float random (vec2 st) {
return fract(sin(dot(st.xy,vec2(12.9898,78.233)))*43758.5453123);
}
void main(){
vec2 uv = gl_FragCoord.xy/iResolution.xy;
gl_FragColor = vec4(vec3(random(uv)),1.0);
}
参考:https://blog.csdn.net/a_codecat/article/details/127563784