Babylon.js 构建 地球，支持切片地图 （二）

首先babylonjs 相机我们要改造

对于相机改造类图如下

针对EarthCamera类

• const BABYLON = require('babylonjs');
•  
• export class EarthCamera extends BABYLON.ArcRotateCamera {
• constructor(e, t, i, n, r, o, s) {
• super(e, t, i, n, r, o),
• this.isDirty = true,
• this.diffAlpha = 0,
• this.diffBeta = 0,
• this.diffRadius = 0,
• this.latLonAtmouse = new BABYLON.Vector2
• }
• }

针对CameraControl
```javascript

 更多参考 https://xiaozhuanlan.com/topic/2173489065