public void add(double x,double y){
  if (len == data.length) {
    data=Arrays.copyOf(data,len << 1);
  }
  data[len++]=x;
  data[len++]=y;
  minx=Math.min(minx,x);
  maxx=Math.max(maxx,x);
  miny=Math.min(miny,y);
  maxy=Math.max(maxy,y);
}

public void add ( double x , double y ) { if ( len == data . length ) { data = Arrays . copyOf ( data , len << 1 ) ; } data [ len ++ ] = x ; data [ len ++ ] = y ; minx = Math . min ( minx , x ) ; maxx = Math . max ( maxx , x ) ; miny = Math . min ( miny , y ) ; maxy = Math . max ( maxy , y ) ; }
add a coordinate pair , but don ' t simplify
