https://vibeisland.app/_astro/Layout.astro_astro_type_script_index_0_lang.qDRC5k8s.js

1(function(){var a=document.getElementById("grain-overlay");if(!a||!window.matchMedia("(min-width: 768px)").matches||window.matchMedia("(prefers-reduced-motion: reduce)").matches)return;var t=window.innerWidth,o=window.innerHeight;a.width=t,a.height=o;var e=a.getContext("webgl")||a.getContext("experimental-webgl");if(!e)return;var d="attribute vec2 p;void main(){gl_Position=vec4(p,0,1);}",n=["precision highp float;","uniform vec2 u_res;","uniform float u_time;","uniform vec3 u_color;","uniform float u_intensity;","uniform float u_rays;","uniform float u_reach;","uniform float u_dither;","","/* Noise helpers (standard GLSL noise library, MIT) */","float mod289(float x){return x-floor(x*(1./289.))*289.;}","vec2 mod289(vec2 x){return x-floor(x*(1./289.))*289.;}","vec4 mod289(vec4 x){return x-floor(x*(1./289.))*289.;}","float permute(float x){return mod289(((x*34.)+1.)*x);}","vec4 permute(vec4 x){return mod289(((x*34.)+1.)*x);}","vec2 quintic(vec2 v){return v*v*v*(v*(v*6.-15.)+10.);}","","float pnoise(vec2 P,vec2 rep){","  vec4 Pi=floor(P.xyxy)+vec4(0,0,1,1);","  vec4 Pf=fract(P.xyxy)-vec4(0,0,1,1);","  Pi=mod(Pi,rep.xyxy);Pi=mod289(Pi);","  vec4 ix=Pi.xzxz,iy=Pi.yyww,fx=Pf.xzxz,fy=Pf.yyww;","  vec4 i=permute(permute(ix)+iy);","  vec4 gx=fract(i*(1./41.))*2.-1.;","  vec4 gy=abs(gx)-.5;","  vec4 tx=floor(gx+.5);","  gx=gx-tx;","  vec2 g00=vec2(gx.x,gy.x),g10=vec2(gx.y,gy.y);","  vec2 g01=vec2(gx.z,gy.z),g11=vec2(gx.w,gy.w);","  vec4 norm=1.79284291400159-.85373472095314*vec4(dot(g00,g00),dot(g01,g01),dot(g10,g10),dot(g11,g11));","  g00*=norm.x;g01*=norm.y;g10*=norm.z;g11*=norm.w;","  float n00=dot(g00,vec2(fx.x,fy.x));","  float n10=dot(g10,vec2(fx.y,fy.y));","  float n01=dot(g01,vec2(fx.z,fy.z));","  float n11=dot(g11,vec2(fx.w,fy.w));","  vec2 fade=quintic(Pf.xy);","  vec2 nx=mix(vec2(n00,n01),vec2(n10,n11),fade.x);","  return 2.3*mix(nx.x,nx.y,fade.y);","}","","/* Ray strength from a point source */","float rayStr(vec2 src,vec2 dir,vec2 coord,float sA,float sB,float spd){","  vec2 d=coord-src;","  float cosA=dot(normalize(d),dir);","  float diag=length(u_res);","  return clamp(","    (.45+.15*sin(cosA*sA+u_time*spd))+","    (.3+.2*cos(-cosA*sB+u_time*spd)),","    u_reach,1.)*","    clamp((diag-length(d))/diag,u_reach,1.);","}","","/* Bayer 4x4 ordered dithering */","float bayer4(vec2 p){","  int x=int(mod(p.x,4.));","  int y=int(mod(p.y,4.));","  int i=x+y*4;","  float th;","  if(i==0)th=0.;else if(i==1)th=8.;else if(i==2)th=2.;else if(i==3)th=10.;","  else if(i==4)th=12.;else if(i==5)th=4.;else if(i==6)th=14.;else if(i==7)th=6.;","  else if(i==8)th=3.;else if(i==9)th=11.;else if(i==10)th=1.;else if(i==11)th=9.;","  else if(i==12)th=15.;else if(i==13)th=7.;else if(i==14)th=13.;else th=5.;","  return th/16.;","}","","void main(){","  vec2 coord=vec2(gl_FragCoord.x,u_res.y-gl_FragCoord.y);","  float spd=u_rays*10.;","  vec2 src1=vec2(u_res.x*0.5,u_res.y*-0.4);","  vec2 src2=vec2(u_res.x*0.52,u_res.y*-0.5);","  float s1=rayStr(src1,normalize(vec2(1.,-.116)),coord,36.22*spd,21.11*spd,1.5*spd);","  float s2=rayStr(src2,normalize(vec2(1.,.241)),coord,22.4*spd,18.02*spd,1.1*spd);","  float bright=1.0*u_reach-(coord.y/u_res.y);","  float att=clamp(bright+(.5+u_intensity),0.,1.);","  float a1=s1*att;","  float a2=s2*att;","  vec3 pm1=u_color*a1;","  vec3 pm2=u_color*a2;","  vec3 blended=pm1+pm2;","  float a=a1+a2*(1.-a1);","  vec3 final=blended/max(a,0.0001);","","  float da=u_dither>0.5?step(bayer4(gl_FragCoord.xy),a):a;","  gl_FragColor=vec4(final*da,da);","}"].join(`
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