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eval(s=(%w@
q=$*[0]&.to_i;
z="eval(s=(%w#{64.chr}#{s}##{s*9}#{64.chr}.join))";
h=25;w=80;
px=2;py=h/2;
vx=0.5;vy=-0.5;
qx=w-3;qy=h/2;
ux=-0.5;uy=0.5;
b=Array.new(h*w){|i|
y=i/w;
x=i%w;
(x==0||x==w-1||y==0||y==h-1)?2:(w/2<x)?1:0
};
f=->(x,y,vx,vy,c){
sx=vx;sy=vy;
8.times{|i|
t=i*Math::PI/4;
cos=Math.cos(t);
sin=Math.sin(t);
nx=x+cos/2;
ny=y+sin/2;
k=ny.to_i*w+nx.to_i;
if(0<=nx&&nx<w&&0<=ny&&ny<h&&b[k]!=c);
b[k]==2?0:b[k]=c;
(sin.abs<cos.abs)?sx*=-1:sy*=-1;
end
};
[sx,sy]
};
g=->(x,y,vx,vy){
[(x+vx<0||w<=x+vx)?-vx:vx,(y+vy<0||h<=y+vy)?-vy:vy]
};
j=0;
loop{
j+=1;
(vx,vy=f[px,py,vx,vy,0]);
(vx,vy=g[px,py,vx,vy]);
px+=vx;
py+=vy;
(ux,uy=f[qx,qy,ux,uy,1]);
(ux,uy=g[qx,qy,ux,uy]);
qx+=ux;
qy+=uy;
q&&((q<j)?(break):(q!=j)?(next):0);
q||(print"\e[H\e[2J");
c=[];
h.times{|y|
w.times{|x|
c<<!(b[y*w+x]==0&&[px.to_i,py.to_i]!=[x,y]||[qx.to_i,qy.to_i]==[x,y])
};
};
t=c.count(!!0);
i=0;
h.times{|y|
w.times{|x|
print((y==h-1&&x>=w-8)?"#{64.chr}.join))"[8+x-w]:c[y*w+x]?[z[i],i+=1][0]:32.chr)
};
puts;
};
sleep(0.05);
}
@.join))
|
