伏龙阁资源网

three.js绘制地球、飞机与轨迹的效果示例
站长资源 2024/11/28 佚名
2 0

对于three.js不太熟悉的朋友们可以参考这篇文章，threejs官网：https://threejs.org/

首先我们来看下要实现的效果

three.js绘制地球、飞机与轨迹的效果示例

这个缩小后的图片，下面我们来看下近距离的动态效果。。

three.js绘制地球、飞机与轨迹的效果示例

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="/UploadFiles/2021-04-02/jquery.min.js">


JS部分(globe.js)


1、实现地球




地球贴图(可以在网上下载)


three.js绘制地球、飞机与轨迹的效果示例





// 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});





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(window.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
 window.addEventListener('resize', onWindowResize, false);
}

// 窗口大小改变
function onWindowResize() {
 camera.aspect = window.innerWidth/window.innerHeight;
 camera.updateProjectionMatrix();
 renderer.setSize(window.innerWidth, window.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：





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 = window.innerWidth, winHgt = window.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(window.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
 window.addEventListener('resize', onWindowResize, false);
 }

 // 窗口大小改变
 function onWindowResize() {
 camera.aspect = window.innerWidth/window.innerHeight;
 camera.updateProjectionMatrix();
 renderer.setSize(window.innerWidth, window.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


three.js绘制地球、飞机与轨迹的效果示例


总结


以上就是关于利用three.js绘制地球、飞机、轨迹的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流。
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除！
www.wwsws.com 伏龙阁资源网
39,976影音资源
44,792技术资源
21,817软件资源
651,128站长资源

P70系列延期，华为新旗舰将在下月发布

3月20日消息，近期博主@数码闲聊站 透露，原定三月份发布的华为新旗舰P70系列延期发布，预计4月份上市。

而博主@定焦数码 爆料，华为的P70系列在定位上已经超过了Mate60，成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢？

根据目前爆料的消息来看，华为P70系列将推出三个版本，其中P70和P70 Pro采用了三角形的摄像头模组设计，而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智，但辨识度绝对拉满。

更新日志

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接