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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<script src="./jquery-1.8.3.min.js"></script>
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<style>
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input {
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position: absolute;
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top: 10px;
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left: 10px;
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}
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</style>
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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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<input type="range" min="0" id="inp" step="0.01" max="1" value="1">
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<script type="text/javascript">
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3ZjQ5ZGUzNC1jNWYwLTQ1ZTMtYmNjYS05YTY4ZTVmN2I2MDkiLCJpZCI6MTE3MTM4LCJpYXQiOjE2NzY0NDUyODB9.ZaNSBIfc1sGLhQd_xqhiSsc0yr8oS0wt1hAo9gbke6M'
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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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class undergroundmodes {
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constructor(option) {
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this.viewer = option.viewer;
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this.options = option;
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this.viewer = viewer;
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this.config = {
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enableCollisionDetection: false,
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NearFarScalar: new Cesium.NearFarScalar(500.0, 0.0, 1000.0, 1.0),
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translucencyEnabled: true,
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fadeByDistance: true,
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alpha: 0.1
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};
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this.config = Object.assign(this.config, this.options);
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this.config.ecd = this.viewer.scene.screenSpaceCameraController.enableCollisionDetection;
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//透明度
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var alpha = Number(this.options.alpha ? this.options.alpha : 0.5);
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alpha = !isNaN(alpha) ? alpha : 1.0;
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alpha = Cesium.Math.clamp(alpha, 0.0, 1.0);
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this.config.alpha = alpha;
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this.viewer.scene.screenSpaceCameraController.enableCollisionDetection = this.config.enableCollisionDetection;
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//地下模式展示的相机范围
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this.viewer.scene.globe.translucency.frontFaceAlphaByDistance = this.config.NearFarScalar;
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this.update();
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}
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update() {
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//半透明启用
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this.viewer.scene.globe.translucency.enabled = this.config.translucencyEnabled;
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//按距离淡入
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this.viewer.scene.globe.translucency.frontFaceAlphaByDistance.nearValue = this.config.alpha;
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this.viewer.scene.globe.translucency.frontFaceAlphaByDistance.farValue = this.config.fadeByDistance ?
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1.0 :
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this.config.alpha;
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}
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//改变半透明启用
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changeTranslucencyEnabled(enabled) {
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if (enabled != undefined) {
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this.config.translucencyEnabled = enabled;
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this.update();
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}
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}
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//改变是否按距离淡入
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changeFadeByDistance(fadeByDistance) {
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if (fadeByDistance != undefined) {
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this.config.fadeByDistance = fadeByDistance;
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this.update();
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}
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}
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//改变地表透明度
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changeAlpha(alpha) {
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if (alpha != undefined) {
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this.config.alpha = alpha;
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this.update();
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}
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}
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}
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var undergroundmode = new undergroundmodes({
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viewer: viewer
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});
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// 开启帧率
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viewer.scene.debugShowFramesPerSecond = true;
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// 加载单张图片
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var imageryProvider = new Cesium.SingleTileImageryProvider({
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"url": "./word.jpg",
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id: '1'
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})
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viewer.imageryLayers.addImageryProvider(imageryProvider)
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$("#inp").change(() => {
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let v = Number($("#inp").val());
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// // //改变半透明启用
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// undergroundmode.changeTranslucencyEnabled(true);
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// // //改变是否按距离淡入
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// undergroundmode.changeFadeByDistance(true);
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// // //改变地表透明度
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undergroundmode.changeAlpha(v);
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// 先把所有的影像图层的透明度设置为0
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viewer.imageryLayers._layers.forEach(layer => {
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layer.alpha = v;
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});
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viewer.scene.globe.baseColor = new Cesium.Color(0, 0, 0, 0);
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})
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</script>
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</body>
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</html>
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