JS1k: The JavaScript code golfing competition

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// set up canvas for drawing
c=document.body.children[0],W=window.innerWidth,H=window.innerHeight;c.width=W,c.height=H,c=c.getContext('2d');
// multiplies vector with a value
b=function(v,s,a){return [v[0]*s,v[1]*s,v[2]*s,v[3]]};
// rotate vector around y
vy=function(v,s,a){is=Math.sin(s),ic=Math.cos(s);return [v[2]*ic-v[0]*is,v[1],v[2]*is+v[0]*ic,v[3]]};
// rotate vector around x
vx=function(v,s,a){is=Math.sin(s),ic=Math.cos(s);return [v[0],v[1]*ic-v[2]*is,v[1]*is+v[2]*ic,v[3]]};
// conversion from 3d to 2d
vi=function(v,s,a){r=[];r[2]=((s=v[2]/2)+30)/30;r[0]=C[0]-v[0]*r[2]*10;r[1]=C[1]-v[1]*r[2]*10;r[2]=C[2]+r[2]*3;r[3]=v[3];return r};
// color format
cf=function(v,s,a){return [v[0]|0,v[1]|0,v[2]|0,v[3]]};
// plot particle
p2=function(v,s,a){if(v[2]<=0)return ;c.fillStyle='rgba('+cf(v[3])+')';c.fillRect(v[0],v[1],v[2],v[2])};
// adjust color of a particle
vc=function(v,s,a){r=[];r[0]=(W-v[0])*255/W;r[1]=(H-v[1])*255/H;r[2]=(1-os)*v[2]*22;r[3]=v[2]*2*2000/pc;v[3]=r;return v};
// rotation based on time
vt=function(v,s,a){return vx(vy(v,tt),os)};
// function 1
e=function(v,s,a){return Math.sin(tt+v[0]+v[2])*3};
// function 2
at=function(v,s,a){return Math.sin(tt+v[0]/3+v[1]/3)+1.5};
// merge functions
t=function(v,s,a){return b(v,at(v)+os*e(v)/10+os)};
// spherizes random dots
s3=function(v,s,a){return b(v,17/Math.sqrt(v[0]*v[0]+v[1]*v[1]+v[2]*v[2]))};
// reset
//   'javascript:R(particle count, time step)'
//   tt  - total time
//   pc  - particle count
//   p[] - particles
//   ts  - timestep
// most stuff goes on here
//   p2(vc(vi(vt(t(p[i])))))
//      p[i] is a vector [x,y,z,[r,g,b,a]]
//      t  apply transformation
//      vt rotate
//      vi add perspective and transpose to canvas space
//      vc color particle
//      p2 plot particle
R=function(v,s,a){pc=v;ts=s;tt=3;p=[];for(i=0;i<v;i++)p.push([Math.random()-.5,Math.random()-.5,Math.random()-.5,[0,0xff,0,1]]);for(i in p)p[i]=s3(p[i])};
// interval
setInterval(function(v,s,a){tt+=ts;os=Math.sin(tt);c.globalCompositeOperation='source-over';c.fillStyle='#000';c.fillRect(0,0,W,H);c.globalCompositeOperation='lighter';for(i in p)p2(vc(vi(vt(t(p[i])))))},1000);C=[W/2,H/2,0];
R(70000,.34);