genRandReal3 method
Returns the next random double in the open interval (0, 1).
Implementation
double genRandReal3() {
var random = _randInt53();
var maxDouble = _maxDouble;
if (w >= 53) {
random >>>= 1;
maxDouble /= 2;
}
return (random.toDouble() + 0.5) * (1.0 / maxDouble);
}