Cesium里面的平面怎么才能平行地面 现在是垂直的

转发:

 let entityPlane = new Cesium.Entity({
        id: "entityScanGround",
        name: "entityScanGround",
        position: Cesium.Cartesian3.fromDegrees(112.6471429, 38.0090505, 20),
        plane: {
          plane: new Cesium.Plane(Cesium.Cartesian3.UNIT_Y, 0.0),
          dimensions: new Cesium.Cartesian2(400, 300),
          material: Cesium.Color.YELLOW,
        },
      });
      let planeGeom = window.viewer.entities.add(entityPlane);
      window.viewer.zoomTo(planeGeom);
      viewer.trackedEntity = viewer.entities.getById("entityScanGround");

dimensions: new Cesium.Cartesian2(400, 300)你理解清楚这个了就知道能不能平行地面了。 plane: new Cesium.Plane(Cesium.Cartesian3.UNIT_Z）这个可以控制平面朝向