cesium 图层构建的那些事 （十七）

根据基础聚合类，我们构建geojosn序列化的聚合使用类

首先是参数定义

interface ClassBreak {

minValue: number,

maxValue: number,

symbol: any

}

interface UniqueValue {

value: number,

symbol: any

}

export interface PRenderer {

type: "simple"|"uniqueValue"|"classBreaks",

field?: string,//simple不需要该参数

symbol: any,

classBreakInfos?: Array<ClassBreak>,

uniqueValueInfos?:Array<UniqueValue>

}

renderer设置

```javascript

import {PRenderer} from "./PRenderer";

import {ColorUtil} from "../utils/ColorUtil";

export class Renderer {

type = "Renderer";

private renderer: PRenderer;

constructor(renderer: PRenderer) {

this.renderer = renderer;

}

/**

* 获得symbol

* @param attributes 属性

* @param {boolean} isEntity 是否是Entity解析

* @returns {any} symbol

*/

public getSymbol(attributes: any, isEntity = false): any {

const {type, field, symbol, uniqueValueInfos, classBreakInfos} = this.renderer;

if (type === "simple") {

if (!symbol) {

throw new Error("缺少属性symbol");

}

return symbol;

}

let value = attributes[field || ""];

if (isEntity) {

value = value?._value

}

if (type === "uniqueValue") {

if (!uniqueValueInfos) {

throw new Error("缺少属性uniqueValueInfos");

}

for (const item of uniqueValueInfos) {

if (item.value == value) {

return item.symbol;

}

}

}

if (type === "classBreaks") {

if (!classBreakInfos) {

throw new Error("缺少属性classBreakInfos");

}

for (const item of classBreakInfos) {

if (value >= item.minValue && value < item.maxValue) {

return item.symbol;

}

}

}

return symbol;

}

public setEntitySymbol(entity: any, attributes: any) {

const symbol = this.getSymbol(attributes, true);

Renderer.setEntityProperties(entity, attributes, symbol);

}

public static setEntityProperties(obj: any, attributes: any, properties: any) {

for (const key in properties) {

const value = properties[key];

if (Object.prototype.toString.call(value) == "[object Object]") {

if (value instanceof Cesium.Color) {

obj[key] = value

} else if (value instanceof Cesium.LabelGraphics) {

const v = value.clone();

v.text = v.text._value.replace(/\${(\w+)+}/g, function (match, key) {

return attributes[key]._value;

});

 更多参考 https://xiaozhuanlan.com/topic/4596712380

首先是参数定义

interface ClassBreak {

minValue: number,

maxValue: number,

symbol: any

}

interface UniqueValue {

value: number,

symbol: any

}

export interface PRenderer {

type: "simple"|"uniqueValue"|"classBreaks",

field?: string,//simple不需要该参数

symbol: any,

classBreakInfos?: Array<ClassBreak>,

uniqueValueInfos?:Array<UniqueValue>

}

renderer设置

```javascript

import {PRenderer} from "./PRenderer";

import {ColorUtil} from "../utils/ColorUtil";

export class Renderer {

type = "Renderer";

private renderer: PRenderer;

constructor(renderer: PRenderer) {

this.renderer = renderer;

}

/**

* 获得symbol

* @param attributes 属性

* @param {boolean} isEntity 是否是Entity解析

* @returns {any} symbol

*/

public getSymbol(attributes: any, isEntity = false): any {

const {type, field, symbol, uniqueValueInfos, classBreakInfos} = this.renderer;

if (type === "simple") {

if (!symbol) {

throw new Error("缺少属性symbol");

}

return symbol;

}

let value = attributes[field || ""];

if (isEntity) {

value = value?._value

}

if (type === "uniqueValue") {

if (!uniqueValueInfos) {

throw new Error("缺少属性uniqueValueInfos");

}

for (const item of uniqueValueInfos) {

if (item.value == value) {

return item.symbol;

}

}

}

if (type === "classBreaks") {

if (!classBreakInfos) {

throw new Error("缺少属性classBreakInfos");

}

for (const item of classBreakInfos) {

if (value >= item.minValue && value < item.maxValue) {

return item.symbol;

}

}

}

return symbol;

}

public setEntitySymbol(entity: any, attributes: any) {

const symbol = this.getSymbol(attributes, true);

Renderer.setEntityProperties(entity, attributes, symbol);

}

public static setEntityProperties(obj: any, attributes: any, properties: any) {

for (const key in properties) {

const value = properties[key];

if (Object.prototype.toString.call(value) == "[object Object]") {

if (value instanceof Cesium.Color) {

obj[key] = value

} else if (value instanceof Cesium.LabelGraphics) {

const v = value.clone();

v.text = v.text._value.replace(/\${(\w+)+}/g, function (match, key) {

return attributes[key]._value;

});

 更多参考 https://xiaozhuanlan.com/topic/4596712380