JS1k: The JavaScript code golfing competition

_=' u{NclearRect(80800i=9
i>2?"#aaa":i2,7,2J3,s/100;i=l{o=eH,pDqQv=w=s=t=
cp,q,2.5,7)p-3*u,q-3*v,j=l;j^i!=jE(`	D~	Qd,	c=c?(kL,44@-.L*$exp((45-d)*(d-45)/289)vxwyk=1-$abs(d-30)/8U>0E!((i+j)%4)Ei<jE(k,.5	D	y)):(k4L0@sxty/d));jv*v+w*wj/j,.4sGv/j,tGw/j,x=x-p,y=y-q,d$max(.1,sG2*xtG2*y`n,~gUU9,1760/(k*k))/k,sDtQx+uBus,y+vBvt,d<18E(s++,tt>=3?c%6+3)}requestAnimaZFrame(u)}m=Math,z=$sqrt,b=$mO,r={return 0|640*$random},l=L5,e=[],i=leH=V,y,t:i%9,u:v:c%3,;h=[V:12I12C6I20C20I6]U=3;k<9;)h[k++]=V+8y+80};n=g=a.onmouse_=(o){nKX,gKY},u
1Style=+12)+",50%,60%)"J)_To(p,q)lOeTo(NlOeWidtho.0,hH.	e[j].Gk*:r,Nx*x+y*y)funcZNglobalAlpha=for(begOPath;i^h[t]."hsl("+(75*s:0}=/d,()=z(=b(strokeDQ2),$m.@/(d*d)B=.92*C,V:Dx,E&&G+=H[i]Iy:Jarc(KpageL22Nc.OinQy,U,kV{xZtion^--;)_move`x=p-~y=q-+.1*';for(Y in $='~`_^ZVUQONLKJIHGEDCB@$	
')with(_.split($[Y]))_=join(pop());eval(_)

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

// swarm
m=Math
z=m.sqrt
b=m.min
r = function(){ return 0|( m.random()*640 ) }

l=225
e = []
for(i=l;i--;)
    e[i]={x:r(), y:r(), t:i%9, u:0, v:0, c:r()%3 ,s:0}


h = [
    {x:120,y:120,s:0},
    {x:60,y:200,s:0},
    {x:200,y:60,s:0},
]
for(k=3;k<9;)
    h[k ++]={x:r()+80, y:r() +80}

n=g=0
a.onmousemove = function(e){
    n=e.pageX
    g=e.pageY
}

// loop
function u (){

    c.clearRect(0,0,800,800)

    //draw honey pot
    for( i=9;i--;){
        c.globalAlpha = c.lineWidth =1
        c.strokeStyle= i > 2 ? '#aaa' : 'hsl(' + ( i*75 + 12 ) + ',50%,60%)'
        c.beginPath()
        c.arc( h[i].x, h[i].y, 22, 0, 7 )
        c.stroke()
        c.beginPath()
        c.lineWidth = 2
        c.arc( h[i].x, h[i].y, 23, 0, h[i].s/100 )
        c.stroke()
    }

    // fly
    for( i=l;i--;){

        o=e[i]

        p = o.x
        q = o.y

        v = w = s = t = 0


        // draw
        c.globalAlpha = c.lineWidth = 1
        c.strokeStyle= 'hsl(' + ( o.c*75 + 12 ) + ',50%,60%)'
        c.beginPath()
        c.arc( p, q, 2.5, 0, 7 )
        c.moveTo(p, q)
        c.lineTo(p - o.u *3, q - o.v *3)
        c.stroke()


        for( j=l;j--;)
            if(i!=j){

                x = p - e[j].x
                y = q - e[j].y

                d = z(x*x + y*y )


                if ( e[j].c == o.c ) {

                    k = b( 22, 44 / ( d *d ) - 0.22 * m.exp( ( 45-d )*( d- 45 ) / 289 ) )
                    v += k*x/d
                    w += k*y/d

                    k = 1 - m.abs( d - 30 ) / 8

                    if ( k > 0 && !((i+j) % 4) && i<j ) {
                        c.globalAlpha = k
                        c.lineWidth = 0.5
                        c.moveTo( p, q )
                        c.lineTo( e[j].x, e[j].y )
                        c.stroke()
                    }

                } else {

                    k = b( 40, 220 / ( d * d ) )
                    s += k*x/d
                    t += k*y/d
                }
            }


        // limit firendship influence
        // prevent from forming a firendship ball
        j = z( v * v + w * w )
        j = j / b( j, 0.4 )

        s += v / j
        t += w / j


        // honey pot influence

        x = h[ o.t ].x - p
        y = h[ o.t ].y - q

        d =z(m.max( 0.1, x*x + y*y ))

        s += 2*x/d
        t += 2*y/d


        // pointer influence
        x = p - n
        y = q - g

        k = z( x*x + y*y )
        k = b( 9, 1760 / ( k*k ) ) / k
        s += k*x
        t += k*y





        // physic step

        o.x += (o.u = o.u * 0.92 +  s * 0.1)
        o.y += (o.v = o.v * 0.92 +  t * 0.1)

        if ( d < 18 ){
            h[ o.t ].s ++
            o.t = o.t >= 3 ? o.c : (r()%6)+3
        }

    }

    // loop
    requestAnimationFrame( u )
    // setTimeout(u,16)
}
u()