前言
缺少前置学习使用资料，请自行查阅：[https://blog.csdn.net/weixin_44402694/article/details/123110136](https://blog.csdn.net/weixin_44402694/article/details/123110136)
以下示例使用到的公共静态资料，不建议下载，建议官网自行下载超图Build资源，示例所涉及图片会在示例使用到时提供出来。如有需要可下载：[https://download.csdn.net/download/weixin_44402694/82180350](https://download.csdn.net/download/weixin_44402694/82180350)。
绘制特效线段（发光｜指定颜色｜带边框｜指定颜色箭头｜虚线｜动态线）。
使用
效果
完整代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绘制特效线 - 流动等</title>
<link href="./public/Build/Cesium/Widgets/widgets.css" rel="stylesheet" />
<script
type="text/javascript"
src="./public/Build/Cesium/Cesium.js"
></script>
<style>
* {
margin: 0;
padding: 0;
}
html,
body,
#cesium-container {
width: 100%;
height: 100%;
}
.panel {
position: fixed;
left: 10px;
top: 10px;
z-index: 1;
background-color: #fff;
}
.panel .btn {
cursor: pointer;
}
</style>
</head>
<body>
<div id="cesium-container" />
<div class="panel">
<p class="btn">1、绘制发光的线</p>
<p class="btn">2、绘制指定颜色的线</p>
<p class="btn">3、绘制指定颜色指定边框颜色的线</p>
<p class="btn">4、绘制指定颜色的箭头静态指示线</p>
<p class="btn">5、绘制虚线</p>
<p class="btn">6、绘制动态的线</p>
<p class="btn">清除</p>
</div>
<script>
let viewer
window.onload = function () {
viewer = new Cesium.Viewer('cesium-container', {
sceneModePicker: true,
navigation: false,
})
initBindDrawEventHandler()
}
// 初始化绑定按钮的绘制事件
function initBindDrawEventHandler() {
const btns = document.querySelectorAll('.panel .btn')
btns[0].addEventListener('click', () => {
drawGlowingLineHandler()
activeCurrentClickBtnHandler(0)
})
btns[1].addEventListener('click', () => {
drawSpecifyColorLineHandler()
activeCurrentClickBtnHandler(1)
})
btns[2].addEventListener('click', () => {
drawSpecifyColorAndOutlineColorLineHandler()
activeCurrentClickBtnHandler(2)
})
btns[3].addEventListener('click', () => {
drawSpecifyColorArrowStaticStateLineHandler()
activeCurrentClickBtnHandler(3)
})
btns[4].addEventListener('click', () => {
drawDashedLineHandler()
activeCurrentClickBtnHandler(4)
})
btns[5].addEventListener('click', () => {
drawDynamicLineHandler()
activeCurrentClickBtnHandler(5)
})
btns[6].addEventListener('click', () => {
clearAllEntitiesHandler()
activeCurrentClickBtnHandler(6)
})
}
// 1、绘制发光的线
function drawGlowingLineHandler() {
viewer.entities.add({
name: 'Glowing blue line on the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([
50, // 第一个点经度lon
30, // 第一个点纬度lat
130, // 第二个点经度lon
30, // 第二个点纬度lat
]),
width: 5,
followSurface: true,
material: new Cesium.PolylineGlowMaterialProperty({
glowPower: 0.2,
color: Cesium.Color.BLUE,
}),
},
})
}
// 2、绘制指定颜色的线
function drawSpecifyColorLineHandler() {
viewer.entities.add({
name: 'Red line on the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([50, 20, 140, 20]),
width: 5,
material: Cesium.Color.RED,
},
})
}
// 3、绘制指定颜色指定边框颜色的线
function drawSpecifyColorAndOutlineColorLineHandler() {
viewer.entities.add({
name: 'Orange line with black outline at height and following the surface',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, 10, 500000, 140, 10, 250000,
]),
width: 10, // 线宽
material: new Cesium.PolylineOutlineMaterialProperty({
color: Cesium.Color.ORANGE, // 指定颜色
outlineWidth: 2, // 边框的宽度
outlineColor: Cesium.Color.RED, // 指定边框颜色
}),
},
})
}
// 4、绘制指定颜色的箭头静态指示线
function drawSpecifyColorArrowStaticStateLineHandler() {
viewer.entities.add({
name: 'Purple straight arrow at height',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, 0, 500000, 140, 0, 500000,
]),
width: 10,
followSurface: false,
material: new Cesium.PolylineArrowMaterialProperty(
Cesium.Color.YELLOW
),
},
})
}
// 5、绘制虚线
function drawDashedLineHandler(params) {
viewer.entities.add({
name: 'CYAN dashed line',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
50, -10, 500000, 140, -10, 500000,
]),
width: 4,
material: new Cesium.PolylineDashMaterialProperty({
color: Cesium.Color.CYAN,
}),
},
})
}
// 6、绘制动态的线
function drawDynamicLineHandler(params) {
viewer.entities.add({
name: 'RED dynamic line',
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([0, 45, 125, 45]),
width: 10,
hMax: 500000,
material: new Cesium.PolylineDynamicMaterialProperty({
color: Cesium.Color.RED,
outlineWidth: 0,
outlineColor: Cesium.Color.BLACK,
}),
},
})
}
// 清除所有实体
function clearAllEntitiesHandler() {
viewer.entities.removeAll()
}
// 高亮当前点击的线段
function activeCurrentClickBtnHandler(idx) {
const btns = document.querySelectorAll('.panel .btn')
Array.from(btns).forEach((btn, index) => {
btn.style.color = index === idx ? 'red' : '#000'
})
}
</script>
</body>
</html>
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