1.本示例使用的是Flowm/cesium-sensor-volumes插件实现的探测效果
首先我们将插件下载后在js文件最上方引入cesium，如下图所示
然后直接可以在本项目中全局访问：CesiumSensorVolumes，该类中有许多探测效果形状，这里我们使用的是RectangularSensorGraphics，具体使用如下代码：
const addSateliteSensor = satelliteId => {
const satelliteEntity = viewer.entities.getById(satelliteId)
const sensorPosition = satelliteEntity.position.getValue()
const sensorOrientation = Cesium.Transforms.headingPitchRollQuaternion(sensorPosition, new Cesium.HeadingPitchRoll(0, Cesium.Math.toRadians(180), 0))
const sensorEntityOption = {
name: 'sensor',
id: 'sensor',
// 传感器位置与卫星绑定
position: new Cesium.CallbackProperty((time, result) => {
let sourpos = satelliteEntity.position.getValue(time)
return sourpos
}, false),
orientation: sensorOrientation,
// 传感器体积配置
rectangularSensor: new CesiumSensorVolumes.RectangularSensorGraphics({})
}
const sensorEntity = viewer.entities.add(sensorEntityOption)
sensorEntity.rectangularSensor.xHalfAngle = Cesium.Math.toRadians(20)
sensorEntity.rectangularSensor.yHalfAngle = Cesium.Math.toRadians(20)
sensorEntity.rectangularSensor.radius = new Cesium.CallbackProperty((time, result) => {
let sourpos = satelliteEntity.position.getValue(time)
let height = Cesium.Ellipsoid.WGS84.cartesianToCartographic(sourpos).height * 3
return height
}, false)
sensorEntity.rectangularSensor.showIntersection = true
sensorEntity.rectangularSensor.intersectionColor = Cesium.Color.fromAlpha(Cesium.Color.YELLOW, 0.6)
sensorEntity.rectangularSensor.intersectionWidth = 1
sensorEntity.rectangularSensor.lateralSurfaceMaterial = new Cesium.ColorMaterialProperty(Cesium.Color.CYAN.withAlpha(0.18))
}
注意事项：
1.position、orientation、rectangularSensor必须配置，否则无效果
2.rectangularSensor字段必须先创建完entity实体后再单独配置rectangularSensor的属性，如果直接在new CesiumSensorVolumes.RectangularSensorGraphics({})构造函数中配置不会生效
效果图如下：
