nh_demo_ui/public/static/plugins/cesium_plugins/radar.js

/*
 * @Description: 雷达扫描效果（参考开源代码）
 * @Version: 1.0
 * @Author: Julian
 * @Date: 2022-03-04 20:02:48
 * @LastEditors: Julian
 * @LastEditTime: 2022-03-05 15:26:47
 */
class Radar {
    constructor(options) {
        // this._definitionChanged = new Cesium.Event();
        // this._color = undefined;
        // this._speed = undefined;
        // this.color = options.color;
        // this.speed = options.speed;
        let that = this;
        this._viewer = options.viewer;
        this._position = options.position;
        this._num = options.num;
        this._maxAngle = options.maxAngle;
        this._entity = this._viewer.entities.add({
            position: that._position, //Cesium.Cartesian3

            orientation: new Cesium.CallbackProperty(() => {
                that._num += 0.3;
                if (that._num >= that._maxAngle) that._num = 0;
                return Cesium.Transforms.headingPitchRollQuaternion(
                    that._entity.position.getValue(Cesium),
                    new Cesium.HeadingPitchRoll((that._num * Math.PI) / 180, 0, 0)
                );
            }, false),
            ellipsoid: {
                radii: new Cesium.Cartesian3(100000.0, 100000.00, 2000.0), // 扇形半径
                innerRadii: new Cesium.Cartesian3(1.0, 1.0, 1.0), // 内半径
                minimumClock: Cesium.Math.toRadians(-10),
                maximumClock: Cesium.Math.toRadians(10),
                minimumCone: Cesium.Math.toRadians(90), // 上下偏角  可以都设置为90
                maximumCone: Cesium.Math.toRadians(90),
                material: Cesium.Color.GREEN.withAlpha(0.5),
                outline: true,
                outlineColor: Cesium.Color.GREEN.withAlpha(.8),
                heightReference: Cesium.HeightReference.CLAMP_TO_GROUND, //RELATIVE_TO_GROUND CLAMP_TO_GROUND
            },
        });
        return this._entity
    };
}