load('images/textures/earth.jpg', function (texture) {
- var globeGgeometry = new THREE.SphereGeometry(200, 100, 100);
- var globeMaterial = new THREE.MeshStandardMaterial({map: texture});
- var globeMesh = new THREE.Mesh(globeGgeometry, globeMaterial);
- group.add(globeMesh);
- group.rotation.x = THREE.Math.degToRad(35);
- group.rotation.y = THREE.Math.degToRad(170);
- });
- }
2, 添加球面光源 (这里使用的是半球光)
- // 光
- function lights() {
- var hemisphereLight = new THREE.HemisphereLight(0xffffff, 0x333333, 2);
- hemisphereLight.position.x = 0;
- hemisphereLight.position.y = 0;
- hemisphereLight.position.z = -200;
- group.add(hemisphereLight);
- }
3, 添加星点
- // 星点
- function stars() {
- var starsGeometry = new THREE.Geometry();
- for (var i = 0; i <2000; i ++) {
- var starVector = new THREE.Vector3(
- THREE.Math.randFloatSpread(2000),
- THREE.Math.randFloatSpread(2000),
- THREE.Math.randFloatSpread(2000)
- );
- starsGeometry.vertices.push(starVector);
- }
- var starsMaterial = new THREE.PointsMaterial({color: 0x888888})
- var starsPoint = new THREE.Points(starsGeometry, starsMaterial);
- group.add(starsPoint);
- }
4, 添加飞机
这里需要我们把 经纬度坐标 转成 xyz 坐标
- // 获取 position
- function getPosition(lng, lat, alt) {
- var phi = (90-lat)*(Math.PI/180),
- theta = (lng+180)*(Math.PI/180),
- radius = alt+200,
- x = -(radius * Math.sin(phi) * Math.cos(theta)),
- z = (radius * Math.sin(phi) * Math.sin(theta)),
- y = (radius * Math.cos(phi));
- return {x: x, y: y, z: z};
- }
画飞机
- // 飞机形状 (不想画的, 可以下载个 飞机模型 使用加载器加载进来)
- var planeShape = new THREE.Shape();
- planeShape.moveTo( 0, 0);
- planeShape.lineTo(0.2, -0.2);
- planeShape.lineTo(0.2, -1.3);
- planeShape.lineTo(1.6,-2.7);
- planeShape.lineTo(1.6,-3);
- planeShape.lineTo(0.2, -2.1);
- planeShape.lineTo(0.2, -3);
- planeShape.lineTo(0.5, -3.4);
- planeShape.lineTo(0.5, -3.7);
- planeShape.lineTo(0, -3.3);
- planeShape.lineTo(-0.5, -3.7);
- planeShape.lineTo(-0.5, -3.4);
- planeShape.lineTo(-0.2, -3);
- planeShape.lineTo(-0.2, -2.1);
- planeShape.lineTo(-1.6,-3);
- planeShape.lineTo(-1.6,-2.7);
- planeShape.lineTo(-0.2, -1.3);
- planeShape.lineTo(-0.2, -0.2);
- var planeGeometry = new THREE.ShapeGeometry(planeShape);
- // 飞机材质
- var planeMaterial = new THREE.MeshPhongMaterial({
- color: 0x0FB4DD, side: THREE.DoubleSide, depthTest: true
- });
Web 前端开发学习 Q-q-u-n: 731771211, 分享学习的方法和需要注意的小细节, 不停更新最新的教程和学习方法 (详细的前端项目实战教学视频, PDF)
depthTest 作用是能否透过球体看到飞机, 如果是 false 则旋转到球体另一面也能看到飞机
添加飞机
- // 添加飞机
- function addPlane(item) {
- if(item.anum && item.lng && item.lat) {
- var plane = new THREE.Mesh(planeGeometry, planeMaterial);
- // 旋转
- plane.rotation.z = THREE.Math.degToRad(item.ang);
- // 定位
- var position = getPosition(item.lng, item.lat, 5);
- plane.position.set(position.x, position.y, position.z);
- // 显示 / 隐藏
- // plane.visible = false;
- // 保存
- planeMarkers[item.anum] = plane;
- // 添加到场景
- group.add(plane);
- // 绘制历史轨迹
- drawHistoryTrack(item.anum);
- }
- }
绘制轨迹 (使用 socket 来获取的飞行轨迹经纬度坐标点)
- // 时间段
- var curTime = Date.parse(new Date())/1000;
- var depTime = curTime - 30*60;
- // 轨迹线质
- var trackMaterial = new THREE.LineBasicMaterial({color : 0x1B94B1});
- // 绘制历史轨迹
- function drawHistoryTrack(anum) {
- socket.emit("fullPath", anum, depTime, curTime, function(status, data){
- if(status) {
- var dLength = data.length;
- if(dLength>=2) {
- var trackCoordArr = [];
- for(var i=0; i<dLength; i++) {
- if(data[i].lng && data[i].alt) {
- trackCoordArr.push({lng: data[i].lng, lat: data[i].lat});
- }
- }
- var tcaLength = trackCoordArr.length;
- if(tcaLength>=2) {
- var tcaHalfLength = Math.ceil(tcaLength/2),
- vertexArr = [];
- // 这里只取了三个点 (起点, 中点, 终点)
- var p1 = getPosition(trackCoordArr[0].lng, trackCoordArr[0].lat, 0),
- p2 = getPosition(trackCoordArr[tcaHalfLength].lng, trackCoordArr[tcaHalfLength].lat, tcaLength*0.01),
- p3 = getPosition(trackCoordArr[tcaLength-1].lng, trackCoordArr[tcaLength-1].lat, 0);
- var trackCurve = new THREE.CatmullRomCurve3([
- new THREE.Vector3(p1.x, p1.y, p1.z),
- new THREE.Vector3(p2.x, p2.y, p2.z),
- new THREE.Vector3(p3.x, p3.y, p3.z)
- ]);
- var trackGeometry = new THREE.Geometry(),
- verticesArr = trackCurve.getPoints(tcaLength);
- trackGeometry.vertices = verticesArr;
- var trackLine = new THREE.Line(trackGeometry, trackMaterial);
- group.add(trackLine);
- // 动画点
- addLightPoint(p1, tcaLength, verticesArr);
- }
- }
- }
- });
- }
如果要绘制所有点, 且头尾是在球面上的曲线, 则需要两次循环
- var tcaRemainLength = tcaLength-tcaHalfLength
- for(var j=0; j<tcaHalfLength; j++) { // 前一半
- var p1 = getPosition(trackCoordArr[j].lng, trackCoordArr[j].lat, j*0.05);
- vertexArr.push(new THREE.Vector3(p1.x, p1.y, p1.z));
- }
- for(var k=tcaRemainLength; k>0; k--) { // 后一半
- var p2 = getPosition(trackCoordArr[tcaLength-k].lng, trackCoordArr[tcaLength-k].lat, k*0.05);
- vertexArr.push(new THREE.Vector3(p2.x, p2.y, p2.z));
- }
- var trackCurve = new THREE.CatmullRomCurve3(vertexArr);
这个部分看看就行了..
光点动画
- // 点动画
- var pointGeometry = new THREE.SphereGeometry(0.2, 20, 20);
- var pointMaterial = new THREE.MeshBasicMaterial({color: 0x40E0D0});
- function addLightPoint(pos, coordsNum ,verArr) {
- var pointMesh = new THREE.Mesh(pointGeometry, pointMaterial);
- pointMesh.position.set(pos.x, pos.y, pos.z);
- group.add(pointMesh);
- var index = 0;
- function pointAnimate() {
- index++;
- if(index>coordsNum) {
- index = 0;
- }
- pointMesh.position.set(verArr[index].x, verArr[index].y, verArr[index].z);
- requestAnimationFrame(pointAnimate);
- }
- pointAnimate();
- }
这个点使用的是 sphere,, 当然也可以用顶点来实现, 如下
- var geometry = new THREE.Geometry();
- geometry.vertices.push(new THREE.Vector3(0, 0, 0))
- geometry.colors.push(new THREE.Color(0xffffff));
- var material = new THREE.PointsMaterial({
- size: 1, vertexColors: THREE.VertexColors, opacity: 0.75, sizeAttenuation: true, transparent: true
- });
- var point = new THREE.Points(geometry, material);
- point.position.set(x, y, z);
- group.add(point);
另外不想用光点动画的话, 也可以用线动画, 实现原理是不断更新顶点坐标, 如下
- var curveGeometry = new THREE.Geometry();
- var curveData = new THREE.CatmullRomCurve3(verArr.slice(0, 10));
- curveGeometry.vertices = curveData.getPoints(10);
- var curveMaterial = new THREE.LineBasicMaterial({color: 0x40E0D0});
- var curveLine = new THREE.Line(curveGeometry, curveMaterial);
- group.add(curveLine);
- var index = 0;
- function lineAnimate() {
- index++;
- if(index>coordsNum-10) {
- index = 0;
- }
- var offsetData = verArr.slice(index, 10+index);
- if(offsetData.length> 0) {
- curveData = new THREE.CatmullRomCurve3(offsetData);
- curveLine.geometry.vertices = curveData.getPoints(10);
- curveLine.geometry.verticesNeedUpdate = true;
- }
- requestAnimationFrame(lineAnimate);
- }
- lineAnimate();
最后就是布置场景和事件了
- // 初始化
- function init() {
- container = document.getElementById('zh_globe_container');
- scene = new THREE.Scene();
- var bgTexture = new THREE.TextureLoader().load("images/textures/starfield.jpg");
- scene.background = bgTexture;
- camera = new THREE.PerspectiveCamera(50, winWth/winHgt, 1, 2000);
- camera.up.x = 0;
- camera.up.y = 1;
- camera.up.z = 0;
- camera.position.x = 0;
- camera.position.y = 0;
- camera.position.z = 400;
- camera.lookAt(0,0,0);
- group = new THREE.Group();
- scene.add(group);
- // 地球
- globe();
- // 飞机
- plane();
- // 星点
- stars();
- // 半球光
- lights();
- // 渲染器
- renderer = new THREE.WebGLRenderer({antialias: true, preserveDrawingBuffer: true});
- renderer.setPixelRatio(Windows.devicePixelRatio);
- renderer.setSize(winWth, winHgt);
- container.appendChild(renderer.domElement);
- // 盘旋控制
- var orbitControl = new THREE.OrbitControls(camera, renderer.domElement);
- orbitControl.minDistrance = 20;
- orbitControl.maxDistrance = 50;
- orbitControl.maxPolarAngle = Math.PI/2;
- // 性能测试
- stats = new Stats();
- container.appendChild(stats.dom);
- // resize 事件
- Windows.addEventListener('resize', onWindowResize, false);
- }
- // 窗口大小改变
- function onWindowResize() {
- camera.aspect = Windows.innerWidth/Windows.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize(Windows.innerWidth, Windows.innerHeight);
- }
- // 渲染
- function render() {
- group.rotation.y -= 0.0005;
- renderer.render(scene, camera);
- }
- // 动画
- function animate() {
- requestAnimationFrame(animate);
- render();
- stats.update();
- }
- init();
- animate();
完整代码:
Web 前端开发学习 Q-q-u-n: 731771211, 分享学习的方法和需要注意的小细节, 不停更新最新的教程和学习方法 (详细的前端项目实战教学视频, PDF)
- var log = console.log.bind(console);
- var globeObj = (function() {
- 'use strict';
- // 判断浏览器是否支持 webgl
- if(!Detector.webgl) Detector.addGetWebGLMessage();
- var container, stats;
- var camera, scene, renderer;
- var group;
- var mouseX = 0, mouseY = 0;
- var winWth = Windows.innerWidth, winHgt = Windows.innerHeight;
- // 获取 position
- function getPosition(lng, lat, alt) {
- var phi = (90-lat)*(Math.PI/180),
- theta = (lng+180)*(Math.PI/180),
- radius = alt+200,
- x = -(radius * Math.sin(phi) * Math.cos(theta)),
- z = (radius * Math.sin(phi) * Math.sin(theta)),
- y = (radius * Math.cos(phi));
- return {x: x, y: y, z: z};
- }
- // 飞机
- function plane() {
- var socket = io('https://loc.variflight.com/***** 此处接口地址不能给了', {transports: ['websocket']});
- var clientBounds = [52.793056,72.427908,2.970897,135.181814];
- // 连接
- socket.on('connect', function() {
- socket.emit("sub", clientBounds, -1, '', function(){});
- });
- // 飞机标记
- var planeMarkers = {};
- // 飞机形状
- var planeShape = new THREE.Shape();
- planeShape.moveTo( 0, 0);
- planeShape.lineTo(0.2, -0.2);
- planeShape.lineTo(0.2, -1.3);
- planeShape.lineTo(1.6,-2.7);
- planeShape.lineTo(1.6,-3);
- planeShape.lineTo(0.2, -2.1);
- planeShape.lineTo(0.2, -3);
- planeShape.lineTo(0.5, -3.4);
- planeShape.lineTo(0.5, -3.7);
- planeShape.lineTo(0, -3.3);
- planeShape.lineTo(-0.5, -3.7);
- planeShape.lineTo(-0.5, -3.4);
- planeShape.lineTo(-0.2, -3);
- planeShape.lineTo(-0.2, -2.1);
- planeShape.lineTo(-1.6,-3);
- planeShape.lineTo(-1.6,-2.7);
- planeShape.lineTo(-0.2, -1.3);
- planeShape.lineTo(-0.2, -0.2);
- var planeGeometry = new THREE.ShapeGeometry(planeShape);
- // 飞机材质
- var planeMaterial = new THREE.MeshPhongMaterial({color: 0x0FB4DD, side: THREE.DoubleSide, depthTest: true});
- // 添加飞机
- function addPlane(item) {
- if(item.anum && item.lng && item.lat) {
- var plane = new THREE.Mesh(planeGeometry, planeMaterial);
- // 旋转
- plane.rotation.z = THREE.Math.degToRad(item.ang);
- // 定位
- var position = getPosition(item.lng, item.lat, 5);
- plane.position.set(position.x, position.y, position.z);
- // 显示 / 隐藏
- // plane.visible = false;
- // 保存
- planeMarkers[item.anum] = plane;
- // 添加到场景
- group.add(plane);
- // 绘制历史轨迹
- drawHistoryTrack(item.anum);
- }
- }
- // 时间段
- var curTime = Date.parse(new Date())/1000;
- var depTime = curTime - 30*60;
- // 轨迹线质
- var trackMaterial = new THREE.LineBasicMaterial({color : 0x1B94B1});
- // 绘制历史轨迹
- function drawHistoryTrack(anum) {
- socket.emit("fullPath", anum, depTime, curTime, function(status, data){
- if(status) {
- var dLength = data.length;
- if(dLength>=2) {
- var trackCoordArr = [];
- for(var i=0; i<dLength; i++) {
- if(data[i].lng && data[i].alt) {
- trackCoordArr.push({lng: data[i].lng, lat: data[i].lat});
- }
- }
- var tcaLength = trackCoordArr.length;
- if(tcaLength>=2) {
- var tcaHalfLength = Math.ceil(tcaLength/2),
- tcaRemainLength = tcaLength-tcaHalfLength,
- vertexArr = [];
- /* 所有点
- for(var j=0; j<tcaHalfLength; j++) {
- var p1 = getPosition(trackCoordArr[j].lng, trackCoordArr[j].lat, j*0.05);
- vertexArr.push(new THREE.Vector3(p1.x, p1.y, p1.z));
- }
- for(var k=tcaRemainLength; k>0; k--) {
- var p2 = getPosition(trackCoordArr[tcaLength-k].lng, trackCoordArr[tcaLength-k].lat, k*0.05);
- vertexArr.push(new THREE.Vector3(p2.x, p2.y, p2.z));
- }
- var trackCurve = new THREE.CatmullRomCurve3(vertexArr);
- */
- // 三个点
- var p1 = getPosition(trackCoordArr[0].lng, trackCoordArr[0].lat, 0),
- p2 = getPosition(trackCoordArr[tcaHalfLength].lng, trackCoordArr[tcaHalfLength].lat, tcaLength*0.01),
- p3 = getPosition(trackCoordArr[tcaLength-1].lng, trackCoordArr[tcaLength-1].lat, 0);
- var trackCurve = new THREE.CatmullRomCurve3([
- new THREE.Vector3(p1.x, p1.y, p1.z),
- new THREE.Vector3(p2.x, p2.y, p2.z),
- new THREE.Vector3(p3.x, p3.y, p3.z)
- ]);
- var trackGeometry = new THREE.Geometry(),
- verticesArr = trackCurve.getPoints(tcaLength);
- trackGeometry.vertices = verticesArr;
- var trackLine = new THREE.Line(trackGeometry, trackMaterial);
- group.add(trackLine);
- // 动画点
- addLightPoint(p1, tcaLength, verticesArr);
- }
- }
- }
- });
- }
- // 点动画
- var pointGeometry = new THREE.SphereGeometry(0.2, 20, 20);
- var pointMaterial = new THREE.MeshBasicMaterial({color: 0x40E0D0});
- function addLightPoint(pos, coordsNum ,verArr) {
- var pointMesh = new THREE.Mesh(pointGeometry, pointMaterial);
- pointMesh.position.set(pos.x, pos.y, pos.z);
- group.add(pointMesh);
- var index = 0;
- function pointAnimate() {
- index++;
- if(index>coordsNum) {
- index = 0;
- }
- pointMesh.position.set(verArr[index].x, verArr[index].y, verArr[index].z);
- requestAnimationFrame(pointAnimate);
- }
- pointAnimate();
- /*var curveGeometry = new THREE.Geometry();
- var curveData = new THREE.CatmullRomCurve3(verArr.slice(0, 10));
- curveGeometry.vertices = curveData.getPoints(10);
- var curveMaterial = new THREE.LineBasicMaterial({color: 0x40E0D0});
- var curveLine = new THREE.Line(curveGeometry, curveMaterial);
- group.add(curveLine);
- var index = 0;
- function lineAnimate() {
- index++;
- if(index>coordsNum-10) {
- index = 0;
- }
- var offsetData = verArr.slice(index, 10+index);
- if(offsetData.length> 0) {
- curveData = new THREE.CatmullRomCurve3(offsetData);
- curveLine.geometry.vertices = curveData.getPoints(10);
- curveLine.geometry.verticesNeedUpdate = true;
- }
- requestAnimationFrame(lineAnimate);
- }
- lineAnimate();*/
- }
- // 监听数据 (添加并更新)
- socket.on('~', function(res) {
- if($.isEmptyObject(planeMarkers)) {
- $.each(res, function(i, item) {
- addPlane(item);
- });
- } else {
- $.each(res, function(i, item) {
- if(planeMarkers[item.anum]) {
- if(item.lng && item.lat) {
- var pos = getPosition(item.lng, item.lat, 5);
- planeMarkers[item.anum].position.set(pos.x, pos.y, pos.z);
- }
- } else {
- addPlane(item);
- }
- });
- }
- });
- }
- // 地球
- function globe() {
- var globeTextureLoader = new THREE.TextureLoader();
- globeTextureLoader.load('images/textures/earth.jpg', function (texture) {
- var globeGgeometry = new THREE.SphereGeometry(200, 100, 100);
- var globeMaterial = new THREE.MeshStandardMaterial({map: texture});
- var globeMesh = new THREE.Mesh(globeGgeometry, globeMaterial);
- group.add(globeMesh);
- group.rotation.x = THREE.Math.degToRad(35);
- group.rotation.y = THREE.Math.degToRad(170);
- });
- }
- // 星点
- function stars() {
- var starsGeometry = new THREE.Geometry();
- for (var i = 0; i < 2000; i ++) {
- var starVector = new THREE.Vector3(
- THREE.Math.randFloatSpread(2000),
- THREE.Math.randFloatSpread(2000),
- THREE.Math.randFloatSpread(2000)
- );
- starsGeometry.vertices.push(starVector);
- }
- var starsMaterial = new THREE.PointsMaterial({color: 0x888888})
- var starsPoint = new THREE.Points(starsGeometry, starsMaterial);
- group.add(starsPoint);
- }
- // 光
- function lights() {
- var hemisphereLight = new THREE.HemisphereLight(0xffffff, 0x333333, 2);
- hemisphereLight.position.x = 0;
- hemisphereLight.position.y = 0;
- hemisphereLight.position.z = -200;
- group.add(hemisphereLight);
- }
- // 初始化
- function init() {
- container = document.getElementById('zh_globe_container');
- scene = new THREE.Scene();
- var bgTexture = new THREE.TextureLoader().load("images/textures/starfield.jpg");
- scene.background = bgTexture;
- camera = new THREE.PerspectiveCamera(50, winWth/winHgt, 1, 2000);
- camera.up.x = 0;
- camera.up.y = 1;
- camera.up.z = 0;
- camera.position.x = 0;
- camera.position.y = 0;
- camera.position.z = 400;
- camera.lookAt(0,0,0);
- group = new THREE.Group();
- scene.add(group);
- // 地球
- globe();
- // 飞机
- plane();
- // 星点
- stars();
- // 半球光
- lights();
- // 渲染器
- renderer = new THREE.WebGLRenderer({antialias: true, preserveDrawingBuffer: true});
- renderer.setPixelRatio(Windows.devicePixelRatio);
- renderer.setSize(winWth, winHgt);
- container.appendChild(renderer.domElement);
- // 盘旋控制
- var orbitControl = new THREE.OrbitControls(camera, renderer.domElement);
- orbitControl.minDistrance = 20;
- orbitControl.maxDistrance = 50;
- orbitControl.maxPolarAngle = Math.PI/2;
- // 性能测试
- stats = new Stats();
- container.appendChild(stats.dom);
- // resize 事件
- Windows.addEventListener('resize', onWindowResize, false);
- }
- // 窗口大小改变
- function onWindowResize() {
- camera.aspect = Windows.innerWidth/Windows.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize(Windows.innerWidth, Windows.innerHeight);
- }
- // 渲染
- function render() {
- group.rotation.y -= 0.0005;
- renderer.render(scene, camera);
- }
- // 动画
- function animate() {
- requestAnimationFrame(animate);
- render();
- stats.update();
- }
- init();
- animate();
- })();
场景背景图
来源: http://www.jianshu.com/p/0e745dca1276