449 lines
16 KiB
HTML
449 lines
16 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<!-- Use correct character set. -->
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<meta charset="utf-8">
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<!-- Tell IE to use the latest, best version. -->
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<!-- Make the application on mobile take up the full browser screen and disable user scaling. -->
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
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<title>Learning Cesium!</title>
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<script src="./Build/Cesium/Cesium.js"></script>
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<style>
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@import url(./Build/Cesium/Widgets/widgets.css);
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html, body, #cesiumContainer {
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width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden;
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}
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.backdrop {
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display: inline-block;
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background: rgba(42, 42, 42, 0.7);
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border-radius: 5px;
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border: 1px solid #444;
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padding: 5px 10px;
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color: #fff;
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line-height: 150%;
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font-size: small;
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}
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#heightSliderLabel, #heightValue {
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vertical-align: top;
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}
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.backdrop a:link, .backdrop a:visited, .backdrop a:hover {
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color: #fff
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}
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.loadingIndicator {
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display: none;
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position: absolute;
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top: 50%;
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left: 50%;
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margin-top: -33px;
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margin-left: -33px;
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width: 66px;
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height: 66px;
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background: url(Source/Images/ajax-loader.gif) center no-repeat;
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}
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.cover {
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display: none;
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position: absolute;
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background-color: rgba(0, 0, 0, 0.75);
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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}
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#menu {
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position: absolute;
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left: 10px;
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top: 10px;
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}
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.nowrap {
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white-space: nowrap;
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}
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html, body, #cesiumContainer {
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width: 100%;
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height: 100%;
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margin: 0;
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padding: 0;
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overflow: hidden;
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font-family: sans-serif;
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background: #000;
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}
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button.cesium-infoBox-camera {
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display: none;
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}
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#3DTiles {
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padding-top: 10px;
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}
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</style>
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</head>
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<body>
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<div id="cesiumContainer"></div>
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<!-- Some input elements for our app. -->
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<div class="backdrop" id="menu">
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<h2>Sample NYC Geocaches</h2>
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<span><strong>Camera Mode</strong></span>
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<div class="nowrap">
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<input id="freeMode" name="source" type="radio" checked/>
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<label for="freeMode">Free</label>
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</div>
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<div class="nowrap">
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<input id="droneMode" name="source" type="radio"/>
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<label for="droneMode">Drone View</label>
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</div>
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<br>
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<span><strong>3d Tile Styling</strong></span>
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<div class="nowrap">
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<select id="tileStyle">
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<option value="none">None</option>
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<option value="height">Height</option>
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<option value="transparent">Transparent</option>
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</select>
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</div>
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<br>
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<span><strong>Display Options</strong></span>
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<div class="nowrap">
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<input id="shadows" type="checkbox"/>
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<label for="shadows">Shadows</label>
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</div>
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<div class="nowrap">
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<input id="neighborhoods" type="checkbox" checked/>
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<label for="neighborhoods">Neighborhoods</label>
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</div>
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<br>
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</div>
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<div id="loadingIndicator" class="cover">
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<div id="loadingIcon" class="loadingIndicator"></div>
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</div>
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<script>
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI5ZjRjNTZkNC01NDYxLTRhMjQtOGEwZC1kZjA3YzQ5YTJlZDkiLCJpZCI6MjYwODQsInNjb3BlcyI6WyJhc3IiLCJnYyJdLCJpYXQiOjE1ODcxOTMwODN9.prGsSKyAW_9Ow5zHYPhbm3LsQL-ApQw5-5PNJkDaHi8';
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var viewer = new Cesium.Viewer('cesiumContainer',{
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scene3DOnly: true,
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selectionIndicator: false,
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baseLayerPicker: false
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});
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// 移除默认的底图
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viewer.imageryLayers.remove(viewer.imageryLayers.get(0));
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// 添加哨兵影像 Sentinel-2 imagery
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viewer.imageryLayers.addImageryProvider(new Cesium.IonImageryProvider({ assetId : 3954 }));
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viewer.terrainProvider = Cesium.createWorldTerrain({
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requestWaterMask : true, // required for water effects
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requestVertexNormals : true // required for terrain lighting
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});
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// 确保地形后面的物体能够被正确遮挡
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viewer.scene.globe.depthTestAgainstTerrain = true;
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// 使场景中的灯光随着时间的变化而变化。如果你缩小，你会看到地球的那部分是黑暗的，因为太阳已经在那部分落下了。
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viewer.scene.globe.enableLighting = true;
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// Create an initial camera view
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var initialPosition = new Cesium.Cartesian3.fromDegrees(-73.998114468289017509, 40.674512895646692812, 2631.082799425431);
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var initialOrientation = new Cesium.HeadingPitchRoll.fromDegrees(7.1077496389876024807, -31.987223091598949054, 0.025883251314954971306);
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var homeCameraView = {
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destination : initialPosition,
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orientation : {
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heading : initialOrientation.heading,
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pitch : initialOrientation.pitch,
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roll : initialOrientation.roll
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}
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};
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// Set the initial view
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viewer.scene.camera.setView(homeCameraView);
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// Add some camera flight animation options
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homeCameraView.duration = 2.0;
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homeCameraView.maximumHeight = 2000;
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homeCameraView.pitchAdjustHeight = 2000;
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homeCameraView.endTransform = Cesium.Matrix4.IDENTITY;
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// 覆盖 homeButton 的点击事件
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viewer.homeButton.viewModel.command.beforeExecute.addEventListener(function (e) {
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e.cancel = true;
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viewer.scene.camera.flyTo(homeCameraView);
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});
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// Set up clock and timeline.
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viewer.clock.shouldAnimate = true; // make the animation play when the viewer starts
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viewer.clock.startTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:00:00Z");
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viewer.clock.stopTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:20:00Z");
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viewer.clock.currentTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:00:00Z");
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viewer.clock.multiplier = 2; // sets a speedup
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viewer.clock.clockStep = Cesium.ClockStep.SYSTEM_CLOCK_MULTIPLIER; // tick computation mode
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viewer.clock.clockRange = Cesium.ClockRange.LOOP_STOP; // loop at the end
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viewer.timeline.zoomTo(viewer.clock.startTime, viewer.clock.stopTime); // set visible range
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/*
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Cesium 中对KML的支持还不是很完善，但实现了大部分标准和Google的gx扩展命名空间。
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Cesium 提供KmlDataSource 类来解析 KML和KMZ数据；
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配置项中 camera 和 canvas 是必需的；
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KmlDataSource 实例的 load 方法是异步的，返回一个 Promise 实例对象，
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可在请求完成后的 then 方法后处理加载的数据源
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*/
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var kmlOptions = {
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camera : viewer.scene.camera,
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canvas : viewer.scene.canvas,
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clampToGround : true//使得实体贴合地形,而不是弯曲的WGS84椭球面
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};
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var geocachePromise = Cesium.KmlDataSource.load('SampleData/sampleGeocacheLocations.kml', kmlOptions);
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// Add geocache billboard entities to scene and style them
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geocachePromise.then(function(dataSource) {
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// 将数据源中的数据作为实体添加到 viewer 实例中
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viewer.dataSources.add(dataSource);
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// 获取实体数组
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var geocacheEntities = dataSource.entities.values;
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for (var i = 0; i < geocacheEntities.length; i++) {
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var entity = geocacheEntities[i];
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if (Cesium.defined(entity.billboard)) {
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// Entity styling code here
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// 调整实体垂直方向上的位置,使其于地形贴合,不至于被地形遮挡
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entity.billboard.verticalOrigin = Cesium.VerticalOrigin.BOTTOM;
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// 取消显示标注
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entity.label = undefined;
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// 添加可见范围
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entity.billboard.distanceDisplayCondition = new Cesium.DistanceDisplayCondition(10.0, 20000.0);
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// 转换坐标,将实体的位置坐标 Cartesian3 转成经纬度 Cartographic ,用于显示
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var cartographicPosition = Cesium.Cartographic.fromCartesian(entity.position.getValue(Cesium.JulianDate.now()));
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// 将弧度制转成度
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var longitude = Cesium.Math.toDegrees(cartographicPosition.longitude);
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var latitude = Cesium.Math.toDegrees(cartographicPosition.latitude);
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// 修改实体描述
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var description = '<table class="cesium-infoBox-defaultTable cesium-infoBox-defaultTable-lighter"><tbody>' +
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'<tr><th>' + "Longitude" + '</th><td>' + longitude.toFixed(5) + '</td></tr>' +
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'<tr><th>' + "Latitude" + '</th><td>' + latitude.toFixed(5) + '</td></tr>' +
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'<tr><th>' + "JulianDate" + '</th><td>' + Cesium.JulianDate.now() + '</td></tr>' +
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// '<tr><th>' + "entity.position" + '</th><td>' + entity.position.getValue(Cesium.JulianDate.now()) + '</td></tr>' +
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// '<tr><th>' + "fromDate" + '</th><td>' + entity.position.getValue(Cesium.JulianDate.fromDate(new Date("2019-12-12"))) + '</td></tr>' +
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// '<tr><th>' + "cartographicPosition.latitude" + '</th><td>' + cartographicPosition.latitude + '</td></tr>' +
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'</tbody></table>';
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entity.description = description;
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}
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}
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});
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/**
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* 加载 GeoJson 数据
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* 使用 GeoJsonDataSource 类解析 GeoJson 数据
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*/
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var geojsonOptions = {
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clampToGround : true //贴合地形
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};
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// 加载geojson格式的社区数据
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var neighborhoodsPromise = Cesium.GeoJsonDataSource.load('SampleData/sampleNeighborhoods.geojson', geojsonOptions);
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// 用于保存添加的实体集合
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var neighborhoods;
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neighborhoodsPromise.then(function(dataSource) {
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// 将请求获得的数据添加到 viewer 中
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viewer.dataSources.add(dataSource);
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neighborhoods = dataSource.entities;
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// 获取实体数组
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var neighborhoodEntities = dataSource.entities.values;
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for (var i = 0; i < neighborhoodEntities.length; i++) {
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var entity = neighborhoodEntities[i];
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if (Cesium.defined(entity.polygon)) {
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// Cesium 将 GeoJson 的属性数据存储在实体的properties 属性中
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entity.name = entity.properties.neighborhood;
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// 使用随机颜色样式作为填充材料.
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entity.polygon.material = Cesium.Color.fromRandom({
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red : 0.1,
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maximumGreen : 0.5,
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minimumBlue : 0.5,
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alpha : 0.6
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});
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// Tells the polygon to color the terrain.
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//ClassificationType.CESIUM_3D_TILE will color the 3D tileset, and ClassificationType.BOTH will color both the 3d tiles and terrain (BOTH is the default)
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entity.polygon.classificationType = Cesium.ClassificationType.TERRAIN;
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// 获取面的位置坐标信息
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var polyPositions = entity.polygon.hierarchy.getValue(Cesium.JulianDate.now()).positions;
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var polyCenter = Cesium.BoundingSphere.fromPoints(polyPositions).center; //获取面的中心点
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polyCenter = Cesium.Ellipsoid.WGS84.scaleToGeodeticSurface(polyCenter);
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entity.position = polyCenter;
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// Generate labels
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entity.label = {
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text : entity.name,
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showBackground : true,//指定标签背景的可见性。
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scale : 0.6,//原图像的比例
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horizontalOrigin : Cesium.HorizontalOrigin.CENTER,//水平对齐方式
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verticalOrigin : Cesium.VerticalOrigin.BOTTOM,//垂直对齐方式
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distanceDisplayCondition : new Cesium.DistanceDisplayCondition(10.0, 8000.0),//设置于 Camera 距离的显示范围
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disableDepthTestDistance : 100.0
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};
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}
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}
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});
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/**
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* 加载飞机模型
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* 1、CZML数据，将时间动态图形加载进来，设置 clock 将时间于时态数据对齐
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* 2、获取数据源中的轨迹移动点，绑定模型
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*/
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// Load a drone flight path from a CZML file
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var dronePromise = Cesium.CzmlDataSource.load('SampleData/sampleFlight.czml');
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var drone;
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dronePromise.then(function(dataSource) {
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viewer.dataSources.add(dataSource);
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// Get the entity using the id defined in the CZML data
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drone = dataSource.entities.getById('Aircraft/Aircraft1');
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// 挂载 3维模型
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drone.model = {
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uri : 'SampleData/Models/CesiumDrone.gltf',
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minimumPixelSize : 128,
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maximumScale : 1000,
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silhouetteColor : Cesium.Color.WHITE,
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silhouetteSize : 2
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};
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// VelocityOrientationProperty 会在时间上向前和向后采样的实体的位置，自动计算实体的方向
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drone.orientation = new Cesium.VelocityOrientationProperty(drone.position);
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// 对实体的位置 position 进行插值,平滑路径轨迹
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drone.position.setInterpolationOptions({
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interpolationDegree : 3,
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interpolationAlgorithm : Cesium.HermitePolynomialApproximation
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});
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});
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/**
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* 加载 3D Tile 数据
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* Cesium 提供 Cesium3DTileset 类来解析 3D Tile 数据
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*
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*/
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//加载 Cesium Ion 中的纽约市的3D模型
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var city = viewer.scene.primitives.add(new Cesium.Cesium3DTileset({ url: Cesium.IonResource.fromAssetId(75343) }));
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var defaultStyle = new Cesium.Cesium3DTileStyle({
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color : "color('white')",
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show : true
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});
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var transparentStyle = new Cesium.Cesium3DTileStyle({
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color : "color('white', 0.3)",
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show : true
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});
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var heightStyle = new Cesium.Cesium3DTileStyle({
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color : {
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//根据要素属性值进行条件渲染
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conditions : [
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["${Height} >= 300", "rgba(45, 0, 75, 0.5)"],
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["${Height} >= 200", "rgb(102, 71, 151)"],
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["${Height} >= 100", "rgb(170, 162, 204)"],
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["${Height} >= 50", "rgb(224, 226, 238)"],
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["${Height} >= 25", "rgb(252, 230, 200)"],
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["${Height} >= 10", "rgb(248, 176, 87)"],
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["${Height} >= 5", "rgb(198, 106, 11)"],
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["true", "rgb(127, 59, 8)"]
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]
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}
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});
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city.style = heightStyle;
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//绑定样式切换事件
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var tileStyle = document.getElementById('tileStyle');
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function set3DTileStyle() {
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var selectedStyle = tileStyle.options[tileStyle.selectedIndex].value;
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if (selectedStyle === 'none') {
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city.style = defaultStyle;
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} else if (selectedStyle === 'height') {
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city.style = heightStyle;
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} else if (selectedStyle === 'transparent') {
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city.style = transparentStyle;
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}
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}
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tileStyle.addEventListener('change', set3DTileStyle);
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/**
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* 事件交互
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* 通过 Scene.pick/Scene.drillPick/Globe.pick 可以获取鼠标点击的位置下的实体。
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*
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* 事件处理：
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* 通过 ScreenSpaceEventHandler 类处理用户输入事件。
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* 构造器：new Cesium.ScreenSpaceEventHandler(element)
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* 主要方法：
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* setInputAction(action, type, modifier)
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* action；事件回调函数
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* type：事件类型，可选值参考https://cesium.com/docs/cesiumjs-ref-doc/ScreenSpaceEventType.html
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* 常用 Cesium.ScreenSpaceEventType.LEFT_CLICK（鼠标左键单击）
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* Cesium.ScreenSpaceEventType.MOUSE_MOVE（鼠标移动）
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*/
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var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
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var previousPickedEntity = undefined;
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handler.setInputAction(function(movement) {
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var pickedPrimitive = viewer.scene.pick(movement.endPosition);
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var pickedEntity = (Cesium.defined(pickedPrimitive)) ? pickedPrimitive.id : undefined;
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// 取消高亮的实体
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if (Cesium.defined(previousPickedEntity)) {
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previousPickedEntity.billboard.scale = 1.0;
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previousPickedEntity.billboard.color = Cesium.Color.WHITE;
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}
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// 高亮当前鼠标下的实体
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if (Cesium.defined(pickedEntity) && Cesium.defined(pickedEntity.billboard)) {
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pickedEntity.billboard.scale = 2.0;
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pickedEntity.billboard.color = Cesium.Color.ORANGERED;
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previousPickedEntity = pickedEntity;
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}
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}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
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/**
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* 控制 相机 模式
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* viewer.trackedEntity :视角追踪实体的位置
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*/
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var freeModeElement = document.getElementById('freeMode');
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var droneModeElement = document.getElementById('droneMode');
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// Create a follow camera by tracking the drone entity
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function setViewMode() {
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if (droneModeElement.checked) {
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viewer.trackedEntity = drone;
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} else {
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viewer.trackedEntity = undefined;
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viewer.scene.camera.flyTo(homeCameraView);
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}
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}
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freeModeElement.addEventListener('change', setViewMode);
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droneModeElement.addEventListener('change', setViewMode);
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viewer.trackedEntityChanged.addEventListener(function() {
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if (viewer.trackedEntity === drone) {
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freeModeElement.checked = false;
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droneModeElement.checked = true;
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}
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});
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//-----------------------------------------------------------
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var neighborhoodsElement = document.getElementById('neighborhoods');
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neighborhoodsElement.addEventListener('change', function (e) {
|
||
neighborhoods.show = e.target.checked;
|
||
});
|
||
|
||
var loadingIndicator = document.getElementById('loadingIndicator');
|
||
loadingIndicator.style.display = 'block';
|
||
city.readyPromise.then(function () {
|
||
loadingIndicator.style.display = 'none';
|
||
});
|
||
|
||
</script>
|
||
</body>
|
||
</html>
|