PlottingSymbolLib

Example:

const options = {
     	url: "http://172.30.80.144:8090/fontTest/MapServerParks.ttf",
     }
 const symbolLib = Cesium.PlottingSymbolLibManager.getOrCreateSymbolLib(options);
 symbolLib.initEvent.addEventListener(function(result) {
     	if (result.success) //初始化成功
     	{
     		const cavaswidth = 60;
     		const symbolSize = 48;
     		const glyphOptions = {
     			xoffset: (cavaswidth - symbolSize) * 0.5 + symbolSize * 0.1,
     			yoffset: cavaswidth - (cavaswidth - symbolSize) * 0.5,
     			symbolSize: symbolSize,
     			cavaswidth: cavaswidth
     		}
     		for (const i = 0; i < symbolLib.codes.length; i++) {
     			const code = symbolLib.codes[i];//符号库编码
     			const thumbnail = symbolLib.getGlyph(code, glyphOptions);//根据符号编码生成缩略图
     			const symbolLibID = symbolLib.id;//符号库id，可用此id获取符号库
     		};

     	}
     } else {
     	//do something
     }
 console.log(result.message);
 });