Cesium 封装云效果

/*
 * @Descripttion: 
 * @version: 1.0
 * @Author: tanzheng
 * @Date: 2024-1-22 11:02:42
 */
/**
 * 
 * 封装天气场景
 * 云图
 */
class Cloud {

    constructor(option = {}) {
        this.viewer = option.viewer;
        //加载云特效
        var worldRectangleclouds;
        var radians = 0;

        this.LoadClouds = function () {
            worldRectangleclouds = viewer.scene.primitives.add(new Cesium.Primitive({
                geometryInstances: new Cesium.GeometryInstance({
                    geometry: new Cesium.RectangleGeometry({
                        rectangle: Cesium.Rectangle.fromDegrees(-180.0, -90.0, 180.0, 90.0),
                        vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
                    }),
                }),
                releaseGeometryInstances: false,
                appearance: new Cesium.EllipsoidSurfaceAppearance({
                    material: new Cesium.Material({
                        fabri