var M=Math,C=M.cos,F=M.floor,W=120,Z=0.06,O=0.3,R=15,X=7,T=0,N=0.01,D=0.29,A=0.5,L=100;V=document.getElementById("c");V.width=V.height=W;c=V.getContext("2d");c.fillRect(0,0,W,W);c.fillStyle="rgb(200,200,200)";c.f=c.fillText;d=c.getImageData(0,0,W,W);p=d.data;t=1;t7=t6=t5=t4=0;onkeydown=function(o){K=o.which;O+=K==50?N:K==49?-N:0;Z+=K==52?N:K==51?-N:0;R+=K==54?1:K==53?-1:0;X+=K==56?1:K==55?-1:0;D+=K==48?N:K==57?-N:0;T=30}; function e(o,s,v){l=C(C(o+P)*o-C(s*3+Q)*s);k=C(J*v/3*o-U*s);n=C(o+s+v+t);return l*l+k*k+n*n-1} setInterval(function(){t+=D;J=C(t/4);Q=t/5;P=t/6;U=C(t/7);for(i=z=0;i<W;i++){y=A-i/W;H=y*Z;for(j=0;j<W;j++){f=x=A-j/W;g=y;h=1;G=x*Z;I=Z;u=0.2;m=0.4;for(q=r=0;q>=0&&r<R;r++){q=e(f,g,h)-m;q*=10;f+=q*G;g+=q*H;h+=q*I;u+=q*0.0020}E=e(f+0.1,g+0.1,h+0.1);for(r=a=0;r<X;r++){b=4*(e(f+A*C(1.1*r),g+A*C(1.6*r),h+A*C(1.4*r))-m);a+=b>1?1:b<0?0:b}a*=255*O;p[z++]=a*u+E*0.3;p[z++]=a*A+E*0.6;p[z++]=a*A+E;z++}}c.putImageData(d,0,0);--T>0&&c.f(F(O*L)+" "+F(Z*L)+" "+R+" "+X+" "+F(D*L),9,L)},30);
M=Math,C=M.cos,F=M.floor,W=120,Z=0.06,O=.36,R=15,X=7,T=0,N=0.01,D=0.07,A=0.5,L=100;
V=document.getElementById('c');
V.width=V.height=W;
c=V.getContext("2d");
c.fillRect(0, 0, W,W);
// c.fillStyle="rgb(200,200,200)"; // 29 bytes, just to have white text ?
d = c.getImageData(0,0,W,W);
p=d.data;
t=1,t4=0,t5=0,t6=0,t7=0;
// simplicity, i love..
onkeydown=function(v)
{
K = v.which;
O+= K==50?N : K==49?-N :0;
Z+= K==52?N : K==51?-N :0;
R+= K==54?1 : K==53?-1 :0;
X+= K==56?1 : K==55?-1 :0;
D+= K==48?N : K==57?-N :0;
T=30
}
function e(r,g,b)
{
l=C(C(r+P)*r-C(g*3+Q)*g);
// this is the main time saver:
// consts instead of calling cos W*W*(R+X+1)*2 times.
// k=C(C(t4)*b/3*r-C(t7)*g);
k=C(J*b/3*r-U*g);
n=C(r+g+b+t);
return l*l+k*k+n*n-1 // funny, having squares here saves a lot of iterations..
//~ return l+k+n-1
}
setInterval(
function() {
t+=D,J=C(t/4),Q=t/5,P=t/6,U=C(t/7);
z = 0;
for ( i=0; i<W; i++ )
{
y=A-i/W;
H=y*Z;
for ( j=0; j<W; j++ )
{
x=A-j/W;
f=x,g=y,h=1,G=x*Z,I=Z,u=.2,m=.4;
// ray_march :
for( r=0,q=0; q>=0&&r<R; r++ )
{
q = e(f,g,h)-m;
q*=10;
f+=q*G;
g+=q*H;
h+=q*I;
u+=q*.002
}
// light (who needs a normal?) (!)
E = e(f+.1,g+.1,h+.1);
// ambient occlusion
a=0;
for( r=0; r<X; r++ )
{
b = 4 * ( e( f+A*C(1.1*r), g+A*C(1.6*r), h+A*C(1.4*r) ) - m );
a += b>1?1:(b<0?0:b)
}
a *= 255*O;
// set pixel
p[z++] = a*u + E*.3;
p[z++] = a*A + E*.6;
p[z++] = a*A + E;
z++
}
}
c.putImageData(d,0,0);
// O Z R X T
if(--T>0)c.fillText(F(O*L)+" "+F(Z*L)+" "+R+" "+X+" "+F(D*L), 9,L)
}
,30)
