https://layaair2.ldc2.layabox.com/demo2/?language=ch&category=2d&group=Particle&name=T1
是官方文档里的错误，就不截图了。报错内容：Uncaught TypeError: Failed to execute 'attachShader' on 'WebGL2RenderingContext': parameter 2 is not of type 'WebGLShader'. at ParticleShader._compile (VM38 laya.core.js:2554)
