import graph;
import stats;
size(500);
srand(10);

struct Star {
    pair pos;
    real mult;
}

real range = 48.0;

int n_stars=1000;
Star[] stars=new Star[n_stars];
for(int i=0; i < n_stars; ++i) {
    Star s=new Star;
    s.pos=(Gaussrand()*range*2,Gaussrand()*range*2);
    s.mult=1.0;
    if (unitrand()<0.2) {
        s.mult=1.5;
    } else {
        if (unitrand()<0.1) {
            s.mult=4.0;
        }
    }
    stars[i]=s;
}

Star origin=new Star;
origin.pos=(0,0);
origin.mult=1.0;

draw(circle(origin.pos,range*origin.mult),white);
draw(circle(origin.pos,range),white+dashed);
draw(circle(origin.pos,range*2),white+dashed);
draw(circle(origin.pos,range*4),white+dashed);
fill(circle(origin.pos,2),red);

for (Star s: stars) {
    if (length(s.pos-origin.pos)<(range*origin.mult)) {
        draw(s.pos--origin.pos,white+dashed);
        fill(circle(s.pos,s.mult),green);
    } else {
        fill(circle(s.pos,s.mult),white);
    }
};