Ran myran = new Ran(16);
for (i=0;i<NTRIES;i++) {
x=2.0*myran.doub()-1.0;
y=2.0*myran.doub()-1.0;
Quadvl quadvl = new Quadvl();
quadvl.quadvl(x,y,faW,fbW,fcW,fdW);
fa=faW.val;fb=fbW.val;fc=fcW.val;fd=fdW.val;
sbeps=1.e-15;
localflag = abs(fa+fb+fc+fd-1.0) > sbeps;
globalflag = globalflag || localflag;