import hull_pi;
import stats;
size(10cm);

pair[] cloud;
int nbpt=200;

// Generate random points.
for (int i=0; i < nbpt; ++i)
  cloud.push((10*unitrand(),10*unitrand()));

////////// GREY PART: angleMin=90 //////////
pair[] hull=hull(cloud,depthMin=0,depthMax=infinity,angleMin=90,angleMax=360);
filldraw(polygon(hull),lightgrey);

////////// YELLOW PART: angleMin=45 //////////
pair[] hull=hull(cloud,depthMin=0,depthMax=infinity,angleMin=45,angleMax=360);
filldraw(polygon(hull),lightyellow);

////////// BLUE PART: angleMin=0 //////////
pair[] hull=hull(cloud,depthMin=0,depthMax=infinity,angleMin=0,angleMax=360);
filldraw(polygon(hull),lightblue);

dot(cloud,red);