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="
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margin: 0;
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overflow: hidden;
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background: #fff;
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width: 100%;
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height: 100%;
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position: absolute;
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top: 0;
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">
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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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Cesium.Ion.defaultAccessToken =
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"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3ZjQ5ZGUzNC1jNWYwLTQ1ZTMtYmNjYS05YTY4ZTVmN2I2MDkiLCJpZCI6MTE3MTM4LCJpYXQiOjE2NzY0NDUyODB9.ZaNSBIfc1sGLhQd_xqhiSsc0yr8oS0wt1hAo9gbke6M";
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const viewer = new Cesium.Viewer("map", {
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contextOptions: {
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requestWebgl1: true,
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},
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});
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viewer.scene.debugShowFramesPerSecond = true;
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function map_common_addDatasouce(datasouceName) {
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let datasouce = viewer.dataSources._dataSources.find(t => {
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return t && t.name == datasouceName;
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});
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if (!datasouce) {
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datasouce = new Cesium.CustomDataSource(datasouceName);
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viewer.dataSources.add(datasouce);
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}
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return datasouce;
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}
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/*
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动态墙材质
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color 颜色
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duration 持续时间 毫秒
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trailImage 贴图地址
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*/
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function DynamicWallMaterialProperty(options) {
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this._definitionChanged = new Cesium.Event();
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this._color = undefined;
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this._colorSubscription = undefined;
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this.color = options.color || Color.BLUE;
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this.duration = options.duration || 1000;
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this.trailImage = options.trailImage;
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this._time = (new Date()).getTime();
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}
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/**
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* 带方向的墙体
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* @param {*} options.get:true/false
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* @param {*} options.count:数量
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* @param {*} options.freely:vertical/standard
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* @param {*} options.direction:+/-
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*/
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function _getDirectionWallShader(options) {
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if (options && options.get) {
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var materail = "czm_material czm_getMaterial(czm_materialInput materialInput)\n\
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{\n\
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czm_material material = czm_getDefaultMaterial(materialInput);\n\
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vec2 st = materialInput.st;";
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if (options.freely == "vertical") { //（由下到上）
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materail += "vec4 colorImage = texture2D(image, vec2(fract(st.s), fract(float(" + options.count + ")*st.t" + options.direction + " time)));\n\ ";
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} else { //（逆时针）
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materail += "vec4 colorImage = texture2D(image, vec2(fract(float(" + options.count + ")*st.s " + options.direction + " time), fract(st.t)));\n\ ";
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}
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//泛光
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materail += "vec4 fragColor;\n\
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fragColor.rgb = (colorImage.rgb+color.rgb) / 1.0;\n\
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fragColor = czm_gammaCorrect(fragColor);\n\
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material.diffuse = colorImage.rgb;\n\
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material.alpha = colorImage.a;\n\
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material.emission = fragColor.rgb;\n\
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return material;\n\
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}";
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return materail
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}
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}
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Object.defineProperties(DynamicWallMaterialProperty.prototype, {
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isConstant: {
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get: function () {
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return false;
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}
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},
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definitionChanged: {
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get: function () {
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return this._definitionChanged;
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}
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},
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color: Cesium.createPropertyDescriptor('color')
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});
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var MaterialType = 'wallType' + parseInt(Math.random() * 1000);
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DynamicWallMaterialProperty.prototype.getType = function (time) {
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return MaterialType;
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};
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DynamicWallMaterialProperty.prototype.getValue = function (time, result) {
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if (!Cesium.defined(result)) {
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result = {};
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}
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result.color = Cesium.Property.getValueOrClonedDefault(this._color, time, Cesium.Color.WHITE, result.color);
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result.image = this.trailImage;
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if (this.duration) {
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result.time = (((new Date()).getTime() - this._time) % this.duration) / this.duration;
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}
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viewer.scene.requestRender();
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return result;
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};
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DynamicWallMaterialProperty.prototype.equals = function (other) {
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return this === other ||
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(other instanceof DynamicWallMaterialProperty
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&& Cesium.Property.equals(this._color, other._color))
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};
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Cesium.Material._materialCache.addMaterial(MaterialType, {
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fabric: {
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type: MaterialType,
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uniforms: {
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color: new Cesium.Color(1.0, 0.0, 0.0, 0.8),
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image: Cesium.Material.DefaultImageId,
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time: -20
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},
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source: _getDirectionWallShader({
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get: true,
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count: 23.0,
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freely: 'standard',
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direction: '+'
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})
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},
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translucent: function (material) {
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return true;
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}
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});
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Cesium.DynamicWallMaterialProperty = DynamicWallMaterialProperty;
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//加载范围
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function loadWall() {
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let data = [
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[
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104.0185546875,
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30.66235300961486
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],
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[
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104.01589393615723,
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30.65652022496456
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],
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[
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104.029541015625,
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30.65053940942565
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],
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[
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104.0397548675537,
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30.65777541087788
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],
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[
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104.03829574584961,
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30.66604446357028
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],
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[
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104.0255069732666,
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30.667963963897005
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],
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[
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104.0185546875,
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30.66235300961486
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]
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]
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let coor = Array.prototype.concat.apply(
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[],
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data
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);
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let datasouce = map_common_addDatasouce('wall');
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datasouce.entities.add({
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wall: {
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positions: Cesium.Cartesian3.fromDegreesArray(coor),
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positions: Cesium.Cartesian3.fromDegreesArray(coor),
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maximumHeights: new Array(data.length).fill(200),
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minimunHeights: new Array(data.length).fill(0),
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// 动态
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material: new Cesium.DynamicWallMaterialProperty({ trailImage: "./jt.png", color: Cesium.Color.YELLOW, duration: 1500 })
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},
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});
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}
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loadWall();
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//设置相机位置及方向
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viewer.camera.flyTo({
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destination: Cesium.Cartesian3.fromDegrees(104.02, 30.655, 5000),
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duration: 2,
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});
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</script>
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</body>
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</html>
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