【超图+CESIUM】【基础API使用示例】33、超图｜CESIUM - 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）_cesium 线闪烁

作者：你好赵伟 | 2024-02-18 17:52:06

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cesium 线闪烁

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）。
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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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