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使用超图3D cesium不能正确显示粒子效果
2EXP 2024年08月14日

使用原生的cesium,就没有这个问题,能正确显示粒子效果,你们可以自己测一下!!!我在你们官方下载最新的cesiumjs 

<template>
<div id="cesiumContainer">
</div>
</template>

<script>
import smokeImg from './assets/smoke.png'

export default {
  name: 'App',
  components: {
  },
  data() {
    return {
      viewer: null
    };
  },
  created() {
    // localStorage.setItem('initMap', true)

  },
  mounted() {
    this.loadMapTest();
    this.drawWater();

  },
  methods: {
    loadMapTest() {
      let mapOption = {
        //地图可进行切换
        //高德影像地图
        //url:"https://webst04.is.autonavi.com/appmaptile?style=6&x={x}&y={y}&z={z}",
        //google地图(国内暂时被封),后续如果开放可直接f12-->network获取服务
        //osm矢量地图
        //url:"https://b.tile.openstreetmap.org/{z}/{x}/{y}.png",
        //mapbox影像地图(token如果过期,请选择其他地图图层)
        //url:"https://api.mapbox.com/styles/v1/marsgis/cki0adkar2b0e19mv9tpiewld/tiles/512/{z}/{x}/{y}@2x?access_token=pk.eyJ1IjoibWFyc2dpcyIsImEiOiJja2Fod2xlanIwNjJzMnhvMXBkMnNqcjVpIn0.WnxikCaN2KV_zn9tLZO77A"
        //arcgis影像地图
        url: "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}"
      };
      let imgProvider = new Cesium.UrlTemplateImageryProvider(mapOption);
      let viewerOption = {
        animation: false,//是否创建动画小器件,左下角仪表
        baseLayerPicker: false,//是否显示图层选择器
        fullscreenButton: false,//是否显示全屏按钮
        geocoder: false,//是否显示geocoder小器件,右上角查询按钮
        homeButton: false,//是否显示Home按钮
        infoBox: false,//是否显示信息框
        sceneModePicker: false,//是否显示3D/2D选择器
        scene3DOnly: false,//如果设置为true,则所有几何图形以3D模式绘制以节约GPU资源
        selectionIndicator: false,//是否显示选取指示器组件
        timeline: true,//是否显示时间轴
        navigationHelpButton: false,//是否显示右上角的帮助按钮
        baselLayerPicker: false,// 将图层选择的控件关掉,才能添加其他影像数据
        shadows: true,//是否显示背影
        shouldAnimate: true,
        imageryProvider: imgProvider,
        //加载地形
        // terrainProvider: new Cesium.CesiumTerrainProvider({
        //     url: "http://data.marsgis.cn/terrain",
        // })
      }
      // 创建一个Viewer实例
      this.viewer = new Cesium.Viewer('cesiumContainer', viewerOption)
    },

    //绘制水面波浪效果
    drawWater() {
      setTimeout(() => {
        // this.createWaterSystem({ x: 115.33222244478097, y: 29.84743130583497, z: 10 })
        this.smoke();
      }, 1000)

    },
    // 创建粒子系统
    createWaterSystem(position) {
      let gatePosition = Cesium.Cartesian3.fromDegrees(position.x, position.y, position.z);
      let hole = this.viewer.entities.add({ position: gatePosition });
      let waterParticleSystem = new Cesium.ParticleSystem({
        image: smokeImg,
        startColor: Cesium.Color.WHITE.withAlpha(0.0),
        endColor: Cesium.Color.WHITE.withAlpha(0.65),
        startScale: 10,
        endScale: 10,
        minimumParticleLife: 1.5,
        maximumParticleLife: 1.7,
        minimumSpeed: 1.5,
        maximumSpeed: 2.5,
        imageSize: new Cesium.Cartesian2(10, 10),
        emissionRate: 20,
        emitter: new Cesium.CircleEmitter(20.0),
        // emitter: new Cesium.BoxEmitter(new Cesium.Cartesian3(20.0, 5.0, 5.0)),
        modelMatrix: this.computeModelMatrix(hole),
        emitterModelMatrix: this.computeEmitterModelMatrix(...[65, 0, 0]),
        updateCallback: this.updateCallback
        // sizeInMeters: true,
      });
      // 将粒子系统添加到场景中
      // console.log(waterParticleSystem);

      this.viewer.scene.primitives.add(waterParticleSystem);

      // console.log(window.viewer.scene)
    },
    computeModelMatrix(entity) {
      var position = Cesium.Property.getValueOrUndefined(entity.position, Cesium.JulianDate.now());
      let modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(position);
      // console.log(modelMatrix);
      return modelMatrix;
    },
    // 计算粒子发射器的位置姿态
    computeEmitterModelMatrix(heading, pitch, roll) {
      // console.log(heading, pitch, roll);
      let hpr = Cesium.HeadingPitchRoll.fromDegrees(heading, pitch, roll);
      let trs = new Cesium.TranslationRotationScale();
      trs.translation = Cesium.Cartesian3.fromElements(0, 0, 0);
      trs.rotation = Cesium.Quaternion.fromHeadingPitchRoll(hpr);
      let Matrix4 = Cesium.Matrix4.fromTranslationRotationScale(trs);
      return Matrix4
    },
    // 更新粒子运动状态
    updateCallback(p, dt) {
      // console.log(p, dt);
      var gravityScratch = new Cesium.Cartesian3();
      var position = p.position;
      Cesium.Cartesian3.normalize(position, gravityScratch);
      Cesium.Cartesian3.fromElements(
        20 * dt,
        gravityScratch.y * dt,
        -30 * dt,
        gravityScratch
      );
      p.velocity = Cesium.Cartesian3.add(
        p.velocity,
        gravityScratch,
        p.velocity
      );
    }


  },
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

1个回答

您好,您下载的是最新的2024的supermap for cesium吗?

烟雾效果是可以实现的,可以参考范例cesium包下的webgl/examples/editor.html#Particle%20System_Fire中实现粒子特效的方法

希望可以帮助您
1,315EXP 2024年08月14日

我下载的就是这个cesiumJS,没有用到webGL!

cesium包示例的文件夹是webgl/examples/这样命名的,您可以找到这个示例查看的
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