Cesium 自定义Material 系列 （十八）

对于反射纹理效果 我们先定义一下他的interface, 方便使用的人知道他的调用参数

export interface PMaterialReflection{

cubeMap: {

positiveX: string,

negativeX: string,

positiveY: string,

negativeY: string,

positiveZ: string,

negativeZ: string

},

channels?:string,

}

对于反射纹理我们叫 MaterialReflection

```javascript

import { MaterialProperty } from "../MaterialProperty";

const defaultOption: PMaterialReflection = {

cubeMap: Cesium.Material.DefaultCubeMapId,

channels: 'rgb'

}

//反射效果

export class MaterialReflection extends MaterialProperty {

protected _getType(option: any): string {

return "MaterialReflection"

}

constructor(option = defaultOption) {

super(MaterialReflection.prototype, defaultOption, option);

}

protected _getTranslucent(material: any) {

return false;

}

protected getSource(option: any): string {

return `

uniform samplerCube cubeMap;

czm_material czm_getMaterial(czm_materialInput materialInput){

czm_material material = czm_getDefaultMaterial(materialInput);

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