cesium 图层构建的那些事 （十四）

针对 一些Primiteve 特定要素我们定义Primiteve图层

```javascript

import {Layer} from "./Layer";

export abstract class PrimiteveLayer extends Layer {
constructor(name: string) {
super(name);
}

• protected _addToMap(map: Map): void {
• map.scene.primitives.add(this.cesiumObj);
• }
•  
• protected _removeByMap(destroy?: boolean): void {
• this.map.scene.primitives.remove(this.cesiumObj);
• }
•  
• protected _flyTo(duration = 3, pitch = -90, heading = 0, range = 0, maximumHeight?: number) {

 更多参考 https://xiaozhuanlan.com/topic/6059371482