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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2025-06-07 11:30:00 +00:00
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"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiIyMjBhMzcxMC0wNjBiLTRmYjItYjY1MC0wMzAwMzMyMGUyMmEiLCJpZCI6MzAzNzc3LCJpYXQiOjE3NDc2Mzk0NTV9.E_90aKtVdzRGlU2z48VwJ4mWvl-uuDkfQBCOO6zbzn4";
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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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viewer.scene.debugShowFramesPerSecond = true;
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viewer.scene.globe.depthTestAgainstTerrain = true;
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function radarPrimitiveMaterialProperty(option) {
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this.opts = {
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color: Cesium.Color.RED,
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duration: 2000,
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time: new Date().getTime(),
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repeat: 30,
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offset: 0,
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thickness: 0.3,
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};
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this.opts = Object.assign(this.opts, option);
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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 = this.opts.color;
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this.duration = this.opts.duration;
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this._time = this.opts.time;
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}
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Object.defineProperties(radarPrimitiveMaterialProperty.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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radarPrimitiveMaterialProperty.prototype.getType = function (time) {
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return "radarPrimitive";
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};
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radarPrimitiveMaterialProperty.prototype.getValue = function (
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time,
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result
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) {
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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(
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this._color,
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time,
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Cesium.Color.WHITE,
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result.color
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);
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result.time =
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((new Date().getTime() - this._time) % this.duration) /
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this.duration /
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10;
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result.repeat = this.opts.repeat;
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result.offset = this.opts.offset;
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result.thickness = this.opts.thickness;
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return result;
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};
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radarPrimitiveMaterialProperty.prototype.equals = function (other) {
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return (
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this === other ||
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(other instanceof radarPrimitiveMaterialProperty &&
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Property.equals(this._color, other._color))
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);
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};
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Cesium.radarPrimitiveMaterialProperty = radarPrimitiveMaterialProperty;
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Cesium.Material.radarPrimitiveType = "radarPrimitive";
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Cesium.Material.radarPrimitiveSource =
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"uniform vec4 color;\n\
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uniform float repeat;\n\
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uniform float offset;\n\
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uniform float thickness;\n\
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czm_material czm_getMaterial(czm_materialInput materialInput){\n\
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czm_material material = czm_getDefaultMaterial(materialInput);\n\
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float sp = 1.0/repeat;\n\
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vec2 st = materialInput.st;\n\
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float dis = distance(st, vec2(0.5));\n\
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float m = mod(dis + offset-time, sp);\n\
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float a = step(sp*(1.0-thickness), m); \n\
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material.diffuse = color.rgb;\n\
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material.alpha = a * color.a;\n\
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return material;\n\
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}";
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Cesium.Material._materialCache.addMaterial(
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Cesium.Material.radarPrimitiveType,
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{
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fabric: {
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type: Cesium.Material.radarPrimitiveType,
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uniforms: {
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color: new Cesium.Color(1.0, 0.0, 0.0, 0.5),
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// image: Cesium.Material.radarPrimitiveImage,
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time: 0,
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repeat: 30,
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offset: 0,
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thickness: 0.3,
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},
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source: Cesium.Material.radarPrimitiveSource,
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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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);
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var position = Cesium.Cartesian3.fromDegrees(114, 35, 750000.0);
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var heading = Cesium.Math.toRadians(135);
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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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//创建圆锥实体
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var cylinder = viewer.entities.add({
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name: "Red cone",
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position: Cesium.Cartesian3.fromDegrees(114, 35, 500000.0),
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orientation: orientation,
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cylinder: {
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length: 500000,
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topRadius: 0,
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bottomRadius: 50000,
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topSurface: true, //新增参数，控制顶部是否渲染
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bottomSurface: true, //新增参数，控制底部是否渲染
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material: new Cesium.radarPrimitiveMaterialProperty({
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color: Cesium.Color.CORAL,
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thickness: 0.1,
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}),
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},
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});
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viewer.zoomTo(cylinder);
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</script>
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</body>
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</html>
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