WebGIS加油站

# cesium-动态闪烁点

# 介绍

之前介绍了点动态扩散效果，现在实现一下点的动态闪烁效果

# 实现效果

image-20220327195743028

# 完整代码

这里使用vue实现

<template>
  <div class="home">
    <el-row type="flex" :gutter="20">
      <el-col :span="24">
        <div class="grid-content bg-purple">
          <el-breadcrumb separator="/">
            <el-breadcrumb-item>cesium</el-breadcrumb-item>
            <el-breadcrumb-item>效果</el-breadcrumb-item>
            <el-breadcrumb-item>动态闪烁点</el-breadcrumb-item>
          </el-breadcrumb>
        </div>
      </el-col>
    </el-row>
    <el-row type="flex" :gutter="20">
      <el-col :span="24">
        <div class="grid-content bg-purple">
          <cesiumComponent id="cesium" ref="refCesium"/>
        </div>
      </el-col>
    </el-row>
    <el-row type="flex" :gutter="20">
      <el-col :span="24">
        <div class="grid-content bg-purple">
          <el-button type="primary" @click="addMarks()">添加标记</el-button>
          <el-button type="primary" @click="removeMarks()">移除标记</el-button>
        </div>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import cesiumComponent from '../cesium.vue'

export default {
  name: "dynamic_flickering_point",
  data() {
    return {
      _viewer: undefined,
      _camera: undefined,
    };
  },
  components: {
    cesiumComponent
  },
  mounted() {
    this.init();
    let tileset = this._viewer.scene.primitives.add(new Cesium.Cesium3DTileset({
      id: '天街',
      url: '../tianjie/tileset.json',
      modelMatrix: Cesium.Matrix4.fromArray(
          [0.9972458032561666, 0.04372029028528979, 0.05991113506964879, 0,
            -0.03623787897545647, 0.9920229449104262, -0.12073646051879428, 0,
            -0.06471185374661931, 0.11823287609043515, 0.9908750491338749, 0,
            -663.0794944260269, 1211.490494620055, 2974.1003134818748, 1]),
    }));
    this.model = tileset;
    this._viewer.flyTo(tileset, {
      offset: {
        heading: Cesium.Math.toRadians(20.0),//方向
        pitch: Cesium.Math.toRadians(-25),//倾斜角度
        range: 1000
      }
    });
  },
  methods: {
    init() {
      let that = this;
      that.$refs.refCesium.initMap();
      that._viewer = that.$refs.refCesium._viewer;
      that._camera = that._viewer.camera;
      that._viewer.scene.globe.depthTestAgainstTerrain = true;

    },
    /**
     * 添加闪烁点标记
     */
    addMarks() {
      let mark = this._viewer.entities.getById('pointMark0');
      if (mark) {
        return;
      }
      let lon = 118.69693328438744;
      let lat = 32.16565389248538;
      let viewer = this._viewer;
      let arr = [
        [118.69232168070495, 32.17174377911045, '1']
        , [118.70118355191211, 32.17149742965923, '1']
        , [118.7135201280693, 32.17060732976496, '2']
        , [118.7100182943429, 32.162827576311784, '2']
        , [118.70330930974372, 32.16393800944561, '2']
        , [118.69847930003235, 32.157558579127496, '1']
        , [118.69667363062379, 32.15193789644726, '2']
        , [118.71018941128641, 32.15143816299957, '1']
        , [118.72503235072867, 32.16550092454843, '2']
        , [118.72514124726581, 32.16078350776156, '1']
        , [118.68319522051482, 32.17526753953092, '2']
        , [118.67295317984683, 32.16930630619532, '1']
        , [118.67520477557645, 32.160922933703525, '2']
        , [118.68377541019898, 32.15496145901921, '1']
        , [118.68704447669086, 32.16446774199275, '2']
        , [118.7043719927273, 32.15781582115282, '2']
        , [118.69821296130193, 32.16344450797241, '1']
        , [118.70534769065021, 32.15041271677243, '1']
        , [118.6918349411336, 32.16543250471732, '2']
        , [118.68851486117792, 32.15898581278363, '1']
        , [118.68819143314698, 32.15327145811716, '2']
        , [118.69247031627323, 32.15111753617475, '1']
        , [118.68762735329693, 32.17146614334811, '2']
      ];
      for (let i = 0; i < arr.length; i++) {
        let x = 1;
        let pixelSize = 30;
        let outLineOpacity = 0.2;
        let outLineFlog = true;
        let pixelSizeFlog = true;
        let flog = true;
        viewer.entities.add({
          id: 'pointMark' + i,
          name: "圆点point闪烁",
          // position:Cesium.Cartesian3.fromDegrees(lon+0.03,lat+0.03,0),
          position: Cesium.Cartesian3.fromDegrees(arr[i][0], arr[i][1], 0),
          billboard: {
            image: require('../../../assets/mark.png'),
            horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
            verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
            scale: 0.4,
          },
          point: {
            show: true, // default
            color: new Cesium.CallbackProperty(function () {
              if (flog) {
                x = x - 0.03;
                if (x <= 0) {
                  flog = false;
                }
              } else {
                x = x + 0.03;
                if (x >= 1) {
                  flog = true;
                }
              }
              if (arr[i][2] === '1') {
                return Cesium.Color.YELLOW.withAlpha(x);
              } else {
                return Cesium.Color.RED.withAlpha(x);
              }
            }, false),
            pixelSize: new Cesium.CallbackProperty((time, result) => {
              return pixelSizeFlog ? (pixelSize += 2,
              pixelSize >= 30 && (pixelSizeFlog = false)) : (pixelSize = 10,
                  pixelSizeFlog = true),
                  pixelSize
            }, false),
            outlineColor: new Cesium.CallbackProperty(() => {
              if (arr[i][2] === '1') {
                return outLineFlog ? (outLineOpacity -= .035,
                outLineOpacity <= 0 && (outLineFlog = false)) : (outLineOpacity = .7,
                    outLineFlog = true),
                    Cesium.Color.YELLOW.withAlpha(outLineOpacity)
              } else {
                return outLineFlog ? (outLineOpacity -= .035,
                outLineOpacity <= 0 && (outLineFlog = false)) : (outLineOpacity = .7,
                    outLineFlog = true),
                    Cesium.Color.RED.withAlpha(outLineOpacity)
              }
            }, false),
            outlineWidth: 30,
            scaleByDistance: new Cesium.NearFarScalar(1200, 1, 5200, 0.4),
          }
        });
      }

    },
    /**
     * 移除标记
     **/
    removeMarks() {
      let arr = [
        [118.69232168070495, 32.17174377911045, '1']
        , [118.70118355191211, 32.17149742965923, '1']
        , [118.7135201280693, 32.17060732976496, '2']
        , [118.7100182943429, 32.162827576311784, '2']
        , [118.70330930974372, 32.16393800944561, '2']
        , [118.69847930003235, 32.157558579127496, '1']
        , [118.69667363062379, 32.15193789644726, '2']
        , [118.71018941128641, 32.15143816299957, '1']
        , [118.72503235072867, 32.16550092454843, '2']
        , [118.72514124726581, 32.16078350776156, '1']
        , [118.68319522051482, 32.17526753953092, '2']
        , [118.67295317984683, 32.16930630619532, '1']
        , [118.67520477557645, 32.160922933703525, '2']
        , [118.68377541019898, 32.15496145901921, '1']
        , [118.68704447669086, 32.16446774199275, '2']
        , [118.7043719927273, 32.15781582115282, '2']
        , [118.69821296130193, 32.16344450797241, '1']
        , [118.70534769065021, 32.15041271677243, '1']
        , [118.6918349411336, 32.16543250471732, '2']
        , [118.68851486117792, 32.15898581278363, '1']
        , [118.68819143314698, 32.15327145811716, '2']
        , [118.69247031627323, 32.15111753617475, '1']
        , [118.68762735329693, 32.17146614334811, '2']
      ];
      for (let i = 0; i < arr.length; i++) {
        let mark = this._viewer.entities.getById('pointMark' + i);
        this._viewer.entities.remove(mark)
      }
    },
  },
  created() {

  },
}
</script>

<style scoped>
.home {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.el-breadcrumb {
  margin: 10px;
  font-size: 15px;
}

#cesium {
  max-height: 700px;
}
</style>
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# 核心代码

    /**
     * 添加闪烁点标记
     */
    addMarks() {
      let mark = this._viewer.entities.getById('pointMark0');
      if (mark) {
        return;
      }
      let lon = 118.69693328438744;
      let lat = 32.16565389248538;
      let viewer = this._viewer;
      let arr = [
        [118.69232168070495, 32.17174377911045, '1']
        , [118.70118355191211, 32.17149742965923, '1']
        , [118.7135201280693, 32.17060732976496, '2']
        , [118.7100182943429, 32.162827576311784, '2']
        , [118.70330930974372, 32.16393800944561, '2']
        , [118.69847930003235, 32.157558579127496, '1']
        , [118.69667363062379, 32.15193789644726, '2']
        , [118.71018941128641, 32.15143816299957, '1']
        , [118.72503235072867, 32.16550092454843, '2']
        , [118.72514124726581, 32.16078350776156, '1']
        , [118.68319522051482, 32.17526753953092, '2']
        , [118.67295317984683, 32.16930630619532, '1']
        , [118.67520477557645, 32.160922933703525, '2']
        , [118.68377541019898, 32.15496145901921, '1']
        , [118.68704447669086, 32.16446774199275, '2']
        , [118.7043719927273, 32.15781582115282, '2']
        , [118.69821296130193, 32.16344450797241, '1']
        , [118.70534769065021, 32.15041271677243, '1']
        , [118.6918349411336, 32.16543250471732, '2']
        , [118.68851486117792, 32.15898581278363, '1']
        , [118.68819143314698, 32.15327145811716, '2']
        , [118.69247031627323, 32.15111753617475, '1']
        , [118.68762735329693, 32.17146614334811, '2']
      ];
      for (let i = 0; i < arr.length; i++) {
        let x = 1;
        let pixelSize = 30;
        let outLineOpacity = 0.2;
        let outLineFlog = true;
        let pixelSizeFlog = true;
        let flog = true;
        viewer.entities.add({
          id: 'pointMark' + i,
          name: "圆点point闪烁",
          // position:Cesium.Cartesian3.fromDegrees(lon+0.03,lat+0.03,0),
          position: Cesium.Cartesian3.fromDegrees(arr[i][0], arr[i][1], 0),
          billboard: {
            image: require('../../../assets/mark.png'),
            horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
            verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
            scale: 0.4,
          },
          point: {
            show: true, // default
            color: new Cesium.CallbackProperty(function () {
              if (flog) {
                x = x - 0.03;
                if (x <= 0) {
                  flog = false;
                }
              } else {
                x = x + 0.03;
                if (x >= 1) {
                  flog = true;
                }
              }
              if (arr[i][2] === '1') {
                return Cesium.Color.YELLOW.withAlpha(x);
              } else {
                return Cesium.Color.RED.withAlpha(x);
              }
            }, false),
            pixelSize: new Cesium.CallbackProperty((time, result) => {
              return pixelSizeFlog ? (pixelSize += 2,
              pixelSize >= 30 && (pixelSizeFlog = false)) : (pixelSize = 10,
                  pixelSizeFlog = true),
                  pixelSize
            }, false),
            outlineColor: new Cesium.CallbackProperty(() => {
              if (arr[i][2] === '1') {
                return outLineFlog ? (outLineOpacity -= .035,
                outLineOpacity <= 0 && (outLineFlog = false)) : (outLineOpacity = .7,
                    outLineFlog = true),
                    Cesium.Color.YELLOW.withAlpha(outLineOpacity)
              } else {
                return outLineFlog ? (outLineOpacity -= .035,
                outLineOpacity <= 0 && (outLineFlog = false)) : (outLineOpacity = .7,
                    outLineFlog = true),
                    Cesium.Color.RED.withAlpha(outLineOpacity)
              }
            }, false),
            outlineWidth: 30,
            scaleByDistance: new Cesium.NearFarScalar(1200, 1, 5200, 0.4),
          }
        });
      }
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上次更新时间: 2022年5月20日星期五上午11点16分

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