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
