JS1k 2010 - 365 - Details - A ground breaking JavaScript golfing competition

Author:

Philip Wagner

Twitter:

GitHub:

Facebook:

Google+:

Reddit:

/r/

Pouet:

Website:

think-jeckel.de

Compo:

classic

Demo link:

https://js1k.com/2010-first/demo/365

Shortlink:

https://js1k.com/365

Blog post:

please update here!

Bytes:

827

Chars:

827

Submission

M=Math;r=M.random;s=[];n=function(){for(i=12;i--;)s[i]=[r()*3-1,r()*3-1]};n();function z(g,f,k){F=0.5-f*f-k*k;return F<0?0:M.pow(F,4)*(s[g%12][0]*f+s[g%12][1]*k)}u=[];for(i=255;i--;)u[i]=~~(r()*256);function q(g,f){e=0.2;a=(g+f)*0.3;m=~~(g+a);b=~~(f+a);a=(m+b)*e;c=g-(m-a);j=f-(b-a);C=c>j;return 70*(z(u[m+u[b]],c,j)+z(u[m+C+u[b+!C]],c-C+e,j-!C+e)+z(u[m+1+u[b+1]],c-0.6,j-0.6))}c=document.body.children[0];c.width=w=innerWidth;c.height=h=innerHeight;document.body.style.overflow="hidden";x=[];for(i=w;i--;)x[i]={x:r()*w,y:r()*h};d=c.getContext("2d");setInterval(function(){d.fillStyle="rgba(255,255,255,.05)";d.fillRect(0,0,w,h);d.fillStyle="#000";for(i=w;i--;){X=x[i];a=q(X.x/300,X.y/300)*9;X.x+=M.cos(a);X.y+=M.sin(a);if(X.x<0||X.x>w||X.y<0||X.y>h){X.x=r()*w;X.y=r()*h}d.fillRect(X.x,X.y,1,1)}},33);c.onclick=function(){n()};

Description

Implemented the perlin noise algorithm. It's pretty big, so there wasn't much room left. But i love it so much. Click the canvas to generate a new seed. 1.1: Now in black on white and smaller 1.2: Much smaller noise algorith, thanks to http://twitter.com/Cay

Base64 encoded

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

Original source

M = Math;
r = M.random;

s = [];
n = function(){
  for (i = 12; i--;) {
    s[i] = [r()*3-1, r()*3-1]
  }
}
n();

function z(k, t, j) {
  F = .5 - t * t - j * j;
  return (F < 0) ? 0 : M.pow(F, 4) * (s[k%12][0] * t + s[k%12][1] * j)
}

u = [];
for (i = 255; i--;) {
  u[i] = ~~(r() * 256)
}

function q(k, t) {
  e = .2;
  a = (k + t) * .3;
  m = ~~(k + a);
  b = ~~(t + a);
  a = (m + b) * e;
  
  c = k - (m - a);
  j = t - (b - a);
  
  C = c > j;

  return 70 * (z(u[m + u[b]], c, j) + 
               z(u[m + C + u[b + !C]], c - C + e, j - !C + e) + 
               z(u[m + 1 + u[b + 1]], c - .6, j - .6))
};

c = document.body.children[0];
c.width = w = innerWidth;
c.height = h = innerHeight;
document.body.style.overflow = 'hidden';

x = [];
for(i = w; i--;) {
  x[i] = {x:r()*w,y:r()*h};
}
d = c.getContext('2d');
setInterval(function() {
  d.fillStyle = 'rgba(255,255,255,.05)';
  d.fillRect(0,0,w,h);
  d.fillStyle = '#000';
  for (i = w; i--;){
    X = x[i];
    a = q(X.x/300, X.y/300)*9;
    X.x += M.cos(a);
    X.y += M.sin(a);
    if (X.x < 0 || X.x > w || X.y < 0 || X.y > h) {
      X.x = r()*w;
      X.y = r()*h;
    }
    d.fillRect(X.x, X.y, 1, 1);
  }
}, 33);
c.onclick=function(){n()};

JS1k: The JavaScript code golfing competition

2010 - The Original