Question

功能需求：点击观察点后直接进行目标点的点击

遇到问题：【添加观察点】后执行了【添加目标点】，但是点击场景的时候没有进入监听事件。

另外：Cesium.PointHandler(Viewer)在跑了一遍添加目标点后的active是true

Answer 1

您用的是绘制完点执行的监听事件吗，能否发下代码。

Comments

我这个是用vue写的，代码如下

//初始化方法      
sightInitializing(tab) {
        sightline = new Cesium.Sightline(Viewer.scene);
        sightline.couldRemove = false;
        sgPointHandler = new Cesium.PointHandler(Viewer);

        let that = this;

        sgPointHandler.drawCompletedEvent.addEventListener((point) => {
          if (!viewPointFlag) {
            this.$message.warning('未添加观察点！');
            return;
          }
          let position = point.position._value;
          sightline.build();
          //将获取的点的位置转化成经纬度
          let cartographic = Cesium.Cartographic.fromCartesian(position);
          let longitude = Cesium.Math.toDegrees(cartographic.longitude);
          let latitude = Cesium.Math.toDegrees(cartographic.latitude);
          let height = cartographic.height;

          if(Viewer.scene.sgFlag) {// 添加观察点

            //设置视口位置
            sightline.viewPosition = [longitude, latitude, height];
            Viewer.scene.sgFlag = false;

            that.pointX = longitude;
            that.pointY = latitude;
            that.pointZ = height;
          } else {// 添加目标点
            // if (sightline.couldRemove) {
            //   sightline.removeAllTargetPoint();
            // }

            Viewer.entities.remove(point);
            //添加视点
            sightline.addTargetPoint({
                position : [longitude, latitude, height],
                name : "point" + new Date()
            });

            sightline.couldRemove = true;
          }
//选择完观察点/目标点后，继续添加下一个目标点
          sgPointHandler.deactivate();
          that.$message.info('请选择目标点')
          that.addTargetPoint()

          let tcolor = Cesium.Color.fromCssColorString(that.trueColor);
          sightline.visibleColor = tcolor;

          let utcolor = Cesium.Color.fromCssColorString(that.errorCorlr);
          sightline.hiddenColor = utcolor;
        });
//默认可以直接选择观察点
        this.$message.info('请选择观察点')
        this.addViewpoint();
      },
      addViewpoint() {
        viewPointFlag = true;
        if(sgPointHandler.active) {
          return;
        }
        Viewer.scene.sgFlag = true;
        Viewer.entities.removeAll();
        if(sightline.couldRemove) {
          sightline.removeAllTargetPoint();
        }
        sgPointHandler.activate();
      },
      addTargetPoint() {
        Viewer.scene.sgFlag = false;
        sgPointHandler.activate();
      },

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PointHandler的绘制绘制完成事件有问题，建议不用PointHandler去绘制点，注册左键事件直接获取场景坐标。

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最后用的是handler = new Cesium.ScreenSpaceEventHandler(Viewer.scene.canvas)来注册事件