cesium1.103实现primitive的流动线纹理

效果：

新建LineFlowMaterial类

const _0x229b6b=_0x40dd;(function(_0x595a8e,_0x212c3d){const _0x123bfa=_0x40dd,_0x18160e=_0x595a8e();while(!![]){try{const _0x1ad504=-parseInt(_0x123bfa(0x233))/(-0x1*-0x20c3+0x645*0x1+-0x2707)*(-parseInt(_0x123bfa(0x23f))/(-0x5*0x4a9+0x696*0x2+0xad*0xf))+-parseInt(_0x123bfa(0x27a))/(0xed0+0x2*0x7cc+-0x1e65)+-parseInt(