2025-03-11 08:25:45 +00:00
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<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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2025-03-19 03:00:22 +00:00
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<link rel="stylesheet" href="./../../libs/cesium/Cesium1.98/Widgets/widgets.css">
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<script type="text/javascript" src="./../../libs/cesium/Cesium1.98/Cesium.js"></script>
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2025-03-11 08:25:45 +00:00
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</head>
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<body style="margin: 0; overflow: hidden; background: #fff; width: 100%; height: 100%; position: absolute; top: 0">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<script type="text/javascript">
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2025-05-18 11:30:00 +00:00
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJjM2EzNGJmNy02N2RmLTQ0MDMtYjI2MS1hZTJiMTIwZGYwMTYiLCJpZCI6MzA0MzEyLCJpYXQiOjE3NDc3MjM3MTV9.ePQNhuoVuDsi_z00lTm5W26wyW1Adcr1AWetGM6WSXI'
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2025-03-11 08:25:45 +00:00
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const viewer = new Cesium.Viewer('map', {});
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// 开启帧率
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viewer.scene.debugShowFramesPerSecond = true;
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let start = new Cesium.JulianDate.fromDate(new Date());
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// 开始时间 cesium用的JulianDate:代表天文朱利安时间,用的是世界协调时,比北京时间晚8个小时, 加上东8时，就是当前的真正时间
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start = Cesium.JulianDate.addHours(start, 1, new Cesium.JulianDate());
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const stop = Cesium.JulianDate.addSeconds(start, 100, new Cesium.JulianDate());
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// 设置时钟范围
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viewer.clock.startTime = start.clone();
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viewer.clock.stopTime = stop.clone();
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viewer.clock.currentTime = start.clone();
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// 循环结束时后续动作
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viewer.clock.clockRange = 2;
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// 时间速率控制速度，时间调快多少倍，比如原来用时360秒，调整10倍后，现在用时36秒
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viewer.clock.multiplier = 5;
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//给下方时间线设置边界
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viewer.timeline.zoomTo(start, stop);
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viewer.scene.globe.depthTestAgainstTerrain = true;
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const position = new Cesium.SampledPositionProperty();
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// 跑道
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const startPos = Cesium.Cartesian3.fromDegrees(126.382821, 35.005608, 50);
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// 跑道2
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// const startPos = Cesium.Cartesian3.fromDegrees(126.382911, 34.976625, 5.1);
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// 终点
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const endPos = Cesium.Cartesian3.fromDegrees(126.382911, 34.976614, 5);
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position.addSample(start, startPos);
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position.addSample(stop, endPos);
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const entity = viewer.entities.add({
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// 将实体availability设置为与模拟时间相同的时间间隔。
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availability: new Cesium.TimeIntervalCollection([new Cesium.TimeInterval({
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start: start,
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stop: stop
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})]),
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position: position, // 计算实体位置属性
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// 基于位置移动自动计算方向.
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orientation: new Cesium.VelocityOrientationProperty(position),
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model: {
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uri: './models/737/scene.gltf',
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scale: 0.25,
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},
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});
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// 开启运动
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viewer.clock.shouldAnimate = true;
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// 第三人称
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viewer.trackedEntity = entity;
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// 第一人称
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// viewer.scene.preUpdate.addEventListener(traceHandler)
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// https://blog.csdn.net/dandan__666/article/details/115293860
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// https://blog.csdn.net/AllBluefm/article/details/137928976
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function traceHandler() {
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let center = entity.position.getValue(
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viewer.clock.currentTime
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);
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let orientation = entity.orientation.getValue(
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viewer.clock.currentTime
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)
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let transform = Cesium.Transforms.eastNorthUpToFixedFrame(center);
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transform = Cesium.Matrix4.fromRotationTranslation(Cesium.Matrix3.fromQuaternion(orientation), center);
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viewer.camera.lookAtTransform(transform, new Cesium.Cartesian3(-90, 0, 50))
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}
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//火焰特效
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class FireEffect {
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constructor(viewer, obj) {
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this.viewer = viewer
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this.viewModel = {
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emissionRate: 5,
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gravity: 0.0,//设置重力参数
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minimumParticleLife: 1,
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maximumParticleLife: 6,
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minimumSpeed: 1.0,//粒子发射的最小速度
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maximumSpeed: 4.0,//粒子发射的最大速度
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startScale: 0.0,
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endScale: 10.0,
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particleSize: 25.0,
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}
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this.emitterModelMatrix = new Cesium.Matrix4()
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this.translation = new Cesium.Cartesian3()
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this.rotation = new Cesium.Quaternion()
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this.hpr = new Cesium.HeadingPitchRoll()
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this.trs = new Cesium.TranslationRotationScale()
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this.scene = this.viewer.scene
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this.particleSystem = ''
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this.entity = this.viewer.entities.add({
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//选择粒子放置的坐标
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position: Cesium.Cartesian3.fromDegrees(
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obj.lng, obj.lat
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),
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});
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this.init();
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}
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init() {
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const _this = this
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this.viewer.clock.shouldAnimate = true;
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this.viewer.scene.globe.depthTestAgainstTerrain = false;
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// this.viewer.trackedEntity = this.entity;
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var particleSystem = this.scene.primitives.add(
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new Cesium.ParticleSystem({
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image: './fire.png',//生成所需粒子的图片路径
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//粒子在生命周期开始时的颜色
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startColor: new Cesium.Color(1, 1, 1, 1),
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//粒子在生命周期结束时的颜色
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endColor: new Cesium.Color(0.5, 0, 0, 0),
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//粒子在生命周期开始时初始比例
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startScale: _this.viewModel.startScale,
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//粒子在生命周期结束时比例
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endScale: _this.viewModel.endScale,
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//粒子发射的最小速度
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minimumParticleLife: _this.viewModel.minimumParticleLife,
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//粒子发射的最大速度
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maximumParticleLife: _this.viewModel.maximumParticleLife,
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//粒子质量的最小界限
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minimumSpeed: _this.viewModel.minimumSpeed,
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//粒子质量的最大界限
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maximumSpeed: _this.viewModel.maximumSpeed,
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//以像素为单位缩放粒子图像尺寸
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imageSize: new Cesium.Cartesian2(
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_this.viewModel.particleSize,
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_this.viewModel.particleSize
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),
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//每秒发射的粒子数
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emissionRate: _this.viewModel.emissionRate,
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//粒子系统发射粒子的时间（秒）
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lifetime: 16.0,
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//粒子系统是否应该在完成时循环其爆发
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loop: true,
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//设置粒子的大小是否以米或像素为单位
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sizeInMeters: true,
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//系统的粒子发射器
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emitter: new Cesium.ConeEmitter(Cesium.Math.toRadians(45.0)),//BoxEmitter 盒形发射器，ConeEmitter 锥形发射器，SphereEmitter 球形发射器，CircleEmitter圆形发射器
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})
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);
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this.particleSystem = particleSystem;
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this.preUpdateEvent()
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}
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//场景渲染事件
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preUpdateEvent() {
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let _this = this;
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this.viewer.scene.preUpdate.addEventListener(function (scene, time) {
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//发射器地理位置
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_this.particleSystem.modelMatrix = _this.computeModelMatrix(_this.entity, time);
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//发射器局部位置
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_this.particleSystem.emitterModelMatrix = _this.computeEmitterModelMatrix();
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// 将发射器旋转
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if (_this.viewModel.spin) {
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_this.viewModel.heading += 1.0;
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_this.viewModel.pitch += 1.0;
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_this.viewModel.roll += 1.0;
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}
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});
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}
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computeModelMatrix(entity, time) {
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return entity.computeModelMatrix(time, new Cesium.Matrix4());
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}
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computeEmitterModelMatrix() {
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this.hpr = Cesium.HeadingPitchRoll.fromDegrees(0.0, 0.0, 0.0, this.hpr);
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this.trs.translation = Cesium.Cartesian3.fromElements(
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-4.0,
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0.0,
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1.4,
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this.translation
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);
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this.trs.rotation = Cesium.Quaternion.fromHeadingPitchRoll(this.hpr, this.rotation);
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return Cesium.Matrix4.fromTranslationRotationScale(
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this.trs,
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this.emitterModelMatrix
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);
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}
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removeEvent() {
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this.viewer.scene.preUpdate.removeEventListener(this.preUpdateEvent, this);
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this.emitterModelMatrix = undefined;
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this.translation = undefined;
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this.rotation = undefined;
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this.hpr = undefined;
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this.trs = undefined;
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}
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//移除粒子特效
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remove() {
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() => { return this.removeEvent() }; //清除事件
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this.viewer.scene.primitives.remove(this.particleSystem); //删除粒子对象
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this.viewer.entities.remove(this.entity); //删除entity
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}
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}
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// setTimeout(() => {
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// new FireEffect(viewer, {
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// lng: 126.382931,
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// lat: 34.976515,
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// })
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// }, 9500);
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addPlane();
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function addPlane() {
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var position = Cesium.Cartesian3.fromDegrees(126.382931, 34.976515, 1.0);
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var heading = Cesium.Math.toRadians(90);
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var pitch = Cesium.Math.toRadians(0);
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var roll = Cesium.Math.toRadians(0);
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var hpr = new Cesium.HeadingPitchRoll(heading, pitch, roll);
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var orientation = Cesium.Transforms.headingPitchRollQuaternion(
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position,
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hpr
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);
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var entity = viewer.entities.add({
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position: position,
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orientation: orientation,
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model: {
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uri: './models/wall/scene.gltf',
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scale: 7,
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}
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});
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}
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</script>
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</body>
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</html>
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