Cesium 自定义Material 系列 （三）

• 对于动态流线效果 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 PMaterialDynamicFlow{
• color?:any,
• speed?:number,
• opacity?:number,
• percent?:number,
• }

• 对于动态流线我们叫 MaterialDynamicFlow

```javascript

import {MaterialProperty} from "./MaterialProperty";

const defaultOption: PMaterialDynamicFlow = {
color: Cesium.Color.AQUA,//颜色
speed: 1,//步长
percent:0.03,//动点占线段长度的百分比
opacity:0.0//背景线段的透明度
}
/**

• 动态流线--点在线上跑
  */
  export class MaterialDynamicFlow extends MaterialProperty{
  protected _getType(option: any): string {
  return "MaterialDynamicFlow"
  }
  constructor(option=defaultOption) {
  super(MaterialDynamicFlow.prototype, defaultOption, option);
  }
  protected getSource(option: any): string {
  return `
  uniform vec4 color;
  uniform float speed;
  uniform float percent;
  uniform float opacity;
  czm_material czm_getMaterial(czm_materialInput materialInput)
  {
  czm_material material = czm_getDefaultMaterial(materialInput);
  vec2 st = materialInput.st;

 更多参考https://xiaozhuanlan.com/topic/5341097268