threejs html5 Canvas酷炫宇宙黑洞粒子动画特效.zip

代码片段： floatrandom(floatval){   returnfract(sin(val)*seed);  }  vec2random2(vec2st,floatseed){    st=vec2(dot(st,vec2(127.1,311.7)),         dot(st,vec2(269.5,183.3)));    return-1.02.0*fract(sin(st)*seed);  }  floatrandom2d(vec2uv){   returnfract(